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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.datatypes.PercentBase;
- import org.apache.fop.fo.properties.Property;
- import org.apache.fop.fo.properties.StringProperty;
-
- /**
- * Abstract Base class for XSL-FO functions
- */
- public abstract class FunctionBase implements Function {
-
- /** {@inheritDoc} */
- public int getOptionalArgsCount() {
- return 0;
- }
-
- /** {@inheritDoc} */
- public Property getOptionalArgDefault(int index, PropertyInfo pi) throws PropertyException {
- if (index >= getOptionalArgsCount()) {
- PropertyException e = new PropertyException(
- new IndexOutOfBoundsException("illegal optional argument index"));
- e.setPropertyInfo(pi);
- throw e;
- } else {
- return null;
- }
- }
-
- /** {@inheritDoc} */
- public boolean hasVariableArgs() {
- return false;
- }
-
- /** {@inheritDoc} */
- public PercentBase getPercentBase() {
- return null;
- }
-
- /**
- * @param pi property information instance that applies to property being evaluated
- * @return string property whose value is name of property being evaluated
- */
- protected final Property getPropertyName(PropertyInfo pi) {
- return StringProperty.getInstance(pi.getPropertyMaker().getName());
- }
- }
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