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.joor;
  
  import java.util.Optional;
  
  import org.apache.camel.CamelContext;
  import org.apache.camel.Exchange;
  import org.apache.camel.ExpressionEvaluationException;
  import org.apache.camel.support.ExpressionAdapter;
  
  public class JoorExpression extends ExpressionAdapter {
  
      private final String text;
      private JoorCompiler compiler;
      private JoorMethod method;
  
      private Class<?> resultType;
      private boolean preCompile = true;
      private boolean singleQuotes = true;
  
      public JoorExpression(String text) {
          this.text = text;
      }
  
      @Override
      public String toString() {
          return "joor:" + text;
      }
  
      public JoorCompiler getCompiler() {
          return compiler;
      }
  
      public void setCompiler(JoorCompiler compiler) {
          this.compiler = compiler;
      }
  
      public boolean isPreCompile() {
          return preCompile;
      }
  
      public void setPreCompile(boolean preCompile) {
          this.preCompile = preCompile;
      }
  
      public Class<?> getResultType() {
          return resultType;
      }
  
      public void setResultType(Class<?> resultType) {
          this.resultType = resultType;
      }
  
      public boolean isSingleQuotes() {
          return singleQuotes;
      }
  
      public void setSingleQuotes(boolean singleQuotes) {
          this.singleQuotes = singleQuotes;
      }
  
      @Override
      public Object evaluate(Exchange exchange) {
          JoorMethod target = this.method;
          if (target == null) {
              target = compiler.compile(exchange.getContext(), text, singleQuotes);
          }
          // optimize as we call the same method all the time so we dont want to find the method every time as joor would do
          // if you use its call method
          Object body = exchange.getIn().getBody();
          // in the rare case the body is already an optional
          Optional<?> optional = body instanceof Optional ? (Optional<?>) body : Optional.ofNullable(body);
          Object out;
          try {
              out = target.evaluate(exchange.getContext(), exchange, exchange.getIn(), body, optional);
          } catch (Exception e) {
              throw new ExpressionEvaluationException(this, exchange, e);
          }
          if (out != null && resultType != null) {
              return exchange.getContext().getTypeConverter().convertTo(resultType, exchange, out);
          } else {
              return out;
          }
      }
  
      @Override
      public void init(CamelContext context) {
          super.init(context);
  
          if (preCompile && this.method == null) {
              this.method = compiler.compile(context, text, singleQuotes);
          }
      }
  
  }
  