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.xpath;
  
  import java.lang.annotation.Annotation;
  
  import org.apache.camel.CamelContext;
  import org.apache.camel.Expression;
  import org.apache.camel.support.builder.ExpressionBuilder;
  import org.apache.camel.support.language.DefaultAnnotationExpressionFactory;
  import org.apache.camel.support.language.LanguageAnnotation;
  import org.apache.camel.support.language.NamespacePrefix;
  
  /**
   * Factory for the XPath expression annotations.
   */
  public class XPathAnnotationExpressionFactory extends DefaultAnnotationExpressionFactory {
  
      @Override
      public Expression createExpression(
              CamelContext camelContext, Annotation annotation, LanguageAnnotation languageAnnotation,
              Class<?> expressionReturnType) {
          String xpath = getExpressionFromAnnotation(annotation);
  
          Class<?> resultType = getResultType(annotation);
          if (resultType.equals(Object.class)) {
              resultType = expressionReturnType;
          }
  
          XPathBuilder builder = XPathBuilder.xpath(xpath, resultType);
          builder.preCompile(isPreCompile(annotation));
          builder.setLogNamespaces(isLogNamespaces(annotation));
          NamespacePrefix[] namespaces = getExpressionNameSpacePrefix(annotation);
          if (namespaces != null) {
              for (NamespacePrefix namespacePrefix : namespaces) {
                  builder = builder.namespace(namespacePrefix.prefix(), namespacePrefix.uri());
              }
          }
  
          String source = getSource(annotation);
          if (source != null) {
              builder.setSource(ExpressionBuilder.singleInputExpression(source));
          }
  
          return builder;
      }
  
      protected Class<?> getResultType(Annotation annotation) {
          return (Class<?>) getAnnotationObjectValue(annotation, "resultType");
      }
  
      protected NamespacePrefix[] getExpressionNameSpacePrefix(Annotation annotation) {
          return (NamespacePrefix[]) getAnnotationObjectValue(annotation, "namespaces");
      }
  
      protected String getSource(Annotation annotation) {
          String answer = null;
          try {
              answer = (String) getAnnotationObjectValue(annotation, "source");
          } catch (Exception e) {
              // Do Nothing
          }
          if (answer != null && answer.isBlank()) {
              return null;
          }
          return answer;
      }
  
      protected boolean isLogNamespaces(Annotation annotation) {
          // in case @XPath is extended in a custom annotation then it may not have the method
          try {
              return (boolean) getAnnotationObjectValue(annotation, "logNamespaces");
          } catch (Exception e) {
              // Do Nothing
          }
          return false;
      }
  
      protected boolean isPreCompile(Annotation annotation) {
          // in case @XPath is extended in a custom annotation then it may not have the method
          try {
              return (boolean) getAnnotationObjectValue(annotation, "preCompile");
          } catch (Exception e) {
              // Do Nothing
          }
          return false;
      }
  }
  