| /* |
| * 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()); |
| } |
| } |