/*
* @(#)DefaultListModel.java 1.35 04/05/05
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package javax.swing;
import java.util.Vector;
import java.util.Enumeration;
import javax.swing.event.*;
/**
* This class loosely implements the <code>java.util.Vector</code>
* API, in that it implements the 1.1.x version of
* <code>java.util.Vector</code>, has no collection class support,
* and notifies the <code>ListDataListener</code>s when changes occur.
* Presently it delegates to a <code>Vector</code>,
* in a future release it will be a real Collection implementation.
* <p>
* <strong>Warning:</strong>
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is
* appropriate for short term storage or RMI between applications running
* the same version of Swing. As of 1.4, support for long term storage
* of all JavaBeans<sup><font size="-2">TM</font></sup>
* has been added to the <code>java.beans</code> package.
* Please see {@link java.beans.XMLEncoder}.
*
* @version 1.35 05/05/04
* @author Hans Muller
*/
public class DefaultListModel extends AbstractListModel
{
private Vector delegate = new Vector();
/**
* Returns the number of components in this list.
* <p>
* This method is identical to <code>size</code>, which implements the
* <code>List</code> interface defined in the 1.2 Collections framework.
* This method exists in conjunction with <code>setSize</code> so that
* <code>size</code> is identifiable as a JavaBean property.
*
* @return the number of components in this list
* @see #size()
*/
public int getSize() {
return delegate.size();
}
/**
* Returns the component at the specified index.
* <blockquote>
* <b>Note:</b> Although this method is not deprecated, the preferred
* method to use is <code>get(int)</code>, which implements the
* <code>List</code> interface defined in the 1.2 Collections framework.
* </blockquote>
* @param index an index into this list
* @return the component at the specified index
* @exception ArrayIndexOutOfBoundsException if the <code>index</code>
* is negative or greater than the current size of this
* list
* @see #get(int)
*/
public Object getElementAt(int index) {
return delegate.elementAt(index);
}
/**
* Copies the components of this list into the specified array.
* The array must be big enough to hold all the objects in this list,
* else an <code>IndexOutOfBoundsException</code> is thrown.
*
* @param anArray the array into which the components get copied
* @see Vector#copyInto(Object[])
*/
public void copyInto(Object anArray[]) {
delegate.copyInto(anArray);
}
/**
* Trims the capacity of this list to be the list's current size.
*
* @see Vector#trimToSize()
*/
public void trimToSize() {
delegate.trimToSize();
}
/**
* Increases the capacity of this list, if necessary, to ensure
* that it can hold at least the number of components specified by
* the minimum capacity argument.
*
* @param minCapacity the desired minimum capacity
* @see Vector#ensureCapacity(int)
*/
public void ensureCapacity(int minCapacity) {
delegate.ensureCapacity(minCapacity);
}
/**
* Sets the size of this list.
*
* @param newSize the new size of this list
* @see Vector#setSize(int)
*/
public void setSize(int newSize) {
int oldSize = delegate.size();
delegate.setSize(newSize);
if (oldSize > newSize) {
fireIntervalRemoved(this, newSize, oldSize-1);
}
else if (oldSize < newSize) {
fireIntervalAdded(this, oldSize, newSize-1);
}
}
/**
* Returns the current capacity of this list.
*
* @return the current capacity
* @see Vector#capacity()
*/
public int capacity() {
return delegate.capacity();
}
/**
* Returns the number of components in this list.
*
* @return the number of components in this list
* @see Vector#size()
*/
public int size() {
return delegate.size();
}
/**
* Tests whether this list has any components.
*
* @return <code>true</code> if and only if this list has
* no components, that is, its size is zero;
* <code>false</code> otherwise
* @see Vector#isEmpty()
*/
public boolean isEmpty() {
return delegate.isEmpty();
}
/**
* Returns an enumeration of the components of this list.
*
* @return an enumeration of the components of this list
* @see Vector#elements()
*/
public Enumeration<?> elements() {
return delegate.elements();
}
/**
* Tests whether the specified object is a component in this list.
*
* @param elem an object
* @return <code>true</code> if the specified object
* is the same as a component in this list
* @see Vector#contains(Object)
*/
public boolean contains(Object elem) {
return delegate.contains(elem);
}
/**
* Searches for the first occurrence of <code>elem</code>.
*
* @param elem an object
* @return the index of the first occurrence of the argument in this
* list; returns <code>-1</code> if the object is not found
* @see Vector#indexOf(Object)
*/
public int indexOf(Object elem) {
return delegate.indexOf(elem);
}
/**
* Searches for the first occurrence of <code>elem</code>, beginning
* the search at <code>index</code>.
*
* @param elem an desired component
* @param index the index from which to begin searching
* @return the index where the first occurrence of <code>elem</code>
* is found after <code>index</code>; returns <code>-1</code>
* if the <code>elem</code> is not found in the list
* @see Vector#indexOf(Object,int)
*/
public int indexOf(Object elem, int index) {
return delegate.indexOf(elem, index);
}
/**
* Returns the index of the last occurrence of <code>elem</code>.
*
* @param elem the desired component
* @return the index of the last occurrence of <code>elem</code>
* in the list; returns <code>-1</code> if the object is not found
* @see Vector#lastIndexOf(Object)
*/
public int lastIndexOf(Object elem) {
return delegate.lastIndexOf(elem);
}
/**
* Searches backwards for <code>elem</code>, starting from the
* specified index, and returns an index to it.
*
* @param elem the desired component
* @param index the index to start searching from
* @return the index of the last occurrence of the <code>elem</code>
* in this list at position less than <code>index</code>;
* returns <code>-1</code> if the object is not found
* @see Vector#lastIndexOf(Object,int)
*/
public int lastIndexOf(Object elem, int index) {
return delegate.lastIndexOf(elem, index);
}
/**
* Returns the component at the specified index.
* Throws an <code>ArrayIndexOutOfBoundsException</code> if the index
* is negative or not less than the size of the list.
* <blockquote>
* <b>Note:</b> Although this method is not deprecated, the preferred
* method to use is <code>get(int)</code>, which implements the
* <code>List</code> interface defined in the 1.2 Collections framework.
* </blockquote>
*
* @param index an index into this list
* @return the component at the specified index
* @see #get(int)
* @see Vector#elementAt(int)
*/
public Object elementAt(int index) {
return delegate.elementAt(index);
}
/**
* Returns the first component of this list.
* Throws a <code>NoSuchElementException</code> if this
* vector has no components.
* @return the first component of this list
* @see Vector#firstElement()
*/
public Object firstElement() {
return delegate.firstElement();
}
/**
* Returns the last component of the list.
* Throws a <code>NoSuchElementException</code> if this vector
* has no components.
*
* @return the last component of the list
* @see Vector#lastElement()
*/
public Object lastElement() {
return delegate.lastElement();
}
/**
* Sets the component at the specified <code>index</code> of this
* list to be the specified object. The previous component at that
* position is discarded.
* <p>
* Throws an <code>ArrayIndexOutOfBoundsException</code> if the index
* is invalid.
* <blockquote>
* <b>Note:</b> Although this method is not deprecated, the preferred
* method to use is <code>set(int,Object)</code>, which implements the
* <code>List</code> interface defined in the 1.2 Collections framework.
* </blockquote>
*
* @param obj what the component is to be set to
* @param index the specified index
* @see #set(int,Object)
* @see Vector#setElementAt(Object,int)
*/
public void setElementAt(Object obj, int index) {
delegate.setElementAt(obj, index);
fireContentsChanged(this, index, index);
}
/**
* Deletes the component at the specified index.
* <p>
* Throws an <code>ArrayIndexOutOfBoundsException</code> if the index
* is invalid.
* <blockquote>
* <b>Note:</b> Although this method is not deprecated, the preferred
* method to use is <code>remove(int)</code>, which implements the
* <code>List</code> interface defined in the 1.2 Collections framework.
* </blockquote>
*
* @param index the index of the object to remove
* @see #remove(int)
* @see Vector#removeElementAt(int)
*/
public void removeElementAt(int index) {
delegate.removeElementAt(index);
fireIntervalRemoved(this, index, index);
}
/**
* Inserts the specified object as a component in this list at the
* specified <code>index</code>.
* <p>
* Throws an <code>ArrayIndexOutOfBoundsException</code> if the index
* is invalid.
* <blockquote>
* <b>Note:</b> Although this method is not deprecated, the preferred
* method to use is <code>add(int,Object)</code>, which implements the
* <code>List</code> interface defined in the 1.2 Collections framework.
* </blockquote>
*
* @param obj the component to insert
* @param index where to insert the new component
* @exception ArrayIndexOutOfBoundsException if the index was invalid
* @see #add(int,Object)
* @see Vector#insertElementAt(Object,int)
*/
public void insertElementAt(Object obj, int index) {
delegate.insertElementAt(obj, index);
fireIntervalAdded(this, index, index);
}
/**
* Adds the specified component to the end of this list.
*
* @param obj the component to be added
* @see Vector#addElement(Object)
*/
public void addElement(Object obj) {
int index = delegate.size();
delegate.addElement(obj);
fireIntervalAdded(this, index, index);
}
/**
* Removes the first (lowest-indexed) occurrence of the argument
* from this list.
*
* @param obj the component to be removed
* @return <code>true</code> if the argument was a component of this
* list; <code>false</code> otherwise
* @see Vector#removeElement(Object)
*/
public boolean removeElement(Object obj) {
int index = indexOf(obj);
boolean rv = delegate.removeElement(obj);
if (index >= 0) {
fireIntervalRemoved(this, index, index);
}
return rv;
}
/**
* Removes all components from this list and sets its size to zero.
* <blockquote>
* <b>Note:</b> Although this method is not deprecated, the preferred
* method to use is <code>clear</code>, which implements the
* <code>List</code> interface defined in the 1.2 Collections framework.
* </blockquote>
*
* @see #clear()
* @see Vector#removeAllElements()
*/
public void removeAllElements() {
int index1 = delegate.size()-1;
delegate.removeAllElements();
if (index1 >= 0) {
fireIntervalRemoved(this, 0, index1);
}
}
/**
* Returns a string that displays and identifies this
* object's properties.
*
* @return a String representation of this object
*/
public String toString() {
return delegate.toString();
}
/* The remaining methods are included for compatibility with the
* Java 2 platform Vector class.
*/
/**
* Returns an array containing all of the elements in this list in the
* correct order.
*
* @return an array containing the elements of the list
* @see Vector#toArray()
*/
public Object[] toArray() {
Object[] rv = new Object[delegate.size()];
delegate.copyInto(rv);
return rv;
}
/**
* Returns the element at the specified position in this list.
* <p>
* Throws an <code>ArrayIndexOutOfBoundsException</code>
* if the index is out of range
* (<code>index < 0 || index >= size()</code>).
*
* @param index index of element to return
*/
public Object get(int index) {
return delegate.elementAt(index);
}
/**
* Replaces the element at the specified position in this list with the
* specified element.
* <p>
* Throws an <code>ArrayIndexOutOfBoundsException</code>
* if the index is out of range
* (<code>index < 0 || index >= size()</code>).
*
* @param index index of element to replace
* @param element element to be stored at the specified position
* @return the element previously at the specified position
*/
public Object set(int index, Object element) {
Object rv = delegate.elementAt(index);
delegate.setElementAt(element, index);
fireContentsChanged(this, index, index);
return rv;
}
/**
* Inserts the specified element at the specified position in this list.
* <p>
* Throws an <code>ArrayIndexOutOfBoundsException</code> if the
* index is out of range
* (<code>index < 0 || index > size()</code>).
*
* @param index index at which the specified element is to be inserted
* @param element element to be inserted
*/
public void add(int index, Object element) {
delegate.insertElementAt(element, index);
fireIntervalAdded(this, index, index);
}
/**
* Removes the element at the specified position in this list.
* Returns the element that was removed from the list.
* <p>
* Throws an <code>ArrayIndexOutOfBoundsException</code>
* if the index is out of range
* (<code>index < 0 || index >= size()</code>).
*
* @param index the index of the element to removed
*/
public Object remove(int index) {
Object rv = delegate.elementAt(index);
delegate.removeElementAt(index);
fireIntervalRemoved(this, index, index);
return rv;
}
/**
* Removes all of the elements from this list. The list will
* be empty after this call returns (unless it throws an exception).
*/
public void clear() {
int index1 = delegate.size()-1;
delegate.removeAllElements();
if (index1 >= 0) {
fireIntervalRemoved(this, 0, index1);
}
}
/**
* Deletes the components at the specified range of indexes.
* The removal is inclusive, so specifying a range of (1,5)
* removes the component at index 1 and the component at index 5,
* as well as all components in between.
* <p>
* Throws an <code>ArrayIndexOutOfBoundsException</code>
* if the index was invalid.
* Throws an <code>IllegalArgumentException</code> if
* <code>fromIndex > toIndex</code>.
*
* @param fromIndex the index of the lower end of the range
* @param toIndex the index of the upper end of the range
* @see #remove(int)
*/
public void removeRange(int fromIndex, int toIndex) {
if (fromIndex > toIndex) {
throw new IllegalArgumentException("fromIndex must be <= toIndex");
}
for(int i = toIndex; i >= fromIndex; i--) {
delegate.removeElementAt(i);
}
fireIntervalRemoved(this, fromIndex, toIndex);
}
/*
public void addAll(Collection c) {
}
public void addAll(int index, Collection c) {
}
*/
}
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