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.model.dataformat;
018
019 import java.io.InputStream;
020 import java.io.OutputStream;
021
022 import javax.xml.bind.annotation.XmlAccessType;
023 import javax.xml.bind.annotation.XmlAccessorType;
024 import javax.xml.bind.annotation.XmlTransient;
025 import javax.xml.bind.annotation.XmlType;
026
027 import org.apache.camel.Exchange;
028 import org.apache.camel.impl.RouteContext;
029 import org.apache.camel.model.IdentifiedType;
030 import org.apache.camel.spi.DataFormat;
031 import org.apache.camel.util.IntrospectionSupport;
032 import org.apache.camel.util.ObjectHelper;
033 import static org.apache.camel.util.ObjectHelper.notNull;
034
035 /**
036 * @version $Revision: 36321 $
037 */
038 @XmlType(name = "dataFormatType")
039 @XmlAccessorType(XmlAccessType.FIELD)
040 public class DataFormatType extends IdentifiedType implements DataFormat {
041 @XmlTransient
042 private DataFormat dataFormat;
043 @XmlTransient
044 private String dataFormatTypeName;
045
046 public DataFormatType() {
047 }
048
049 public DataFormatType(DataFormat dataFormat) {
050 this.dataFormat = dataFormat;
051 }
052
053 protected DataFormatType(String dataFormatTypeName) {
054 this.dataFormatTypeName = dataFormatTypeName;
055 }
056
057 public static DataFormat getDataFormat(RouteContext routeContext, DataFormatType type, String ref) {
058 if (type == null) {
059 notNull(ref, "ref or dataFormatType");
060 DataFormat dataFormat = routeContext.lookup(ref, DataFormat.class);
061 if (dataFormat instanceof DataFormatType) {
062 type = (DataFormatType)dataFormat;
063 } else {
064 return dataFormat;
065 }
066 }
067 return type.getDataFormat(routeContext);
068 }
069
070
071 public void marshal(Exchange exchange, Object graph, OutputStream stream) throws Exception {
072 ObjectHelper.notNull(dataFormat, "dataFormat");
073 dataFormat.marshal(exchange, graph, stream);
074 }
075
076 public Object unmarshal(Exchange exchange, InputStream stream) throws Exception {
077 ObjectHelper.notNull(dataFormat, "dataFormat");
078 return dataFormat.unmarshal(exchange, stream);
079 }
080
081 public DataFormat getDataFormat(RouteContext routeContext) {
082 if (dataFormat == null) {
083 dataFormat = createDataFormat(routeContext);
084 ObjectHelper.notNull(dataFormat, "dataFormat");
085 configureDataFormat(dataFormat);
086 }
087 return dataFormat;
088 }
089
090 /**
091 * Factory method to create the data format instance
092 */
093 protected DataFormat createDataFormat(RouteContext routeContext) {
094 if (dataFormatTypeName != null) {
095 Class type = ObjectHelper.loadClass(dataFormatTypeName, getClass().getClassLoader());
096 if (type == null) {
097 throw new IllegalArgumentException("The class " + dataFormatTypeName + " is not on the classpath! Cannot use the dataFormat " + this);
098 }
099 return (DataFormat) ObjectHelper.newInstance(type);
100 }
101 return null;
102 }
103
104 /**
105 * Allows derived classes to customize the data format
106 */
107 protected void configureDataFormat(DataFormat dataFormat) {
108 }
109
110 /**
111 * Sets a named property on the data format instance using introspection
112 */
113 protected void setProperty(Object bean, String name, Object value) {
114 try {
115 IntrospectionSupport.setProperty(bean, name, value);
116 } catch (Exception e) {
117 throw new IllegalArgumentException("Failed to set property " + name + " on " + bean
118 + ". Reason: " + e, e);
119 }
120 }
121
122
123 }