/*
* Copyright 2004-2012 the original author or authors.
*
* Licensed 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.springframework.binding.expression.ognl;
import ognl.Ognl;
import ognl.OgnlException;
import ognl.OgnlRuntime;
import ognl.PropertyAccessor;
import org.springframework.binding.convert.ConversionService;
import org.springframework.binding.convert.service.DefaultConversionService;
import org.springframework.binding.expression.Expression;
import org.springframework.binding.expression.ParserContext;
import org.springframework.binding.expression.ParserException;
import org.springframework.binding.expression.spel.SpringELExpressionParser;
import org.springframework.binding.expression.support.AbstractExpressionParser;
/**
* An expression parser that parses Ognl expressions.
*
* @author Keith Donald
*
* @deprecated in favor of Spring EL, see {@link SpringELExpressionParser}
*/
public class OgnlExpressionParser extends AbstractExpressionParser {
private ConversionService conversionService = new DefaultConversionService();
/**
* The conversion service to use to perform type conversions as needed by the OGNL system. If not specified, the
* default is an instance of {@link DefaultConversionService}.
*/
public ConversionService getConversionService() {
return conversionService;
}
/**
* Sets the conversion service to use to perform type conversions as needed by the OGNL system.
* @param conversionService the conversion service to use
*/
public void setConversionService(ConversionService conversionService) {
this.conversionService = conversionService;
}
/**
* Add a property access strategy for the given class.
* @param clazz the class that contains properties needing access
* @param propertyAccessor the property access strategy
*/
public void addPropertyAccessor(Class<?> clazz, PropertyAccessor propertyAccessor) {
OgnlRuntime.setPropertyAccessor(clazz, propertyAccessor);
}
protected Expression doParseExpression(String expressionString, ParserContext context) throws ParserException {
try {
return new OgnlExpression(Ognl.parseExpression(expressionString),
parseVariableExpressions(context.getExpressionVariables()),
context.getExpectedEvaluationResultType(), expressionString, conversionService);
} catch (OgnlException e) {
throw new ParserException(expressionString, e);
}
}
}