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: 41908 $ 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 }