/*
* 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.
*/
//
/**
* @author Xiping Wang
* @modified Neeraj Joshi
*
*/
package org.apache.imperius.spl.parser.expressions.impl;
import java.util.List;
import java.util.logging.Logger;
import org.apache.imperius.spl.core.Expression;
import org.apache.imperius.spl.core.TypeConstants;
import org.apache.imperius.spl.core.TypeInfo;
import org.apache.imperius.spl.parser.exceptions.SPLException;
import org.apache.imperius.spl.parser.expressions.StringExpression;
import org.apache.imperius.spl.parser.util.TypeInfoImpl;
import org.apache.imperius.spl.parser.util.TypeResolver;
import org.apache.imperius.util.Messages;
import org.apache.imperius.util.SPLLogger;
public class Substring implements StringExpression
{
public static final String className = Substring.class.getName();
private Expression _lhsExp;
private Expression _midExp;
private Expression _rhsExp;
private TypeInfo _dataType= new TypeInfoImpl();;
private boolean _isArray = false;
private static Logger logger = SPLLogger.getSPLLogger().getLogger();
private static final String sourceClass="Substring";
public boolean isArray()
{
logger.entering(sourceClass,Thread.currentThread().getName()+" "+ "isArray");
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "isArray");
return _isArray;
}
public Substring(List exprList, boolean validateExpression)
throws SPLException
{
logger.entering(sourceClass,Thread.currentThread().getName()+" "+ "Substring");
if (exprList != null)
{
if (exprList.size() == 3)
{
Expression l = (Expression) exprList.get(0);
Expression m = (Expression) exprList.get(1);
Expression r = (Expression) exprList.get(2);
if (l == null)
{
logger.severe(
"left hand side expression passed in is null.");
throw new IllegalArgumentException(Messages.getString("SPL_PASSED_EXPRESSION_ERROR_MSG", new Object[]{"left hand"}));
}
if (m == null)
{
logger.severe(
"middle expression passed in is null.");
throw new IllegalArgumentException(Messages.getString("SPL_PASSED_EXPRESSION_ERROR_MSG", new Object[]{"middle"})); }
if (r == null)
{
logger.severe(
"right hand side expression passed in is null.");
throw new IllegalArgumentException(Messages.getString("SPL_PASSED_EXPRESSION_ERROR_MSG", new Object[]{"right hand"})); }
this._lhsExp = l;
this._midExp = m;
this._rhsExp = r;
}
else if (exprList.size() == 2)
{
Expression l = (Expression) exprList.get(0);
Expression m = (Expression) exprList.get(1);
if (l == null)
{
logger.severe(
"left hand side expression passed in is null.");
throw new IllegalArgumentException(Messages.getString("SPL_PASSED_EXPRESSION_ERROR_MSG", new Object[]{"left hand"})); }
if (m == null)
{
logger.severe(
"middle expression passed in is null.");
throw new IllegalArgumentException(Messages.getString("SPL_PASSED_EXPRESSION_ERROR_MSG", new Object[]{"middle"})); }
this._lhsExp = l;
this._midExp = m;
this._rhsExp = null;
}
else
{
logger.severe(
"number of parameters passed is not 3.");
throw new IllegalArgumentException(Messages.getString("SPL_NO_OF_ARGUMENTS_PASSED_ERROR_MSG", new Object[]{"3", ""+exprList.size()}));
}
}
else
{
logger.severe(Thread.currentThread().getName()+" "+"parameters passed are null.");
throw new IllegalArgumentException(Messages.getString("SPL_NO_OF_ARGUMENTS_PASSED_ERROR_MSG", new Object[]{"3", "null"}));
}
if (validateExpression)
{
if (!validate())
{
logger.severe(Thread.currentThread().getName()+" "+"validation error: " + className
+ " has wrong data type passed in.");
throw new SPLException(Messages.getString(
"SPL_VALIDATION_ERROR_MSG", new Object[] { className }));
}
}
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "Substring");
}
public Object evaluate() throws SPLException
{
logger.entering(sourceClass,Thread.currentThread().getName()+" "+ "evaluate");
try
{
String result = "";
String o1 = (String) _lhsExp.evaluate();
Number o2 = (Number) _midExp.evaluate();
if (_rhsExp != null)
{
Number o3 = (Number) _rhsExp.evaluate();
result = o1.substring(((Integer) o2).intValue(), ((Integer) o3)
.intValue());
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "evaluate" + result);
return result;
}
else
{
result = o1.substring(((Integer) o2).intValue());
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "evaluate" + result);
return result;
}
}
catch (Exception e)
{
logger.severe(Thread.currentThread().getName()+" "+"evaluation error: " + e.toString());
throw new SPLException(Messages.getString(
"SPL_EVALUATION_ERROR_MSG", new Object[] { e
.getLocalizedMessage() }));
}
}
public boolean validate() throws SPLException
{
logger.entering(sourceClass,Thread.currentThread().getName()+" "+ "validate");
TypeInfo lType = _lhsExp.getType();
TypeInfo mType = _midExp.getType();
_dataType.setType(TypeConstants.stringType);
if(!lType.getIsArray() && !mType.getIsArray())
{
if (_rhsExp != null)
{
TypeInfo rType = _rhsExp.getType();
if (!rType.getIsArray() && TypeResolver.isString(lType) &&
TypeResolver.isNumeric(mType) &&
TypeResolver.isNumeric(rType))
{
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "validate");
return true;
}
}
else
{
if (TypeResolver.isString(lType) && TypeResolver.isNumeric(mType))
{
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "validate");
return true;
}
}
}
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "validate");
return false;
}
public TypeInfo getType() throws SPLException
{
logger.entering(sourceClass,Thread.currentThread().getName()+" "+ "getType");
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "getType");
return _dataType;
}
public String toString()
{
logger.entering(sourceClass,Thread.currentThread().getName()+" "+ "toString");
String className=this.getClass().getName();
String str=className.substring(className.lastIndexOf(".")+1, className.length())+"( ";
if(this._lhsExp!=null){
str+=this._lhsExp.toString();
}
if(this._midExp!=null){
str+=this._midExp.toString();
}
if(this._rhsExp!=null){
str+=this._rhsExp.toString();
}
str+=" )";
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "toString");
return str;
}
public String getReferenceTypeName() throws SPLException {
// TODO Auto-generated method stub
return null;
}
}