1 files changed, 210 insertions, 0 deletions
diff --git a/xmerge/source/xmerge/java/org/openoffice/xmerge/merger/diff/ObjectArrayIterator.java b/xmerge/source/xmerge/java/org/openoffice/xmerge/merger/diff/ObjectArrayIterator.java
new file mode 100644
index 000000000000..d52b53fd78a7
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+++ b/xmerge/source/xmerge/java/org/openoffice/xmerge/merger/diff/ObjectArrayIterator.java
@@ -0,0 +1,210 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+package org.openoffice.xmerge.merger.diff;
+
+import org.openoffice.xmerge.merger.Iterator;
+
+/**
+ *  <p>This is an implementation of the <code>Iterator</code> interface.
+ *  It is based upon a simple <code>Object</code> array.</p>
+ *
+ * <p>Note: this class is not thread safe for performance reasons.</p>
+ *
+ *  @author smak
+ */
+public final class ObjectArrayIterator implements Iterator {
+
+
+    /**
+     *  The <code>Object</code> array.
+     */
+    private Object [] objArray;
+    private int currentPosition;
+
+
+    /**
+     *  Private default constructor.
+     */
+    private ObjectArrayIterator() {
+        // do not allow user new a ObjectArrayIterator without argument
+    }
+
+
+    /**
+     *  Standard constructor.
+     *
+     *  @param  objArray  The <code>Object</code> array.
+     */
+    public ObjectArrayIterator(Object [] objArray) {
+        if (objArray != null) {
+            this.objArray = new Object[objArray.length];
+            System.arraycopy(objArray, 0, this.objArray, 0, objArray.length);
+            currentPosition = 0;
+        } else {
+            this.objArray = new Object[0];
+        }
+    }
+
+
+    public Object next() {
+        if (currentPosition < objArray.length - 1) {
+            currentPosition++;
+            return currentElement();
+        } else {
+            return null;
+        }
+
+    }
+
+
+    public Object previous() {
+        if (currentPosition > 0) {
+            currentPosition--;
+            return currentElement();
+        } else {
+            return null;
+        }
+    }
+
+
+    public Object start() {
+        currentPosition = 0;
+        return currentElement();
+    }
+
+
+    public Object end() {
+        if (objArray.length > 0) {
+            currentPosition = objArray.length - 1;
+        }
+        return currentElement();
+    }
+
+
+    public Object currentElement() {
+        if (objArray.length > 0) {
+            return objArray[currentPosition];
+        } else {
+            return null;
+        }
+    }
+
+
+    /**
+     *  Replace current <code>Object</code>.
+     *
+     *  @param  object  <code>Object</code> to replace.
+     */
+    public void replace(Object object) {
+        objArray[currentPosition] = object;
+    }
+
+
+    /**
+     *  Insert <code>Object</code> after current <code>Object</code>.
+     *
+     *  @param  object  <code>Object</code> to insert.
+     */
+    public void insert(Object object) {
+        Object [] objArray2 = new Object[objArray.length+1];
+
+        // copy the array content up before the currentposition
+        if (currentPosition > 0) {
+            System.arraycopy(objArray, 0, objArray2, 0, currentPosition);
+        }
+
+        objArray2[currentPosition] = object;
+
+        // copy the array content up after the currentposition
+        System.arraycopy(objArray, currentPosition, objArray2,
+                   currentPosition + 1, objArray.length - currentPosition);
+
+        objArray = objArray2;
+        currentPosition++;
+    }
+
+    /**
+     *  Append <code>Object</code> after current <code>Object</code>.
+     *
+     *  @param  object  <code>Object</code> to append.
+     */
+    public void append(Object object) {
+        Object [] objArray2 = new Object[objArray.length + 1];
+
+        int newPosition = currentPosition + 1;
+
+        // copy the array content up to the currentposition
+        System.arraycopy(objArray, 0, objArray2, 0, newPosition);
+
+        objArray2[newPosition] = object;
+
+        // copy the array content up after the currentposition
+        if (currentPosition < objArray.length - 1) {
+            System.arraycopy(objArray, newPosition, objArray2,
+                   newPosition + 1, objArray.length - newPosition);
+        }
+
+        objArray = objArray2;
+    }
+
+    /**
+     *  Remove current <code>Object</code>.
+     */
+    public void remove() {
+        Object [] objArray2 = new Object[objArray.length - 1];
+
+        // copy the array content up before the currentposition
+        if (currentPosition > 0) {
+            System.arraycopy(objArray, 0, objArray2, 0, currentPosition);
+        }
+
+        // copy the array content up after the currentposition
+        if (currentPosition < objArray.length - 1) {
+            System.arraycopy(objArray, currentPosition + 1, objArray2,
+                   currentPosition, objArray.length - currentPosition - 1);
+        }
+
+        objArray = objArray2;
+
+        if (currentPosition == objArray.length)
+            currentPosition--;
+    }
+
+    public int elementCount() {
+        return objArray.length;
+    }
+
+    public boolean equivalent(Object obj1, Object obj2) {
+        return obj1.equals(obj2);
+    }
+
+    public void refresh() {
+        // do nothing
+    }
+}
+