/*
* 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.hssf.record.formula.eval;
import org.apache.poi.hssf.usermodel.HSSFErrorConstants;
/**
* @author Amol S. Deshmukh < amolweb at ya hoo dot com >
*
*/
public final class ErrorEval {
// POI internal error codes
private static final int CIRCULAR_REF_ERROR_CODE = 0xFFFFFFC4;
private static final int FUNCTION_NOT_IMPLEMENTED_CODE = 0xFFFFFFE2;
/**
* Converts error codes to text. Handles non-standard error codes OK.
* For debug/test purposes (and for formatting error messages).
* @return the String representation of the specified Excel error code.
*/
public static String getText(int errorCode) {
if(HSSFErrorConstants.isValidCode(errorCode)) {
return HSSFErrorConstants.getText(errorCode);
}
// It is desirable to make these (arbitrary) strings look clearly different from any other
// value expression that might appear in a formula. In addition these error strings should
// look unlike the standard Excel errors. Hence tilde ('~') was used.
switch(errorCode) {
case CIRCULAR_REF_ERROR_CODE: return "~CIRCULAR~REF~";
case FUNCTION_NOT_IMPLEMENTED_CODE: return "~FUNCTION~NOT~IMPLEMENTED~";
}
return "~non~std~err(" + errorCode + ")~";
}
private int _errorCode;
/**
* @param errorCode an 8-bit value
*/
private ErrorEval(int errorCode) {
_errorCode = errorCode;
}
public String toString() {
StringBuffer sb = new StringBuffer(64);
sb.append(getClass().getName()).append(" [");
sb.append(getText(_errorCode));
sb.append("]");
return sb.toString();
}
}