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Class.java: Imports reworked, reformated.

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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 2004-01-25 13:08:08 +00:00 • committed by Michael Koch
parent e6d8312885
commit 135f54eb84
2 changed files with 582 additions and 92 deletions
Download patch file Download diff file Expand all files Collapse all files

41
libjava/ChangeLog
View file

@ -1,3 +1,43 @@
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.
2004-01-24 Michael Koch <konqueror@gmx.de> 2004-01-24 Michael Koch <konqueror@gmx.de>
* gnu/java/net/protocol/jar/Connection.java * gnu/java/net/protocol/jar/Connection.java
@ -43,6 +83,7 @@
2004-01-23 Michael Koch <konqueror@gmx.de> 2004-01-23 Michael Koch <konqueror@gmx.de>
* java/lang/VMClassLoader.java: Reworked imports. * java/lang/VMClassLoader.java: Reworked imports.
2004-01-23 Michael Koch <konqueror@gmx.de> 2004-01-23 Michael Koch <konqueror@gmx.de>
* javax/swing/AbstractAction.java: Reformated. * javax/swing/AbstractAction.java: Reformated.

633
libjava/java/lang/Class.java
View file

@ -38,39 +38,159 @@ exception statement from your version. */
package java.lang; package java.lang;
import java.io.Serializable;
import java.io.InputStream; import java.io.InputStream;
import java.lang.reflect.*; import java.io.Serializable;
import java.security.*; import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.net.URL;
import java.security.ProtectionDomain;
import java.util.Arrays; import java.util.Arrays;
import java.util.HashSet; import java.util.HashSet;
/** /**
* A Class represents a Java type. There will never be multiple Class
* objects with identical names and ClassLoaders. Primitive types, array
* types, and void also have a Class object.
*
* <p>Arrays with identical type and number of dimensions share the same
* class (and null "system" ClassLoader, incidentally). The name of an
* array class is <code>[&lt;signature format&gt;;</code> ... for example,
* String[]'s class is <code>[Ljava.lang.String;</code>. boolean, byte,
* short, char, int, long, float and double have the "type name" of
* Z,B,S,C,I,J,F,D for the purposes of array classes. If it's a
* multidimensioned array, the same principle applies:
* <code>int[][][]</code> == <code>[[[I</code>.
*
* <p>There is no public constructor - Class objects are obtained only through
* the virtual machine, as defined in ClassLoaders.
*
* @serialData Class objects serialize specially:
* <code>TC_CLASS ClassDescriptor</code>. For more serialization information,
* see {@link ObjectStreamClass}.
*
* @author John Keiser
* @author Eric Blake <ebb9@email.byu.edu>
* @author Tom Tromey <tromey@cygnus.com> * @author Tom Tromey <tromey@cygnus.com>
* @date October 1, 1998 * @since 1.0
* @see ClassLoader
*/ */
/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
* "The Java Language Specification", ISBN 0-201-63451-1
* plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
* plus gcj compiler sources (to determine object layout)
* Status: Sufficient for our purposes, but some methods missing
* and some not implemented.
*/
public final class Class implements Serializable public final class Class implements Serializable
{ {
/**
* Class is non-instantiable from Java code; only the VM can create
* instances of this class.
*/
private Class ()
{
}
// Initialize the class.
private native void initializeClass ();
// finalization
protected native void finalize () throws Throwable;
/**
* Use the classloader of the current class to load, link, and initialize
* a class. This is equivalent to your code calling
* <code>Class.forName(name, true, getClass().getClassLoader())</code>.
*
* @param name the name of the class to find
* @return the Class object representing the class
* @throws ClassNotFoundException if the class was not found by the
* classloader
* @throws LinkageError if linking the class fails
* @throws ExceptionInInitializerError if the class loads, but an exception
* occurs during initialization
*/
public static native Class forName (String className) public static native Class forName (String className)
throws ClassNotFoundException; throws ClassNotFoundException;
/** @since 1.2 */
/**
* Use the specified classloader to load and link a class. If the loader
* is null, this uses the bootstrap class loader (provide the security
* check succeeds). Unfortunately, this method cannot be used to obtain
* the Class objects for primitive types or for void, you have to use
* the fields in the appropriate java.lang wrapper classes.
*
* <p>Calls <code>classloader.loadclass(name, initialize)</code>.
*
* @param name the name of the class to find
* @param initialize whether or not to initialize the class at this time
* @param classloader the classloader to use to find the class; null means
* to use the bootstrap class loader
* @throws ClassNotFoundException if the class was not found by the
* classloader
* @throws LinkageError if linking the class fails
* @throws ExceptionInInitializerError if the class loads, but an exception
* occurs during initialization
* @throws SecurityException if the <code>classloader</code> argument
* is <code>null</code> and the caller does not have the
* <code>RuntimePermission("getClassLoader")</code> permission
* @see ClassLoader
* @since 1.2
*/
public static native Class forName (String className, boolean initialize, public static native Class forName (String className, boolean initialize,
ClassLoader loader) ClassLoader loader)
throws ClassNotFoundException; throws ClassNotFoundException;
/**
* Get all the public member classes and interfaces declared in this
* class or inherited from superclasses. This returns an array of length
* 0 if there are no member classes, including for primitive types. 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 member classes in this class
* @throws SecurityException if the security check fails
* @since 1.1
*/
public native Class[] getClasses (); public native Class[] getClasses ();
/**
* Get the ClassLoader that loaded this class. If it was loaded by the
* system classloader, this method will return null. If there is a security
* manager, and the caller's class loader does not match the requested
* one, a security check of <code>RuntimePermission("getClassLoader")</code>
* must first succeed. Primitive types and void return null.
*
* @return the ClassLoader that loaded this class
* @throws SecurityException if the security check fails
* @see ClassLoader
* @see RuntimePermission
*/
public native ClassLoader getClassLoader (); public native ClassLoader getClassLoader ();
/**
* If this is an array, get the Class representing the type of array.
* Examples: "[[Ljava.lang.String;" would return "[Ljava.lang.String;", and
* calling getComponentType on that would give "java.lang.String". If
* this is not an array, returns null.
*
* @return the array type of this class, or null
* @see Array
* @since 1.1
*/
public native Class getComponentType (); public native Class getComponentType ();
public native Constructor getConstructor (Class[] parameterTypes) /**
* Get a public constructor declared in this class. If the constructor takes
* no argument, an array of zero elements and null are equivalent for the
* types argument. A security check may be performed, with
* <code>checkMemberAccess(this, Member.PUBLIC)</code> as well as
* <code>checkPackageAccess</code> both having to succeed.
*
* @param types the type of each parameter
* @return the constructor
* @throws NoSuchMethodException if the constructor does not exist
* @throws SecurityException if the security check fails
* @see #getConstructors()
* @since 1.1
*/
public native Constructor getConstructor(Class[] args)
throws NoSuchMethodException, SecurityException; throws NoSuchMethodException, SecurityException;
// This is used to implement getConstructors and // This is used to implement getConstructors and
@ -78,22 +198,87 @@ public final class Class implements Serializable
private native Constructor[] _getConstructors (boolean declared) private native Constructor[] _getConstructors (boolean declared)
throws SecurityException; throws SecurityException;
public Constructor[] getConstructors () throws SecurityException /**
* Get all the public constructors of this class. This returns an array of
* length 0 if there are no constructors, including for primitive types,
* arrays, and interfaces. It does, however, include the default
* constructor if one was supplied by the compiler. 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 constructors in this class
* @throws SecurityException if the security check fails
* @since 1.1
*/
public Constructor[] getConstructors()
throws SecurityException
{ {
return _getConstructors (false); return _getConstructors(false);
} }
public native Constructor getDeclaredConstructor (Class[] parameterTypes) /**
* Get a constructor declared in this class. If the constructor takes no
* argument, an array of zero elements and null are equivalent for the
* types argument. A security check may be performed, with
* <code>checkMemberAccess(this, Member.DECLARED)</code> as well as
* <code>checkPackageAccess</code> both having to succeed.
*
* @param types the type of each parameter
* @return the constructor
* @throws NoSuchMethodException if the constructor does not exist
* @throws SecurityException if the security check fails
* @see #getDeclaredConstructors()
* @since 1.1
*/
public native Constructor getDeclaredConstructor(Class[] args)
throws NoSuchMethodException, SecurityException; throws NoSuchMethodException, SecurityException;
public native Class[] getDeclaredClasses () throws SecurityException; /**
* Get all the declared member classes and interfaces in this class, but
* not those inherited from superclasses. This returns an array of length
* 0 if there are no member classes, including for primitive types. A
* security check may be performed, with
* <code>checkMemberAccess(this, Member.DECLARED)</code> as well as
* <code>checkPackageAccess</code> both having to succeed.
*
* @return all declared member classes in this class
* @throws SecurityException if the security check fails
* @since 1.1
*/
public native Class[] getDeclaredClasses() throws SecurityException;
public Constructor[] getDeclaredConstructors () throws SecurityException /**
* Get all the declared constructors of this class. This returns an array of
* length 0 if there are no constructors, including for primitive types,
* arrays, and interfaces. It does, however, include the default
* constructor if one was supplied by the compiler. A security check may
* be performed, with <code>checkMemberAccess(this, Member.DECLARED)</code>
* as well as <code>checkPackageAccess</code> both having to succeed.
*
* @return all constructors in this class
* @throws SecurityException if the security check fails
* @since 1.1
*/
public Constructor[] getDeclaredConstructors()
throws SecurityException
{ {
return _getConstructors (true); return _getConstructors(true);
} }
public native Field getDeclaredField (String fieldName) /**
* Get a field declared in this class, where name is its simple name. The
* implicit length field of arrays is not available. A security check may
* be performed, with <code>checkMemberAccess(this, Member.DECLARED)</code>
* as well as <code>checkPackageAccess</code> both having to succeed.
*
* @param name the name of the field
* @return the field
* @throws NoSuchFieldException if the field does not exist
* @throws SecurityException if the security check fails
* @see #getDeclaredFields()
* @since 1.1
*/
public native Field getDeclaredField(String fieldName)
throws NoSuchFieldException, SecurityException; throws NoSuchFieldException, SecurityException;
/** /**
@ -116,10 +301,30 @@ public final class Class implements Serializable
native Field[] getDeclaredFields (boolean publicOnly); native Field[] getDeclaredFields (boolean publicOnly);
private native Method _getDeclaredMethod (String methodName, private native Method _getDeclaredMethod(String methodName, Class[] args);
Class[] parameterTypes);
public Method getDeclaredMethod (String methodName, Class[] parameterTypes) /**
* Get a method declared in this class, where name is its simple name. The
* implicit methods of Object are not available from arrays or 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; 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
* <code>checkMemberAccess(this, Member.DECLARED)</code> as well as
* <code>checkPackageAccess</code> both having to succeed.
*
* @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
* @see #getDeclaredMethods()
* @since 1.1
*/
public Method getDeclaredMethod(String methodName, Class[] args)
throws NoSuchMethodException, SecurityException throws NoSuchMethodException, SecurityException
{ {
memberAccessCheck(Member.DECLARED); memberAccessCheck(Member.DECLARED);
@ -127,28 +332,66 @@ public final class Class implements Serializable
if ("<init>".equals(methodName) || "<clinit>".equals(methodName)) if ("<init>".equals(methodName) || "<clinit>".equals(methodName))
throw new NoSuchMethodException(methodName); throw new NoSuchMethodException(methodName);
Method m = _getDeclaredMethod(methodName, parameterTypes); Method match = _getDeclaredMethod(methodName, args);
if (m == null) if (match == null)
throw new NoSuchMethodException (methodName); throw new NoSuchMethodException(methodName);
return m; return match;
} }
/**
* Get all the declared methods in this class, but not those inherited from
* superclasses. This returns an array of length 0 if there are no methods,
* including for primitive types. This does include the implicit methods of
* arrays and 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.DECLARED)</code> as well as
* <code>checkPackageAccess</code> both having to succeed.
*
* @return all declared methods in this class
* @throws SecurityException if the security check fails
* @since 1.1
*/
public native Method[] getDeclaredMethods () throws SecurityException; public native Method[] getDeclaredMethods () throws SecurityException;
/**
* If this is a nested or inner class, return the class that declared it.
* If not, return null.
*
* @return the declaring class of this class
* @since 1.1
*/
// This is marked as unimplemented in the JCL book. // This is marked as unimplemented in the JCL book.
public native Class getDeclaringClass (); public native Class getDeclaringClass ();
private native Field getField (String fieldName, int hash) private native Field getField (String fieldName, int hash)
throws NoSuchFieldException, SecurityException; throws NoSuchFieldException, SecurityException;
public Field getField (String fieldName) /**
* Get a public field declared or inherited in this class, where name is
* its simple name. If the class contains multiple accessible fields by
* that name, an arbitrary one is returned. The implicit length field of
* arrays is not available. A security check may be performed, with
* <code>checkMemberAccess(this, Member.PUBLIC)</code> as well as
* <code>checkPackageAccess</code> both having to succeed.
*
* @param fieldName the name of the field
* @return the field
* @throws NoSuchFieldException if the field does not exist
* @throws SecurityException if the security check fails
* @see #getFields()
* @since 1.1
*/
public Field getField(String fieldName)
throws NoSuchFieldException, SecurityException throws NoSuchFieldException, SecurityException
{ {
memberAccessCheck (Member.PUBLIC); memberAccessCheck(Member.PUBLIC);
Field fld = getField(fieldName, fieldName.hashCode()); Field field = getField(fieldName, fieldName.hashCode());
if (fld == null) if (field == null)
throw new NoSuchFieldException(fieldName); throw new NoSuchFieldException(fieldName);
return fld; return field;
} }
/** /**
@ -191,6 +434,7 @@ public final class Class implements Serializable
* classloader of this class or when the classloader of this class * classloader of this class or when the classloader of this class
* is null. * is null.
* *
* @return the package for this class, if it is available
* @since 1.2 * @since 1.2
*/ */
public Package getPackage() public Package getPackage()
@ -205,19 +449,48 @@ public final class Class implements Serializable
pkg = name.substring(0, idx); pkg = name.substring(0, idx);
return cl.getPackage(pkg); return cl.getPackage(pkg);
} }
else return null;
return null;
} }
/**
* Get the interfaces this class <em>directly</em> implements, in the
* order that they were declared. This returns an empty array, not null,
* for Object, primitives, void, and classes or interfaces with no direct
* superinterface. Array types return Cloneable and Serializable.
*
* @return the interfaces this class directly implements
*/
public native Class[] getInterfaces (); public native Class[] getInterfaces ();
private final native void getSignature (StringBuffer buffer); private final native void getSignature(StringBuffer buffer);
private static final native String getSignature (Class[] parameterTypes, private static final native String getSignature(Class[] args,
boolean is_construtor); boolean is_construtor);
public native Method _getMethod (String methodName, Class[] parameterTypes); public native Method _getMethod(String methodName, Class[] args);
public Method getMethod (String methodName, Class[] parameterTypes) /**
* Get a public method declared or inherited in this class, where name is
* 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
* <code>checkMemberAccess(this, Member.PUBLIC)</code> as well as
* <code>checkPackageAccess</code> both having to succeed.
*
* @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
* @see #getMethods()
* @since 1.1
*/
public Method getMethod(String methodName, Class[] args)
throws NoSuchMethodException, SecurityException throws NoSuchMethodException, SecurityException
{ {
memberAccessCheck(Member.PUBLIC); memberAccessCheck(Member.PUBLIC);
@ -225,64 +498,243 @@ public final class Class implements Serializable
if ("<init>".equals(methodName) || "<clinit>".equals(methodName)) if ("<init>".equals(methodName) || "<clinit>".equals(methodName))
throw new NoSuchMethodException(methodName); throw new NoSuchMethodException(methodName);
Method m = _getMethod(methodName, parameterTypes); Method method = _getMethod(methodName, args);
if (m == null) if (method == null)
throw new NoSuchMethodException (methodName); throw new NoSuchMethodException(methodName);
return m; return method;
} }
private native int _getMethods (Method[] result, int offset); 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; 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 (); 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: &lt;dotted name&gt;
* class or interface, as element type: L&lt;dotted name&gt;;
*
* @return the name of this class
*/
public native String getName (); 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); String name = resourcePath(resourceName);
ClassLoader loader = getClassLoader (); ClassLoader loader = getClassLoader();
if (loader == null) if (loader == null)
return ClassLoader.getSystemResource (name); return ClassLoader.getSystemResource(name);
else return loader.getResource(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); String name = resourcePath(resourceName);
ClassLoader loader = getClassLoader (); ClassLoader loader = getClassLoader();
if (loader == null) if (loader == null)
return ClassLoader.getSystemResourceAsStream (name); return ClassLoader.getSystemResourceAsStream(name);
else return loader.getResourceAsStream(name);
return loader.getResourceAsStream (name);
} }
private String resourcePath (String resourceName) private String resourcePath(String resourceName)
{ {
if (resourceName.startsWith ("/")) if (resourceName.startsWith("/"))
return resourceName.substring (1); return resourceName.substring(1);
Class c = this; Class c = this;
while (c.isArray ()) while (c.isArray())
c = c.getComponentType (); c = c.getComponentType();
String packageName = c.getName ().replace ('.', '/'); String packageName = c.getName().replace('.', '/');
int end = packageName.lastIndexOf ('/'); int end = packageName.lastIndexOf('/');
if (end == -1) if (end != -1)
return resourceName; return packageName.substring(0, end + 1) + resourceName;
else return resourceName;
return packageName.substring (0, end+1) + 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 (); public native Object[] getSigners ();
/**
* Set the signers of this class.
*
* @param signers the signers of this class
*/
native void setSigners(Object[] signers); 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 (); 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 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 (); 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 (); 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 () public native Object newInstance ()
throws InstantiationException, IllegalAccessException; throws InstantiationException, IllegalAccessException;
@ -291,14 +743,15 @@ public final class Class implements Serializable
private native ProtectionDomain getProtectionDomain0(); private native ProtectionDomain getProtectionDomain0();
/** /**
* Returns the protection domain of this class. If the classloader * Returns the protection domain of this class. If the classloader did not
* did not record the protection domain when creating this class * record the protection domain when creating this class the unknown
* the unknown protection domain is returned which has a <code>null</code> * protection domain is returned which has a <code>null</code> code source
* code source and all permissions. * 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>. * does not have <code>RuntimePermission("getProtectionDomain")</code>.
* * @see RuntimePermission
* @since 1.2 * @since 1.2
*/ */
public ProtectionDomain getProtectionDomain() public ProtectionDomain getProtectionDomain()
@ -315,11 +768,18 @@ public final class Class implements Serializable
return protectionDomain; 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 ()) if (isPrimitive())
return getName (); return getName();
return (isInterface () ? "interface " : "class ") + getName (); return (isInterface() ? "interface " : "class ") + getName();
} }
/** /**
@ -391,17 +851,6 @@ public final class Class implements Serializable
return c.defaultAssertionStatus; 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). * Strip the last portion of the name (after the last dot).
* *