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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.
- ==================================================================== */
-
- package org.apache.poi.ss.formula.udf;
-
- import org.apache.poi.ss.formula.functions.FreeRefFunction;
-
- import java.util.ArrayList;
- import java.util.Arrays;
- import java.util.Collection;
-
- /**
- * Collects add-in libraries and VB macro functions together into one UDF finder
- *
- * @author PUdalau
- */
- public class AggregatingUDFFinder implements UDFFinder {
-
- private final Collection<UDFFinder> _usedToolPacks;
-
- public AggregatingUDFFinder(UDFFinder ... usedToolPacks) {
- _usedToolPacks = new ArrayList<UDFFinder>(usedToolPacks.length);
- _usedToolPacks.addAll(Arrays.asList(usedToolPacks));
- }
-
- /**
- * Returns executor by specified name. Returns <code>null</code> if
- * function isn't contained by any registered tool pack.
- *
- * @param name Name of function.
- * @return Function executor. <code>null</code> if not found
- */
- public FreeRefFunction findFunction(String name) {
- FreeRefFunction evaluatorForFunction;
- for (UDFFinder pack : _usedToolPacks) {
- evaluatorForFunction = pack.findFunction(name);
- if (evaluatorForFunction != null) {
- return evaluatorForFunction;
- }
- }
- return null;
- }
-
- /**
- * Add a new toolpack
- *
- * @param toolPack the UDF toolpack to add
- */
- public void add(UDFFinder toolPack){
- _usedToolPacks.add(toolPack);
- }
- }
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