78 lines
2.4 KiB
Java
78 lines
2.4 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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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/*
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* Created on May 8, 2005
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*
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*/
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package org.apache.poi.hssf.record.formula.eval;
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import org.apache.poi.hssf.record.formula.ConcatPtg;
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import org.apache.poi.hssf.record.formula.Ptg;
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/**
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* @author Amol S. Deshmukh < amolweb at ya hoo dot com >
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*
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*/
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public class ConcatEval extends StringOperationEval {
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private ConcatPtg delegate;
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public ConcatEval(Ptg ptg) {
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this.delegate = (ConcatPtg) ptg;
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}
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public Eval evaluate(Eval[] operands, int srcRow, short srcCol) {
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Eval retval = null;
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StringBuffer sb = null;
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switch (operands.length) {
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default: // paranoid check :)
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retval = ErrorEval.UNKNOWN_ERROR;
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break;
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case 2:
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sb = new StringBuffer();
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for (int i = 0, iSize = 2; retval == null && i < iSize; i++) {
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ValueEval ve = singleOperandEvaluate(operands[i], srcRow, srcCol);
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if (ve instanceof StringValueEval) {
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StringValueEval sve = (StringValueEval) ve;
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sb.append(sve.getStringValue());
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}
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else if (ve instanceof BlankEval) {
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// do nothing
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}
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else { // must be an error eval
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retval = ve;
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}
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}
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}
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if (retval == null) {
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retval = new StringEval(sb.toString());
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}
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return retval;
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}
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public int getNumberOfOperands() {
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return delegate.getNumberOfOperands();
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}
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public int getType() {
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return delegate.getType();
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}
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}
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