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/*
* $Id$
* Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
* For details on use and redistribution please refer to the
* LICENSE file included with these sources.
*/
package org.apache.fop.fo.pagination;
import org.apache.fop.fo.*;
import org.apache.fop.fo.properties.*;
import org.apache.fop.apps.FOPException;
/**
* Base PageMasterReference class. Provides implementation for handling the
* master-name attribute and containment within a PageSequenceMaster
*/
public abstract class PageMasterReference extends FObj
implements SubSequenceSpecifier {
private String _masterName;
private PageSequenceMaster _pageSequenceMaster;
public PageMasterReference(FObj parent, PropertyList propertyList)
throws FOPException {
super(parent, propertyList);
this.name = getElementName();
if (getProperty("master-name") != null) {
setMasterName(getProperty("master-name").getString());
}
validateParent(parent);
}
protected void setMasterName(String masterName) {
_masterName = masterName;
}
/**
* Returns the "master-name" attribute of this page master reference
*/
public String getMasterName() {
return _masterName;
}
protected void setPageSequenceMaster(PageSequenceMaster pageSequenceMaster) {
_pageSequenceMaster = pageSequenceMaster;
}
protected PageSequenceMaster getPageSequenceMaster() {
return _pageSequenceMaster;
}
public abstract String getNextPageMaster(int currentPageNumber,
boolean thisIsFirstPage,
boolean isEmptyPage);
/**
* Gets the formating object name for this object. Subclasses must provide this.
*
* @return the element name of this reference. e.g. fo:repeatable-page-master-reference
*/
protected abstract String getElementName();
/**
* Checks that the parent is the right element. The default implementation
* checks for fo:page-sequence-master
*/
protected void validateParent(FObj parent) throws FOPException {
if (parent.getName().equals("fo:page-sequence-master")) {
_pageSequenceMaster = (PageSequenceMaster)parent;
if (getMasterName() == null) {
log.warn("" + getElementName()
+ " does not have a master-name and so is being ignored");
} else {
_pageSequenceMaster.addSubsequenceSpecifier(this);
}
} else {
throw new FOPException(getElementName() + " must be"
+ "child of fo:page-sequence-master, not "
+ parent.getName());
}
}
public abstract void reset();
}
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