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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.fo.pagination;
// SAX
import org.xml.sax.Attributes;
// FOP
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FObj;
import org.apache.fop.apps.FOPException;
import org.apache.fop.fo.FOTreeVisitor;
/**
* Base PageMasterReference class. Provides implementation for handling the
* master-reference attribute and containment within a PageSequenceMaster
*/
public abstract class PageMasterReference extends FObj
implements SubSequenceSpecifier {
private String masterName;
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
public PageMasterReference(FONode parent) {
super(parent);
}
/**
* @see org.apache.fop.fo.FObj#addProperties
*/
protected void addProperties(Attributes attlist) throws FOPException {
super.addProperties(attlist);
if (getProperty(PR_MASTER_REFERENCE) != null) {
this.masterName = getProperty(PR_MASTER_REFERENCE).getString();
}
validateParent(parent);
}
/**
* Returns the "master-reference" attribute of this page master reference
* @return the name of the page master
*/
public String getMasterName() {
return masterName;
}
/**
* Checks that the parent is the right element. The default implementation
* checks for fo:page-sequence-master.
* @param parent parent node
* @throws FOPException If the parent is invalid.
*/
protected void validateParent(FONode parent) throws FOPException {
if (parent.getName().equals("fo:page-sequence-master")) {
PageSequenceMaster pageSequenceMaster = (PageSequenceMaster)parent;
if (getMasterName() == null) {
getLogger().warn(getName()
+ " does not have a master-reference and so is being ignored");
} else {
pageSequenceMaster.addSubsequenceSpecifier(this);
}
} else {
throw new FOPException(getName() + " must be"
+ "child of fo:page-sequence-master, not "
+ parent.getName());
}
}
public void acceptVisitor(FOTreeVisitor fotv) {
fotv.servePageMasterReference(this);
}
}
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