logicalfunction.java

java 读写word excel ppt

/*
* 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.
*/
/*
 * Created on Nov 25, 2006
 *
 */
package org.apache.poi.hssf.record.formula.functions;

import org.apache.poi.hssf.record.formula.eval.RefEval;
import org.apache.poi.hssf.record.formula.eval.ValueEval;

/**
 * @author Amol S. Deshmukh < amolweb at ya hoo dot com >
 *
 */
public abstract class LogicalFunction implements Function {

    /**
     * recursively evaluate any RefEvals
     * @param reval
     * @return
     */
    protected ValueEval xlateRefEval(RefEval reval) {
        ValueEval retval = (ValueEval) reval.getInnerValueEval();
        
        if (retval instanceof RefEval) {
            RefEval re = (RefEval) retval;
            retval = xlateRefEval(re);
        }

        return retval;
    }
}