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/*
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.xwiki.rendering.block;
import java.util.Collections;
import java.util.List;
import org.xwiki.rendering.listener.Listener;
import org.xwiki.rendering.listener.MetaData;
import org.xwiki.rendering.util.IdGenerator;
/**
* Contains the full tree of {@link Block} that represent a XWiki Document's content.
*
* @version $Id$
* @since 1.5M2
*/
public class XDOM extends MetaDataBlock
{
/**
* Constructs an empty XDOM. Useful for example when calling a macro that doesn't use the XDOM parameter passed to
* it.
*/
public static final XDOM EMPTY = new XDOM(Collections.<Block>emptyList());
/**
* Stateful id generator for this document. We store it in the XDOM because it is the only object which remains the
* same between parsing, transformation and rendering, and we need to generate ids during parsing and during
* transformation.
*/
private transient IdGenerator idGenerator;
/**
* @param childBlocks the list of children blocks of the block to construct
* @see AbstractBlock#AbstractBlock(List)
*/
public XDOM(List<? extends Block> childBlocks)
{
this(childBlocks, new IdGenerator(), MetaData.EMPTY);
}
/**
* @param childBlocks the list of children blocks of the block to construct
* @param metaData the meta data to add for this block
* @see AbstractBlock#AbstractBlock(List)
*/
public XDOM(List<? extends Block> childBlocks, MetaData metaData)
{
this(childBlocks, new IdGenerator(), metaData);
}
/**
* @param childBlocks the list of children blocks of the block to construct
* @param idGenerator a stateful id generator for this document
*/
public XDOM(List<? extends Block> childBlocks, IdGenerator idGenerator)
{
this(childBlocks, idGenerator, MetaData.EMPTY);
}
/**
* @param childBlocks the list of children blocks of the block to construct
* @param metaData the meta data to add for this block
* @param idGenerator a stateful id generator for this document
* @see AbstractBlock#AbstractBlock(List)
*/
public XDOM(List<? extends Block> childBlocks, IdGenerator idGenerator, MetaData metaData)
{
super(childBlocks, metaData);
this.idGenerator = idGenerator;
}
/**
* @return a stateful id generator for the whole document.
*/
public IdGenerator getIdGenerator()
{
return this.idGenerator;
}
/**
* @param idGenerator a stateful id generator for the whole document.
* @since 2.1M1
*/
public void setIdGenerator(IdGenerator idGenerator)
{
this.idGenerator = idGenerator;
}
@Override
public void before(Listener listener)
{
listener.beginDocument(getMetaData());
}
@Override
public void after(Listener listener)
{
listener.endDocument(getMetaData());
}
@Override
public XDOM clone()
{
XDOM clone = (XDOM) super.clone();
// The cloned XDOM should not increment the current id generator
if (this.idGenerator != null) {
clone.idGenerator = new IdGenerator(this.idGenerator);
}
return clone;
}
}