org.apache.camel.language.ognl.OgnlLanguage Maven / Gradle / Ivy
/*
* 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 java.util.Map;
import ognl.ClassResolver;
import ognl.Ognl;
import ognl.OgnlContext;
import org.apache.camel.Expression;
import org.apache.camel.ExpressionIllegalSyntaxException;
import org.apache.camel.Predicate;
import org.apache.camel.spi.ScriptingLanguage;
import org.apache.camel.spi.annotations.Language;
import org.apache.camel.support.TypedLanguageSupport;
@Language("ognl")
public class OgnlLanguage extends TypedLanguageSupport implements ScriptingLanguage {
@Override
public Predicate createPredicate(String expression) {
return createOgnlExpression(expression, Boolean.class);
}
@Override
public Expression createExpression(String expression) {
return createOgnlExpression(expression, Object.class);
}
private OgnlExpression createOgnlExpression(String expression, Class type) {
return new OgnlExpression(loadResource(expression), type);
}
@Override
public T evaluate(String script, Map bindings, Class resultType) {
script = loadResource(script);
try {
Object compiled = Ognl.parseExpression(script);
ClassResolver cr = new CamelClassResolver(getCamelContext().getClassResolver());
OgnlContext oglContext = Ognl.createDefaultContext(null, cr);
Object value = Ognl.getValue(compiled, oglContext, bindings);
return getCamelContext().getTypeConverter().convertTo(resultType, value);
} catch (Exception e) {
throw new ExpressionIllegalSyntaxException(script, e);
}
}
}