53 lines
1.9 KiB
Java
53 lines
1.9 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hssf.record.formula.udf;
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import org.apache.poi.hssf.record.formula.functions.FreeRefFunction;
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/**
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* Collects add-in libraries and VB macro functions together into one UDF finder
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*
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* @author PUdalau
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*/
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public final class AggregatingUDFFinder implements UDFFinder {
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private final UDFFinder[] _usedToolPacks;
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public AggregatingUDFFinder(UDFFinder ... usedToolPacks) {
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_usedToolPacks = usedToolPacks.clone();
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}
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/**
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* Returns executor by specified name. Returns <code>null</code> if
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* function isn't contained by any registered tool pack.
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*
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* @param name Name of function.
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* @return Function executor. <code>null</code> if not found
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*/
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public FreeRefFunction findFunction(String name) {
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FreeRefFunction evaluatorForFunction;
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for (UDFFinder pack : _usedToolPacks) {
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evaluatorForFunction = pack.findFunction(name);
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if (evaluatorForFunction != null) {
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return evaluatorForFunction;
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}
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}
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return null;
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}
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}
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