content: /*
   * 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> T evaluate(String script, Map<String, Object> bindings, Class<T> 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);
          }
      }
  }
  