Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package org.apache.ode.jacob.soup.jackson; import java.io.IOException; import java.lang.reflect.Field; import org.apache.ode.jacob.ChannelRef; import org.apache.ode.jacob.ChannelRef.Type; import org.apache.ode.jacob.Message; import org.apache.ode.jacob.soup.CommChannel; import org.apache.ode.jacob.soup.jackson.JacksonExecutionQueueImpl.ExecutionQueueImplSerializer; import com.fasterxml.jackson.core.JsonGenerationException; import com.fasterxml.jackson.core.JsonGenerator; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.SerializerProvider; import com.fasterxml.jackson.databind.jsontype.TypeSerializer; import com.fasterxml.jackson.databind.ser.std.StdSerializer; /** * Jackson serializer for {@link Message} objects. * * @author Tammo van Lessen * */ public class ChannelRefSerializer extends StdSerializer<ChannelRef> { private final ExecutionQueueImplSerializer executionQueueImplSerializer; public ChannelRefSerializer(ExecutionQueueImplSerializer executionQueueImplSerializer) { super(ChannelRef.class); this.executionQueueImplSerializer = executionQueueImplSerializer; } @Override public void serialize(ChannelRef value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonGenerationException { jgen.writeStartObject(); serializeContents(value, jgen, provider); jgen.writeEndObject(); } @Override public void serializeWithType(ChannelRef value, JsonGenerator jgen, SerializerProvider provider, TypeSerializer typeSer) throws IOException, JsonProcessingException { typeSer.writeTypePrefixForObject(value, jgen); serializeContents(value, jgen, provider); typeSer.writeTypeSuffixForObject(value, jgen); } private void serializeContents(ChannelRef value, JsonGenerator jgen, SerializerProvider provider) throws JsonGenerationException, IOException { try { Field targetField = ChannelRef.class.getDeclaredField("target"); targetField.setAccessible(true); jgen.writeObjectField("target", targetField.get(value)); if (value.getType() == Type.CHANNEL) { executionQueueImplSerializer.markChannelUsed(value.getEndpoint(CommChannel.class).getId()); } } catch (Exception ex) { throw new RuntimeException(ex); } } }