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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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.expr;
-
- import org.apache.fop.fo.FOPropertyMapping;
- import org.apache.fop.fo.properties.Property;
-
- /**
- * Class modelling the from-nearest-specified-value function. See Sec. 5.10.4
- * of the XSL-FO standard.
- */
- public class NearestSpecPropFunction extends FunctionBase {
-
- /** {@inheritDoc} */
- public int getRequiredArgsCount() {
- return 0;
- }
-
- @Override
- /** {@inheritDoc} */
- public int getOptionalArgsCount() {
- return 1;
- }
-
- @Override
- /** {@inheritDoc} */
- public Property getOptionalArgDefault(int index, PropertyInfo pi) throws PropertyException {
- if ( index == 0 ) {
- return getPropertyName ( pi );
- } else {
- return super.getOptionalArgDefault ( index, pi );
- }
- }
-
- /** {@inheritDoc} */
- public Property eval(Property[] args, PropertyInfo pInfo) throws PropertyException {
- String propName = args[0].getString();
- if (propName == null) {
- throw new PropertyException(
- "Incorrect parameter to from-nearest-specified-value function");
- }
- // NOTE: special cases for shorthand property
- // Should return COMPUTED VALUE
- int propId = FOPropertyMapping.getPropertyId(propName);
- if (propId < 0) {
- throw new PropertyException(
- "Unknown property name used with inherited-property-value function: "
- + propName);
- }
- return pInfo.getPropertyList().getNearestSpecified(propId);
- }
-
- }
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