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/*
* Copyright 1999-2005 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.properties;
import java.util.Iterator;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.expr.PropertyException;
/**
* Generic shorthand parser for ListProperties
*/
public class GenericShorthandParser implements ShorthandParser {
/**
* Constructor.
*/
public GenericShorthandParser() {
}
/**
* @param list the ListProperty
* @param index the index into the List of properties
* @return the property from the List of properties at the index parameter
*/
protected Property getElement(Property list, int index) {
if (list.getList().size() > index) {
return (Property) list.getList().get(index);
} else {
return null;
}
}
/**
* @see org.apache.fop.fo.properties.ShorthandParser#getValueForProperty()
*/
public Property getValueForProperty(int propId,
Property property,
PropertyMaker maker,
PropertyList propertyList)
throws PropertyException {
// Check for keyword "inherit"
if (property.getList().size() == 1) {
String sval = getElement(property, 0).getString();
if (sval != null && sval.equals("inherit")) {
return propertyList.getFromParent(propId);
}
}
return convertValueForProperty(propId, property, maker, propertyList);
}
/**
* Converts a property name into a Property
* @param propId the property ID in the Constants interface
* @param maker the Property.Maker to be used in the conversion
* @param property ...
* @param propertyList the PropertyList from which the Property should be
* extracted
* @return the Property matching the parameters, or null if not found
* @throws PropertyException (when?)
*/
protected Property convertValueForProperty(int propId,
Property property,
PropertyMaker maker,
PropertyList propertyList)
throws PropertyException {
Property prop = null;
// Try each of the stored values in turn
Iterator iprop = property.getList().iterator();
while (iprop.hasNext() && prop == null) {
Property p = (Property)iprop.next();
prop = maker.convertShorthandProperty(propertyList, p, null);
}
return prop;
}
}
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