| /** |
| * 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.camel.language.ognl; |
| |
| import ognl.Ognl; |
| import ognl.OgnlContext; |
| import ognl.OgnlException; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.ExpressionEvaluationException; |
| import org.apache.camel.ExpressionIllegalSyntaxException; |
| import org.apache.camel.impl.ExpressionSupport; |
| |
| /** |
| * An <a href="http://www.ognl.org/">OGNL</a> {@link Expression} |
| * |
| * @version |
| */ |
| public class OgnlExpression extends ExpressionSupport { |
| |
| private final String expressionString; |
| private final Class<?> type; |
| private Object expression; |
| |
| public OgnlExpression(OgnlLanguage language, String expressionString, Class<?> type) { |
| this.expressionString = expressionString; |
| this.type = type; |
| try { |
| this.expression = Ognl.parseExpression(expressionString); |
| } catch (OgnlException e) { |
| throw new ExpressionIllegalSyntaxException(expressionString, e); |
| } |
| } |
| |
| public static OgnlExpression ognl(String expression) { |
| return new OgnlExpression(new OgnlLanguage(), expression, Object.class); |
| } |
| |
| public <T> T evaluate(Exchange exchange, Class<T> tClass) { |
| // TODO we could use caching here but then we'd have possible |
| // concurrency issues so lets assume that the provider caches |
| OgnlContext oglContext = new OgnlContext(); |
| try { |
| Object value = Ognl.getValue(expression, oglContext, new RootObject(exchange)); |
| return exchange.getContext().getTypeConverter().convertTo(tClass, value); |
| } catch (OgnlException e) { |
| throw new ExpressionEvaluationException(this, exchange, e); |
| } |
| } |
| |
| public Class<?> getType() { |
| return type; |
| } |
| |
| protected String assertionFailureMessage(Exchange exchange) { |
| return expressionString; |
| } |
| |
| @Override |
| public String toString() { |
| return "OGNL[" + expressionString + "]"; |
| } |
| } |