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/*******************************************************************************
* Copyright (c) 2001, 2008 Oracle Corporation and others.
* 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 Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsf.common.dom;
import org.w3c.dom.Node;
/**
* Generic adapter for DOM attribute structures.
*
* @author cbateman
*
* <p>
* <b>Provisional API - subject to change</b>
* </p>
*/
public abstract class AttrDOMAdapter extends DOMAdapter
{
private AttributeIdentifier _attributeId; // lazily instantiated.
private final ElementDOMAdapter _owner;
/**
* @param owner
*/
protected AttrDOMAdapter(final ElementDOMAdapter owner)
{
_owner = owner;
}
/**
* The default implementation always returns the owner specified in the
* constructor.
*
* @return the element that owns this attribute
*/
public ElementDOMAdapter getOwningElement()
{
return _owner;
}
/**
* @return the value of the attribute. May return null if the attribute has
* no value.
*/
public abstract String getValue();
@Override
public final short getNodeType()
{
return Node.ATTRIBUTE_NODE;
}
/**
* @return the attribute identifier
*/
public final AttributeIdentifier getAttributeIdentifier()
{
synchronized (this)
{
if (_attributeId == null)
{
_attributeId = new MyAttributeIdentifier();
}
}
return _attributeId;
}
private class MyAttributeIdentifier extends AttributeIdentifier
{
@Override
public String getName()
{
return AttrDOMAdapter.this.getLocalName();
}
@Override
public TagIdentifier getTagIdentifier()
{
return getOwningElement().getTagId();
}
}
}
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