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.model.IdentifiedType;
029 import org.apache.camel.spi.DataFormat;
030 import org.apache.camel.spi.RouteContext;
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 * Represents the base XML type for DataFormat.
037 *
038 * @version $Revision: 660266 $
039 */
040 @XmlType(name = "dataFormatType")
041 @XmlAccessorType(XmlAccessType.FIELD)
042 public class DataFormatType extends IdentifiedType implements DataFormat {
043 @XmlTransient
044 private DataFormat dataFormat;
045 @XmlTransient
046 private String dataFormatTypeName;
047
048 public DataFormatType() {
049 }
050
051 public DataFormatType(DataFormat dataFormat) {
052 this.dataFormat = dataFormat;
053 }
054
055 protected DataFormatType(String dataFormatTypeName) {
056 this.dataFormatTypeName = dataFormatTypeName;
057 }
058
059 public static DataFormat getDataFormat(RouteContext routeContext, DataFormatType type, String ref) {
060 if (type == null) {
061 notNull(ref, "ref or dataFormatType");
062 DataFormat dataFormat = routeContext.lookup(ref, DataFormat.class);
063 if (dataFormat instanceof DataFormatType) {
064 type = (DataFormatType)dataFormat;
065 } else {
066 return dataFormat;
067 }
068 }
069 return type.getDataFormat(routeContext);
070 }
071
072
073 public void marshal(Exchange exchange, Object graph, OutputStream stream) throws Exception {
074 ObjectHelper.notNull(dataFormat, "dataFormat");
075 dataFormat.marshal(exchange, graph, stream);
076 }
077
078 public Object unmarshal(Exchange exchange, InputStream stream) throws Exception {
079 ObjectHelper.notNull(dataFormat, "dataFormat");
080 return dataFormat.unmarshal(exchange, stream);
081 }
082
083 public DataFormat getDataFormat(RouteContext routeContext) {
084 if (dataFormat == null) {
085 dataFormat = createDataFormat(routeContext);
086 ObjectHelper.notNull(dataFormat, "dataFormat");
087 configureDataFormat(dataFormat);
088 }
089 return dataFormat;
090 }
091
092 /**
093 * Factory method to create the data format instance
094 */
095 protected DataFormat createDataFormat(RouteContext routeContext) {
096 if (dataFormatTypeName != null) {
097 Class type = ObjectHelper.loadClass(dataFormatTypeName, getClass().getClassLoader());
098 if (type == null) {
099 throw new IllegalArgumentException("The class " + dataFormatTypeName + " is not on the classpath! Cannot use the dataFormat " + this);
100 }
101 return (DataFormat) ObjectHelper.newInstance(type);
102 }
103 return null;
104 }
105
106 /**
107 * Allows derived classes to customize the data format
108 */
109 protected void configureDataFormat(DataFormat dataFormat) {
110 }
111
112 /**
113 * Sets a named property on the data format instance using introspection
114 */
115 protected void setProperty(Object bean, String name, Object value) {
116 try {
117 IntrospectionSupport.setProperty(bean, name, value);
118 } catch (Exception e) {
119 throw new IllegalArgumentException("Failed to set property " + name + " on " + bean
120 + ". Reason: " + e, e);
121 }
122 }
123
124
125 }