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: 695550 $
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
064 if (dataFormat == null) {
065 dataFormat = routeContext.getDataFormat(ref);
066 }
067
068 if (dataFormat instanceof DataFormatType) {
069 type = (DataFormatType)dataFormat;
070 } else {
071 return dataFormat;
072 }
073 }
074 return type.getDataFormat(routeContext);
075 }
076
077
078 public void marshal(Exchange exchange, Object graph, OutputStream stream) throws Exception {
079 ObjectHelper.notNull(dataFormat, "dataFormat");
080 dataFormat.marshal(exchange, graph, stream);
081 }
082
083 public Object unmarshal(Exchange exchange, InputStream stream) throws Exception {
084 ObjectHelper.notNull(dataFormat, "dataFormat");
085 return dataFormat.unmarshal(exchange, stream);
086 }
087
088 public DataFormat getDataFormat(RouteContext routeContext) {
089 if (dataFormat == null) {
090 dataFormat = createDataFormat(routeContext);
091 ObjectHelper.notNull(dataFormat, "dataFormat");
092 configureDataFormat(dataFormat);
093 }
094 return dataFormat;
095 }
096
097 /**
098 * Factory method to create the data format instance
099 */
100 protected DataFormat createDataFormat(RouteContext routeContext) {
101 if (dataFormatTypeName != null) {
102 Class type = ObjectHelper.loadClass(dataFormatTypeName, getClass().getClassLoader());
103 if (type == null) {
104 throw new IllegalArgumentException("The class " + dataFormatTypeName + " is not on the classpath! Cannot use the dataFormat " + this);
105 }
106 return (DataFormat) ObjectHelper.newInstance(type);
107 }
108 return null;
109 }
110
111 /**
112 * Allows derived classes to customize the data format
113 */
114 protected void configureDataFormat(DataFormat dataFormat) {
115 }
116
117 /**
118 * Sets a named property on the data format instance using introspection
119 */
120 protected void setProperty(Object bean, String name, Object value) {
121 try {
122 IntrospectionSupport.setProperty(bean, name, value);
123 } catch (Exception e) {
124 throw new IllegalArgumentException("Failed to set property " + name + " on " + bean
125 + ". Reason: " + e, e);
126 }
127 }
128
129
130 }