001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.component.xquery;
018    
019    import java.lang.annotation.Annotation;
020    
021    import net.sf.saxon.functions.Collection;
022    import org.apache.camel.CamelContext;
023    import org.apache.camel.Expression;
024    import org.apache.camel.component.bean.DefaultAnnotationExpressionFactory;
025    import org.apache.camel.language.LanguageAnnotation;
026    import org.apache.camel.language.NamespacePrefix;
027    
028    /**
029     * @version $Revision: 389 $
030     */
031    public class XQueryAnnotationExpressionFactory extends DefaultAnnotationExpressionFactory {
032        @Override
033        public Expression createExpression(CamelContext camelContext, Annotation annotation,
034                                           LanguageAnnotation languageAnnotation, Class expressionReturnType) {
035            String xQuery = getExpressionFromAnnotation(annotation);
036            XQueryBuilder builder = XQueryBuilder.xquery(xQuery);
037            if (annotation instanceof XQuery) {
038                XQuery xQueryAnnotation = (XQuery)annotation;
039                NamespacePrefix[] namespaces = xQueryAnnotation.namespaces();
040                if (namespaces != null) {
041                    for (NamespacePrefix namespacePrefix : namespaces) {
042                        // TODO
043                        // builder = builder.namespace(namespacePrefix.prefix(),
044                        // namespacePrefix.uri());
045                    }
046                }
047            }
048            if (expressionReturnType.isAssignableFrom(String.class)) {
049                builder.setResultsFormat(ResultFormat.String);
050            } else if (expressionReturnType.isAssignableFrom(Collection.class)) {
051                builder.setResultsFormat(ResultFormat.List);
052            }
053            return builder;
054        }
055    }