Initial revision

From-SVN: r26263

libjava/java/text/BreakIterator.java

@@ -0,0 +1,160 @@
+// BreakIterator.java - Iterate over logical breaks in text.
+
+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.text;
+
+import java.io.Serializable;
+import java.util.Locale;
+import java.util.MissingResourceException;
+import java.util.ResourceBundle;
+
+/**
+ * @author Tom Tromey <tromey@cygnus.com>
+ * @date March 19, 1999
+ */
+/* Written using "Java Class Libraries", 2nd edition, plus online
+ * API docs for JDK 1.2 beta from http://www.javasoft.com.
+ * Status:  Believed complete and correct to 1.1.
+ */
+
+public abstract class BreakIterator implements Cloneable, Serializable
+{
+  // The value was discovered by writing a test program.
+  public static final int DONE = -1;
+
+  protected BreakIterator ()
+  {
+  }
+
+  public abstract int current ();
+  public abstract int first ();
+  public abstract int following (int pos);
+
+  public static synchronized Locale[] getAvailableLocales ()
+  {
+    // FIXME.
+    return null;
+  }
+
+  private static BreakIterator getInstance (String type, Locale loc)
+  {
+    String className;
+    try
+      {
+	ResourceBundle res
+	  = ResourceBundle.getBundle("gnu.gcj.text.LocaleData", loc);
+	className = res.getString(type);
+      }
+    catch (MissingResourceException x)
+      {
+	return null;
+      }
+    try
+      {
+	Class k = Class.forName(className);
+	return (BreakIterator) k.newInstance();
+      }
+    catch (ClassNotFoundException x1)
+      {
+	return null;
+      }
+    catch (InstantiationException x2)
+      {
+	return null;
+      }
+    catch (IllegalAccessException x3)
+      {
+	return null;
+      }
+  }
+
+  public static BreakIterator getCharacterInstance ()
+  {
+    return getCharacterInstance (Locale.getDefault());
+  }
+
+  public static BreakIterator getCharacterInstance (Locale loc)
+  {
+    BreakIterator r = getInstance ("CharacterIterator", loc);
+    if (r == null)
+      r = new gnu.gcj.text.CharacterBreakIterator ();
+    return r;
+  }
+
+  public static BreakIterator getLineInstance ()
+  {
+    return getLineInstance (Locale.getDefault());
+  }
+
+  public static BreakIterator getLineInstance (Locale loc)
+  {
+    BreakIterator r = getInstance ("LineIterator", loc);
+    if (r == null)
+      r = new gnu.gcj.text.LineBreakIterator ();
+    return r;
+  }
+
+  public static BreakIterator getSentenceInstance ()
+  {
+    return getSentenceInstance (Locale.getDefault());
+  }
+
+  public static BreakIterator getSentenceInstance (Locale loc)
+  {
+    BreakIterator r = getInstance ("SentenceIterator", loc);
+    if (r == null)
+      r = new gnu.gcj.text.SentenceBreakIterator ();
+    return r;
+  }
+
+  public abstract CharacterIterator getText ();
+
+  public static BreakIterator getWordInstance ()
+  {
+    return getWordInstance (Locale.getDefault());
+  }
+
+  public static BreakIterator getWordInstance (Locale loc)
+  {
+    BreakIterator r = getInstance ("WordIterator", loc);
+    if (r == null)
+      r = new gnu.gcj.text.WordBreakIterator ();
+    return r;
+  }
+
+  public boolean isBoundary (int pos)
+  {
+    if (pos == 0)
+      return true;
+    return following (pos - 1) == pos;
+  }
+
+  public abstract int last ();
+  public abstract int next ();
+  public abstract int next (int n);
+
+  public int preceding (int pos)
+  {
+    if (following (pos) == DONE)
+      last ();
+    while (previous () >= pos)
+      ;
+    return current ();
+  }
+
+  public abstract int previous ();
+
+  public void setText (String newText)
+  {
+    setText (new StringCharacterIterator (newText));
+  }
+
+  public abstract void setText (CharacterIterator newText);
+}