Class.java: Imports reworked, reformated.
2004-01-25 Michael Koch <konqueror@gmx.de> * java/lang/Class.java: Imports reworked, reformated. (Class): Javadoc added. (forName): Likewise. (getClasses): Likewise. (getClassLoader): Likewise. (getComponentType): Likewise. (getConstructor): Likewise. (getConstructors): Likewise. (getDeclaredConstructor): Likewise. (getDeclaredClasses): Likewise. (getDeclaredConstructors): Likewise. (getDeclaredField): Likewise. (getDeclaredMethod): Likewise. (getDeclaredMethods): Likewise. (getDeclaringClass): Likewise. (getField): Likewise. (getInterfaces): Likewise. (getMethod): Likewise. (getMethods): Likewise. (getModifiers): Likewise. (getName): Likewise. (getResource): Likewise. (getResourceAsStream): Likewise. (getSigners): Likewise. (setSigners): Likewise. (getSuperclass): Likewise. (isArray): Likewise. (isAssignableFrom): Likewise. (isInstance): Likewise. (isInterface): Likewise. (isPrimitive): Likewise. (newInstance): Likewise. (getProtectionDomain): Likewise. (toString): Likewise. (Class): Moved. (initializeClass): Likewise. (finalize): Likewise. From-SVN: r76554
This commit is contained in:
Michael Koch
Michael Koch
parent
e6d8312885
commit
135f54eb84
2 changed files with 582 additions and 92 deletions
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@ -38,39 +38,159 @@ exception statement from your version. */
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package java.lang;
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import java.io.Serializable;
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import java.io.InputStream;
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import java.lang.reflect.*;
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import java.security.*;
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import java.io.Serializable;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Field;
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import java.lang.reflect.Member;
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import java.lang.reflect.Method;
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import java.net.URL;
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import java.security.ProtectionDomain;
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import java.util.Arrays;
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import java.util.HashSet;
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/**
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* A Class represents a Java type. There will never be multiple Class
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* objects with identical names and ClassLoaders. Primitive types, array
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* types, and void also have a Class object.
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*
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* <p>Arrays with identical type and number of dimensions share the same
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* class (and null "system" ClassLoader, incidentally). The name of an
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* array class is <code>[<signature format>;</code> ... for example,
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* String[]'s class is <code>[Ljava.lang.String;</code>. boolean, byte,
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* short, char, int, long, float and double have the "type name" of
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* Z,B,S,C,I,J,F,D for the purposes of array classes. If it's a
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* multidimensioned array, the same principle applies:
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* <code>int[][][]</code> == <code>[[[I</code>.
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*
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* <p>There is no public constructor - Class objects are obtained only through
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* the virtual machine, as defined in ClassLoaders.
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*
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* @serialData Class objects serialize specially:
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* <code>TC_CLASS ClassDescriptor</code>. For more serialization information,
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* see {@link ObjectStreamClass}.
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*
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* @author John Keiser
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* @author Eric Blake <ebb9@email.byu.edu>
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* @author Tom Tromey <tromey@cygnus.com>
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* @date October 1, 1998
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* @since 1.0
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* @see ClassLoader
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*/
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/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
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* "The Java Language Specification", ISBN 0-201-63451-1
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* plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
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* plus gcj compiler sources (to determine object layout)
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* Status: Sufficient for our purposes, but some methods missing
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* and some not implemented.
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*/
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public final class Class implements Serializable
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{
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/**
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* Class is non-instantiable from Java code; only the VM can create
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* instances of this class.
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*/
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private Class ()
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{
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}
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// Initialize the class.
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private native void initializeClass ();
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// finalization
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protected native void finalize () throws Throwable;
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/**
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* Use the classloader of the current class to load, link, and initialize
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* a class. This is equivalent to your code calling
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* <code>Class.forName(name, true, getClass().getClassLoader())</code>.
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*
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* @param name the name of the class to find
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* @return the Class object representing the class
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* @throws ClassNotFoundException if the class was not found by the
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* classloader
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* @throws LinkageError if linking the class fails
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* @throws ExceptionInInitializerError if the class loads, but an exception
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* occurs during initialization
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*/
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public static native Class forName (String className)
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throws ClassNotFoundException;
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/** @since 1.2 */
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/**
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* Use the specified classloader to load and link a class. If the loader
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* is null, this uses the bootstrap class loader (provide the security
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* check succeeds). Unfortunately, this method cannot be used to obtain
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* the Class objects for primitive types or for void, you have to use
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* the fields in the appropriate java.lang wrapper classes.
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*
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* <p>Calls <code>classloader.loadclass(name, initialize)</code>.
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*
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* @param name the name of the class to find
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* @param initialize whether or not to initialize the class at this time
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* @param classloader the classloader to use to find the class; null means
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* to use the bootstrap class loader
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* @throws ClassNotFoundException if the class was not found by the
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* classloader
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* @throws LinkageError if linking the class fails
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* @throws ExceptionInInitializerError if the class loads, but an exception
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* occurs during initialization
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* @throws SecurityException if the <code>classloader</code> argument
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* is <code>null</code> and the caller does not have the
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* <code>RuntimePermission("getClassLoader")</code> permission
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* @see ClassLoader
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* @since 1.2
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*/
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public static native Class forName (String className, boolean initialize,
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ClassLoader loader)
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throws ClassNotFoundException;
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/**
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* Get all the public member classes and interfaces declared in this
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* class or inherited from superclasses. This returns an array of length
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* 0 if there are no member classes, including for primitive types. A
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* security check may be performed, with
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* <code>checkMemberAccess(this, Member.PUBLIC)</code> as well as
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* <code>checkPackageAccess</code> both having to succeed.
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*
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* @return all public member classes in this class
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* @throws SecurityException if the security check fails
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* @since 1.1
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*/
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public native Class[] getClasses ();
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/**
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* Get the ClassLoader that loaded this class. If it was loaded by the
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* system classloader, this method will return null. If there is a security
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* manager, and the caller's class loader does not match the requested
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* one, a security check of <code>RuntimePermission("getClassLoader")</code>
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* must first succeed. Primitive types and void return null.
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*
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* @return the ClassLoader that loaded this class
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* @throws SecurityException if the security check fails
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* @see ClassLoader
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* @see RuntimePermission
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*/
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public native ClassLoader getClassLoader ();
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/**
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* If this is an array, get the Class representing the type of array.
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* Examples: "[[Ljava.lang.String;" would return "[Ljava.lang.String;", and
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* calling getComponentType on that would give "java.lang.String". If
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* this is not an array, returns null.
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*
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* @return the array type of this class, or null
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* @see Array
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* @since 1.1
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*/
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public native Class getComponentType ();
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public native Constructor getConstructor (Class[] parameterTypes)
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/**
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* Get a public constructor declared in this class. If the constructor takes
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* no argument, an array of zero elements and null are equivalent for the
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* types argument. A security check may be performed, with
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* <code>checkMemberAccess(this, Member.PUBLIC)</code> as well as
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* <code>checkPackageAccess</code> both having to succeed.
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*
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* @param types the type of each parameter
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* @return the constructor
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* @throws NoSuchMethodException if the constructor does not exist
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* @throws SecurityException if the security check fails
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* @see #getConstructors()
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* @since 1.1
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*/
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public native Constructor getConstructor(Class[] args)
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throws NoSuchMethodException, SecurityException;
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// This is used to implement getConstructors and
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@ -78,22 +198,87 @@ public final class Class implements Serializable
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private native Constructor[] _getConstructors (boolean declared)
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throws SecurityException;
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public Constructor[] getConstructors () throws SecurityException
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/**
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* Get all the public constructors of this class. This returns an array of
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* length 0 if there are no constructors, including for primitive types,
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* arrays, and interfaces. It does, however, include the default
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* constructor if one was supplied by the compiler. A security check may
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* be performed, with <code>checkMemberAccess(this, Member.PUBLIC)</code>
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* as well as <code>checkPackageAccess</code> both having to succeed.
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*
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* @return all public constructors in this class
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* @throws SecurityException if the security check fails
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* @since 1.1
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*/
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public Constructor[] getConstructors()
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throws SecurityException
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{
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return _getConstructors (false);
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return _getConstructors(false);
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}
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public native Constructor getDeclaredConstructor (Class[] parameterTypes)
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/**
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* Get a constructor declared in this class. If the constructor takes no
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* argument, an array of zero elements and null are equivalent for the
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* types argument. A security check may be performed, with
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* <code>checkMemberAccess(this, Member.DECLARED)</code> as well as
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* <code>checkPackageAccess</code> both having to succeed.
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*
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* @param types the type of each parameter
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* @return the constructor
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* @throws NoSuchMethodException if the constructor does not exist
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* @throws SecurityException if the security check fails
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* @see #getDeclaredConstructors()
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* @since 1.1
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*/
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public native Constructor getDeclaredConstructor(Class[] args)
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throws NoSuchMethodException, SecurityException;
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public native Class[] getDeclaredClasses () throws SecurityException;
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/**
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* Get all the declared member classes and interfaces in this class, but
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* not those inherited from superclasses. This returns an array of length
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* 0 if there are no member classes, including for primitive types. A
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* security check may be performed, with
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* <code>checkMemberAccess(this, Member.DECLARED)</code> as well as
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* <code>checkPackageAccess</code> both having to succeed.
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*
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* @return all declared member classes in this class
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* @throws SecurityException if the security check fails
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* @since 1.1
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*/
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public native Class[] getDeclaredClasses() throws SecurityException;
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public Constructor[] getDeclaredConstructors () throws SecurityException
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/**
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* Get all the declared constructors of this class. This returns an array of
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* length 0 if there are no constructors, including for primitive types,
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* arrays, and interfaces. It does, however, include the default
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* constructor if one was supplied by the compiler. A security check may
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* be performed, with <code>checkMemberAccess(this, Member.DECLARED)</code>
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* as well as <code>checkPackageAccess</code> both having to succeed.
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*
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* @return all constructors in this class
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* @throws SecurityException if the security check fails
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* @since 1.1
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*/
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public Constructor[] getDeclaredConstructors()
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throws SecurityException
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{
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return _getConstructors (true);
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return _getConstructors(true);
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}
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public native Field getDeclaredField (String fieldName)
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/**
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* Get a field declared in this class, where name is its simple name. The
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* implicit length field of arrays is not available. A security check may
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* be performed, with <code>checkMemberAccess(this, Member.DECLARED)</code>
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* as well as <code>checkPackageAccess</code> both having to succeed.
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*
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* @param name the name of the field
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* @return the field
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* @throws NoSuchFieldException if the field does not exist
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* @throws SecurityException if the security check fails
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* @see #getDeclaredFields()
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* @since 1.1
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*/
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public native Field getDeclaredField(String fieldName)
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throws NoSuchFieldException, SecurityException;
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/**
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@ -116,10 +301,30 @@ public final class Class implements Serializable
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native Field[] getDeclaredFields (boolean publicOnly);
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private native Method _getDeclaredMethod (String methodName,
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Class[] parameterTypes);
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private native Method _getDeclaredMethod(String methodName, Class[] args);
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public Method getDeclaredMethod (String methodName, Class[] parameterTypes)
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/**
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* Get a method declared in this class, where name is its simple name. The
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* implicit methods of Object are not available from arrays or interfaces.
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* Constructors (named "<init>" in the class file) and class initializers
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* (name "<clinit>") are not available. The Virtual Machine allows
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* multiple methods with the same signature but differing return types; in
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* such a case the most specific return types are favored, then the final
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* choice is arbitrary. If the method takes no argument, an array of zero
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* elements and null are equivalent for the types argument. A security
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* check may be performed, with
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* <code>checkMemberAccess(this, Member.DECLARED)</code> as well as
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* <code>checkPackageAccess</code> both having to succeed.
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*
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* @param methodName the name of the method
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* @param types the type of each parameter
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* @return the method
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* @throws NoSuchMethodException if the method does not exist
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* @throws SecurityException if the security check fails
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* @see #getDeclaredMethods()
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* @since 1.1
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*/
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public Method getDeclaredMethod(String methodName, Class[] args)
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throws NoSuchMethodException, SecurityException
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{
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memberAccessCheck(Member.DECLARED);
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@ -127,28 +332,66 @@ public final class Class implements Serializable
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if ("<init>".equals(methodName) || "<clinit>".equals(methodName))
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throw new NoSuchMethodException(methodName);
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Method m = _getDeclaredMethod(methodName, parameterTypes);
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if (m == null)
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throw new NoSuchMethodException (methodName);
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return m;
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Method match = _getDeclaredMethod(methodName, args);
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if (match == null)
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throw new NoSuchMethodException(methodName);
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return match;
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}
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/**
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* Get all the declared methods in this class, but not those inherited from
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* superclasses. This returns an array of length 0 if there are no methods,
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* including for primitive types. This does include the implicit methods of
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* arrays and interfaces which mirror methods of Object, nor does it
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* include constructors or the class initialization methods. The Virtual
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* Machine allows multiple methods with the same signature but differing
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* return types; all such methods are in the returned array. A security
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* check may be performed, with
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* <code>checkMemberAccess(this, Member.DECLARED)</code> as well as
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* <code>checkPackageAccess</code> both having to succeed.
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*
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* @return all declared methods in this class
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* @throws SecurityException if the security check fails
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* @since 1.1
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*/
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public native Method[] getDeclaredMethods () throws SecurityException;
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/**
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* If this is a nested or inner class, return the class that declared it.
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* If not, return null.
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*
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* @return the declaring class of this class
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* @since 1.1
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*/
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// This is marked as unimplemented in the JCL book.
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public native Class getDeclaringClass ();
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private native Field getField (String fieldName, int hash)
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throws NoSuchFieldException, SecurityException;
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public Field getField (String fieldName)
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/**
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* Get a public field declared or inherited in this class, where name is
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* its simple name. If the class contains multiple accessible fields by
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* that name, an arbitrary one is returned. The implicit length field of
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* arrays is not available. A security check may be performed, with
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* <code>checkMemberAccess(this, Member.PUBLIC)</code> as well as
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* <code>checkPackageAccess</code> both having to succeed.
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*
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* @param fieldName the name of the field
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* @return the field
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* @throws NoSuchFieldException if the field does not exist
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* @throws SecurityException if the security check fails
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* @see #getFields()
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* @since 1.1
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*/
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public Field getField(String fieldName)
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throws NoSuchFieldException, SecurityException
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{
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memberAccessCheck (Member.PUBLIC);
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Field fld = getField(fieldName, fieldName.hashCode());
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if (fld == null)
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memberAccessCheck(Member.PUBLIC);
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Field field = getField(fieldName, fieldName.hashCode());
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if (field == null)
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throw new NoSuchFieldException(fieldName);
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return fld;
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return field;
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}
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/**
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@ -191,6 +434,7 @@ public final class Class implements Serializable
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* classloader of this class or when the classloader of this class
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* is null.
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*
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* @return the package for this class, if it is available
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* @since 1.2
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*/
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public Package getPackage()
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@ -205,19 +449,48 @@ public final class Class implements Serializable
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pkg = name.substring(0, idx);
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return cl.getPackage(pkg);
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}
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else
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return null;
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return null;
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}
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/**
|
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* Get the interfaces this class <em>directly</em> implements, in the
|
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* order that they were declared. This returns an empty array, not null,
|
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* for Object, primitives, void, and classes or interfaces with no direct
|
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* superinterface. Array types return Cloneable and Serializable.
|
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*
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* @return the interfaces this class directly implements
|
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*/
|
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public native Class[] getInterfaces ();
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private final native void getSignature (StringBuffer buffer);
|
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private static final native String getSignature (Class[] parameterTypes,
|
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boolean is_construtor);
|
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private final native void getSignature(StringBuffer buffer);
|
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private static final native String getSignature(Class[] args,
|
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boolean is_construtor);
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|
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public native Method _getMethod (String methodName, Class[] parameterTypes);
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public native Method _getMethod(String methodName, Class[] args);
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|
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public Method getMethod (String methodName, Class[] parameterTypes)
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/**
|
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* Get a public method declared or inherited in this class, where name is
|
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* its simple name. The implicit methods of Object are not available from
|
||||
* interfaces. Constructors (named "<init>" in the class file) and class
|
||||
* initializers (name "<clinit>") are not available. The Virtual
|
||||
* Machine allows multiple methods with the same signature but differing
|
||||
* return types, and the class can inherit multiple methods of the same
|
||||
* return type; in such a case the most specific return types are favored,
|
||||
* then the final choice is arbitrary. If the method takes no argument, an
|
||||
* array of zero elements and null are equivalent for the types argument.
|
||||
* A security check may be performed, with
|
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* <code>checkMemberAccess(this, Member.PUBLIC)</code> as well as
|
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* <code>checkPackageAccess</code> both having to succeed.
|
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*
|
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* @param methodName the name of the method
|
||||
* @param types the type of each parameter
|
||||
* @return the method
|
||||
* @throws NoSuchMethodException if the method does not exist
|
||||
* @throws SecurityException if the security check fails
|
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* @see #getMethods()
|
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* @since 1.1
|
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*/
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||||
public Method getMethod(String methodName, Class[] args)
|
||||
throws NoSuchMethodException, SecurityException
|
||||
{
|
||||
memberAccessCheck(Member.PUBLIC);
|
||||
|
|
@ -225,64 +498,243 @@ public final class Class implements Serializable
|
|||
if ("<init>".equals(methodName) || "<clinit>".equals(methodName))
|
||||
throw new NoSuchMethodException(methodName);
|
||||
|
||||
Method m = _getMethod(methodName, parameterTypes);
|
||||
if (m == null)
|
||||
throw new NoSuchMethodException (methodName);
|
||||
return m;
|
||||
Method method = _getMethod(methodName, args);
|
||||
if (method == null)
|
||||
throw new NoSuchMethodException(methodName);
|
||||
return method;
|
||||
}
|
||||
|
||||
private native int _getMethods (Method[] result, int offset);
|
||||
|
||||
/**
|
||||
* Get all the public methods declared in this class or inherited from
|
||||
* superclasses. This returns an array of length 0 if there are no methods,
|
||||
* including for primitive types. This does not include the implicit
|
||||
* methods of interfaces which mirror methods of Object, nor does it
|
||||
* include constructors or the class initialization methods. The Virtual
|
||||
* Machine allows multiple methods with the same signature but differing
|
||||
* return types; all such methods are in the returned array. A security
|
||||
* check may be performed, with
|
||||
* <code>checkMemberAccess(this, Member.PUBLIC)</code> as well as
|
||||
* <code>checkPackageAccess</code> both having to succeed.
|
||||
*
|
||||
* @return all public methods in this class
|
||||
* @throws SecurityException if the security check fails
|
||||
* @since 1.1
|
||||
*/
|
||||
public native Method[] getMethods () throws SecurityException;
|
||||
|
||||
/**
|
||||
* Get the modifiers of this class. These can be decoded using Modifier,
|
||||
* and is limited to one of public, protected, or private, and any of
|
||||
* final, static, abstract, or interface. An array class has the same
|
||||
* public, protected, or private modifier as its component type, and is
|
||||
* marked final but not an interface. Primitive types and void are marked
|
||||
* public and final, but not an interface.
|
||||
*
|
||||
* @return the modifiers of this class
|
||||
* @see Modifer
|
||||
* @since 1.1
|
||||
*/
|
||||
public native int getModifiers ();
|
||||
|
||||
/**
|
||||
* Get the name of this class, separated by dots for package separators.
|
||||
* Primitive types and arrays are encoded as:
|
||||
* <pre>
|
||||
* boolean Z
|
||||
* byte B
|
||||
* char C
|
||||
* short S
|
||||
* int I
|
||||
* long J
|
||||
* float F
|
||||
* double D
|
||||
* void V
|
||||
* array type [<em>element type</em>
|
||||
* class or interface, alone: <dotted name>
|
||||
* class or interface, as element type: L<dotted name>;
|
||||
*
|
||||
* @return the name of this class
|
||||
*/
|
||||
public native String getName ();
|
||||
|
||||
public java.net.URL getResource (String resourceName)
|
||||
/**
|
||||
* Get a resource URL using this class's package using the
|
||||
* getClassLoader().getResource() method. If this class was loaded using
|
||||
* the system classloader, ClassLoader.getSystemResource() is used instead.
|
||||
*
|
||||
* <p>If the name you supply is absolute (it starts with a <code>/</code>),
|
||||
* then it is passed on to getResource() as is. If it is relative, the
|
||||
* package name is prepended, and <code>.</code>'s are replaced with
|
||||
* <code>/</code>.
|
||||
*
|
||||
* <p>The URL returned is system- and classloader-dependent, and could
|
||||
* change across implementations.
|
||||
*
|
||||
* @param resourceName the name of the resource, generally a path
|
||||
* @return the URL to the resource
|
||||
* @throws NullPointerException if name is null
|
||||
* @since 1.1
|
||||
*/
|
||||
public URL getResource(String resourceName)
|
||||
{
|
||||
String name = resourcePath (resourceName);
|
||||
ClassLoader loader = getClassLoader ();
|
||||
String name = resourcePath(resourceName);
|
||||
ClassLoader loader = getClassLoader();
|
||||
if (loader == null)
|
||||
return ClassLoader.getSystemResource (name);
|
||||
else
|
||||
return loader.getResource (name);
|
||||
return ClassLoader.getSystemResource(name);
|
||||
return loader.getResource(name);
|
||||
}
|
||||
|
||||
public java.io.InputStream getResourceAsStream (String resourceName)
|
||||
/**
|
||||
* Get a resource using this class's package using the
|
||||
* getClassLoader().getResourceAsStream() method. If this class was loaded
|
||||
* using the system classloader, ClassLoader.getSystemResource() is used
|
||||
* instead.
|
||||
*
|
||||
* <p>If the name you supply is absolute (it starts with a <code>/</code>),
|
||||
* then it is passed on to getResource() as is. If it is relative, the
|
||||
* package name is prepended, and <code>.</code>'s are replaced with
|
||||
* <code>/</code>.
|
||||
*
|
||||
* <p>The URL returned is system- and classloader-dependent, and could
|
||||
* change across implementations.
|
||||
*
|
||||
* @param resourceName the name of the resource, generally a path
|
||||
* @return an InputStream with the contents of the resource in it, or null
|
||||
* @throws NullPointerException if name is null
|
||||
* @since 1.1
|
||||
*/
|
||||
public InputStream getResourceAsStream(String resourceName)
|
||||
{
|
||||
String name = resourcePath (resourceName);
|
||||
ClassLoader loader = getClassLoader ();
|
||||
String name = resourcePath(resourceName);
|
||||
ClassLoader loader = getClassLoader();
|
||||
if (loader == null)
|
||||
return ClassLoader.getSystemResourceAsStream (name);
|
||||
else
|
||||
return loader.getResourceAsStream (name);
|
||||
return ClassLoader.getSystemResourceAsStream(name);
|
||||
return loader.getResourceAsStream(name);
|
||||
}
|
||||
|
||||
private String resourcePath (String resourceName)
|
||||
private String resourcePath(String resourceName)
|
||||
{
|
||||
if (resourceName.startsWith ("/"))
|
||||
return resourceName.substring (1);
|
||||
if (resourceName.startsWith("/"))
|
||||
return resourceName.substring(1);
|
||||
|
||||
Class c = this;
|
||||
while (c.isArray ())
|
||||
c = c.getComponentType ();
|
||||
while (c.isArray())
|
||||
c = c.getComponentType();
|
||||
|
||||
String packageName = c.getName ().replace ('.', '/');
|
||||
int end = packageName.lastIndexOf ('/');
|
||||
if (end == -1)
|
||||
return resourceName;
|
||||
else
|
||||
return packageName.substring (0, end+1) + resourceName;
|
||||
String packageName = c.getName().replace('.', '/');
|
||||
int end = packageName.lastIndexOf('/');
|
||||
if (end != -1)
|
||||
return packageName.substring(0, end + 1) + resourceName;
|
||||
return resourceName;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the signers of this class. This returns null if there are no signers,
|
||||
* such as for primitive types or void.
|
||||
*
|
||||
* @return the signers of this class
|
||||
* @since 1.1
|
||||
*/
|
||||
public native Object[] getSigners ();
|
||||
|
||||
/**
|
||||
* Set the signers of this class.
|
||||
*
|
||||
* @param signers the signers of this class
|
||||
*/
|
||||
native void setSigners(Object[] signers);
|
||||
|
||||
/**
|
||||
* Get the direct superclass of this class. If this is an interface,
|
||||
* Object, a primitive type, or void, it will return null. If this is an
|
||||
* array type, it will return Object.
|
||||
*
|
||||
* @return the direct superclass of this class
|
||||
*/
|
||||
public native Class getSuperclass ();
|
||||
|
||||
/**
|
||||
* Return whether this class is an array type.
|
||||
*
|
||||
* @return whether this class is an array type
|
||||
* @since 1.1
|
||||
*/
|
||||
public native boolean isArray ();
|
||||
public native boolean isAssignableFrom (Class cls);
|
||||
public native boolean isInstance (Object obj);
|
||||
|
||||
/**
|
||||
* Discover whether an instance of the Class parameter would be an
|
||||
* instance of this Class as well. Think of doing
|
||||
* <code>isInstance(c.newInstance())</code> or even
|
||||
* <code>c.newInstance() instanceof (this class)</code>. While this
|
||||
* checks widening conversions for objects, it must be exact for primitive
|
||||
* types.
|
||||
*
|
||||
* @param c the class to check
|
||||
* @return whether an instance of c would be an instance of this class
|
||||
* as well
|
||||
* @throws NullPointerException if c is null
|
||||
* @since 1.1
|
||||
*/
|
||||
public native boolean isAssignableFrom (Class c);
|
||||
|
||||
/**
|
||||
* Discover whether an Object is an instance of this Class. Think of it
|
||||
* as almost like <code>o instanceof (this class)</code>.
|
||||
*
|
||||
* @param o the Object to check
|
||||
* @return whether o is an instance of this class
|
||||
* @since 1.1
|
||||
*/
|
||||
public native boolean isInstance (Object o);
|
||||
|
||||
/**
|
||||
* Check whether this class is an interface or not. Array types are not
|
||||
* interfaces.
|
||||
*
|
||||
* @return whether this class is an interface or not
|
||||
*/
|
||||
public native boolean isInterface ();
|
||||
|
||||
/**
|
||||
* Return whether this class is a primitive type. A primitive type class
|
||||
* is a class representing a kind of "placeholder" for the various
|
||||
* primitive types, or void. You can access the various primitive type
|
||||
* classes through java.lang.Boolean.TYPE, java.lang.Integer.TYPE, etc.,
|
||||
* or through boolean.class, int.class, etc.
|
||||
*
|
||||
* @return whether this class is a primitive type
|
||||
* @see Boolean#TYPE
|
||||
* @see Byte#TYPE
|
||||
* @see Character#TYPE
|
||||
* @see Short#TYPE
|
||||
* @see Integer#TYPE
|
||||
* @see Long#TYPE
|
||||
* @see Float#TYPE
|
||||
* @see Double#TYPE
|
||||
* @see Void#TYPE
|
||||
* @since 1.1
|
||||
*/
|
||||
public native boolean isPrimitive ();
|
||||
|
||||
/**
|
||||
* Get a new instance of this class by calling the no-argument constructor.
|
||||
* The class is initialized if it has not been already. A security check
|
||||
* may be performed, with <code>checkMemberAccess(this, Member.PUBLIC)</code>
|
||||
* as well as <code>checkPackageAccess</code> both having to succeed.
|
||||
*
|
||||
* @return a new instance of this class
|
||||
* @throws InstantiationException if there is not a no-arg constructor
|
||||
* for this class, including interfaces, abstract classes, arrays,
|
||||
* primitive types, and void; or if an exception occurred during
|
||||
* the constructor
|
||||
* @throws IllegalAccessException if you are not allowed to access the
|
||||
* no-arg constructor because of scoping reasons
|
||||
* @throws SecurityException if the security check fails
|
||||
* @throws ExceptionInInitializerError if class initialization caused by
|
||||
* this call fails with an exception
|
||||
*/
|
||||
public native Object newInstance ()
|
||||
throws InstantiationException, IllegalAccessException;
|
||||
|
||||
|
|
@ -291,14 +743,15 @@ public final class Class implements Serializable
|
|||
private native ProtectionDomain getProtectionDomain0();
|
||||
|
||||
/**
|
||||
* Returns the protection domain of this class. If the classloader
|
||||
* did not record the protection domain when creating this class
|
||||
* the unknown protection domain is returned which has a <code>null</code>
|
||||
* code source and all permissions.
|
||||
* Returns the protection domain of this class. If the classloader did not
|
||||
* record the protection domain when creating this class the unknown
|
||||
* protection domain is returned which has a <code>null</code> code source
|
||||
* and all permissions.
|
||||
*
|
||||
* @exception SecurityException if a security manager exists and the caller
|
||||
* @return the protection domain
|
||||
* @throws SecurityException if the security manager exists and the caller
|
||||
* does not have <code>RuntimePermission("getProtectionDomain")</code>.
|
||||
*
|
||||
* @see RuntimePermission
|
||||
* @since 1.2
|
||||
*/
|
||||
public ProtectionDomain getProtectionDomain()
|
||||
|
|
@ -315,11 +768,18 @@ public final class Class implements Serializable
|
|||
return protectionDomain;
|
||||
}
|
||||
|
||||
public String toString ()
|
||||
/**
|
||||
* Return the human-readable form of this Object. For an object, this
|
||||
* is either "interface " or "class " followed by <code>getName()</code>,
|
||||
* for primitive types and void it is just <code>getName()</code>.
|
||||
*
|
||||
* @return the human-readable form of this Object
|
||||
*/
|
||||
public String toString()
|
||||
{
|
||||
if (isPrimitive ())
|
||||
return getName ();
|
||||
return (isInterface () ? "interface " : "class ") + getName ();
|
||||
if (isPrimitive())
|
||||
return getName();
|
||||
return (isInterface() ? "interface " : "class ") + getName();
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -391,17 +851,6 @@ public final class Class implements Serializable
|
|||
return c.defaultAssertionStatus;
|
||||
}
|
||||
|
||||
// Don't allow new classes to be made.
|
||||
private Class ()
|
||||
{
|
||||
}
|
||||
|
||||
// Initialize the class.
|
||||
private native void initializeClass ();
|
||||
|
||||
// finalization
|
||||
protected native void finalize () throws Throwable;
|
||||
|
||||
/**
|
||||
* Strip the last portion of the name (after the last dot).
|
||||
*
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue