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/*******************************************************************************
* Copyright (c) 2009 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.model.event;
import org.eclipse.jpt.common.utility.model.Model;
/**
* A "list move" event gets delivered whenever a model moves the elements in
* a "bound" or "constrained" list. A <code>ListMoveEvent</code> is sent
* as an argument to the {@link org.eclipse.jpt.common.utility.model.listener.ListChangeListener}.
* <p>
* Provisional API: This class is part of an interim API that is still
* under development and expected to change significantly before reaching
* stability. It is available at this early stage to solicit feedback from
* pioneering adopters on the understanding that any code that uses this API
* will almost certainly be broken (repeatedly) as the API evolves.
*/
public final class ListMoveEvent extends ListEvent {
/** The index to which the items were moved. */
private final int targetIndex;
/** The index from which the items were moved. */
private final int sourceIndex;
/** The number of items moved. */
private final int length;
private static final long serialVersionUID = 1L;
// ********** constructor **********
/**
* Construct a new list move event.
*
* @param source The object on which the event initially occurred.
* @param listName The programmatic name of the list that was changed.
* @param targetIndex The index to which the items were moved.
* @param sourceIndex The index from which the items were moved.
* @param length The number of items moved.
*/
public ListMoveEvent(Model source, String listName, int targetIndex, int sourceIndex, int length) {
super(source, listName);
this.targetIndex = targetIndex;
this.sourceIndex = sourceIndex;
this.length = length;
}
// ********** standard state **********
/**
* Return the index to which the items were moved.
*/
public int getTargetIndex() {
return this.targetIndex;
}
/**
* Return the index from which the items were moved.
*/
public int getSourceIndex() {
return this.sourceIndex;
}
/**
* Return the number of items moved.
*/
public int getLength() {
return this.length;
}
@Override
protected void toString(StringBuilder sb) {
super.toString(sb);
sb.append(": "); //$NON-NLS-1$
sb.append(this.sourceIndex);
sb.append(" => "); //$NON-NLS-1$
sb.append(this.targetIndex);
sb.append(" length="); //$NON-NLS-1$
sb.append(this.length);
}
// ********** cloning **********
/**
* Return a copy of the event with the specified source
* replacing the current source.
*/
public ListMoveEvent clone(Model newSource) {
return this.clone(newSource, this.listName);
}
/**
* Return a copy of the event with the specified source and list name
* replacing the current source and list name.
*/
public ListMoveEvent clone(Model newSource, String newListName) {
return this.clone(newSource, newListName, 0);
}
/**
* Return a copy of the event with the specified source and list name
* replacing the current source and list name and displacing
* the index by the specified amount.
*/
public ListMoveEvent clone(Model newSource, String newListName, int offset) {
return new ListMoveEvent(newSource, newListName, this.targetIndex + offset, this.sourceIndex + offset, this.length);
}
}
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