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package org.mule.module.json.transformers; |
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import org.mule.api.MuleMessage; |
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import org.mule.api.lifecycle.InitialisationException; |
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import org.mule.api.transformer.TransformerException; |
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import org.mule.module.json.filters.IsJsonFilter; |
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import org.mule.transformer.types.DataTypeFactory; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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import java.io.IOException; |
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import java.io.StringWriter; |
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import java.io.UnsupportedEncodingException; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.Map; |
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public class ObjectToJson extends AbstractJsonTransformer |
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{ |
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41 | 0 | protected transient final Log logger = LogFactory.getLog(ObjectToJson.class); |
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43 | 0 | private Map<Class<?>, Class<?>> serializationMixins = new HashMap<Class<?>, Class<?>>(); |
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protected Class<?> sourceClass; |
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47 | 0 | private boolean handleException = false; |
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49 | 0 | private IsJsonFilter isJsonFilter = new IsJsonFilter(); |
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public ObjectToJson() |
52 | 0 | { |
53 | 0 | this.setReturnDataType(DataTypeFactory.JSON_STRING); |
54 | 0 | } |
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@Override |
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public void initialise() throws InitialisationException |
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{ |
59 | 0 | super.initialise(); |
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|
62 | 0 | if (getSourceClass() != null) |
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{ |
64 | 0 | sourceTypes.clear(); |
65 | 0 | registerSourceType(DataTypeFactory.create(getSourceClass())); |
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} |
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69 | 0 | for (Map.Entry<Class<?>, Class<?>> entry : getMixins().entrySet()) |
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{ |
71 | 0 | getMapper().getSerializationConfig().addMixInAnnotations(entry.getKey(), entry.getValue()); |
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} |
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74 | 0 | for (Map.Entry<Class<?>, Class<?>> entry : serializationMixins.entrySet()) |
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{ |
76 | 0 | getMapper().getSerializationConfig().addMixInAnnotations(entry.getKey(), entry.getValue()); |
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} |
78 | 0 | } |
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@Override |
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public Object transformMessage(MuleMessage message, String outputEncoding) throws TransformerException |
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{ |
83 | 0 | Object src = message.getPayload(); |
84 | 0 | if (src instanceof String && isJsonFilter.accept(src)) |
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{ |
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87 | 0 | return src; |
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} |
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|
91 | 0 | if (message.getExceptionPayload() != null && this.isHandleException()) |
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{ |
93 | 0 | if (logger.isDebugEnabled()) |
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{ |
95 | 0 | logger.debug("Found exception with null payload"); |
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} |
97 | 0 | src = this.getException(message.getExceptionPayload().getException()); |
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} |
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|
100 | 0 | StringWriter writer = new StringWriter(); |
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try |
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{ |
103 | 0 | getMapper().writeValue(writer, src); |
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} |
105 | 0 | catch (IOException e) |
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{ |
107 | 0 | throw new TransformerException(this, e); |
108 | 0 | } |
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|
110 | 0 | if (returnType.getType().equals(byte[].class)) |
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{ |
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try |
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{ |
114 | 0 | return writer.toString().getBytes(outputEncoding); |
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} |
116 | 0 | catch (UnsupportedEncodingException uee) |
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{ |
118 | 0 | throw new TransformerException(this, uee); |
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} |
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} |
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else |
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{ |
123 | 0 | return writer.toString(); |
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} |
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} |
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private Exception getException(Throwable t) |
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{ |
133 | 0 | Exception returnValue = null; |
134 | 0 | List<Throwable> causeStack = new ArrayList<Throwable>(); |
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|
136 | 0 | for (Throwable tempCause = t; tempCause != null; tempCause = tempCause.getCause()) |
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{ |
138 | 0 | causeStack.add(tempCause); |
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} |
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141 | 0 | for (int i = causeStack.size() - 1; i >= 0; i--) |
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{ |
143 | 0 | Throwable tempCause = causeStack.get(i); |
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146 | 0 | if (i == causeStack.size()) |
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{ |
148 | 0 | returnValue = new Exception(tempCause.getMessage()); |
149 | 0 | returnValue.setStackTrace(tempCause.getStackTrace()); |
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} |
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else |
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{ |
153 | 0 | returnValue = new Exception(tempCause.getMessage(), returnValue); |
154 | 0 | returnValue.setStackTrace(tempCause.getStackTrace()); |
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} |
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} |
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158 | 0 | return returnValue; |
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} |
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public boolean isHandleException() |
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{ |
163 | 0 | return this.handleException; |
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} |
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public void setHandleException(boolean handleException) |
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{ |
168 | 0 | this.handleException = handleException; |
169 | 0 | } |
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public Class<?> getSourceClass() |
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{ |
173 | 0 | return sourceClass; |
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} |
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public void setSourceClass(Class<?> sourceClass) |
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{ |
178 | 0 | this.sourceClass = sourceClass; |
179 | 0 | } |
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public Map<Class<?>, Class<?>> getSerializationMixins() |
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{ |
183 | 0 | return serializationMixins; |
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} |
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public void setSerializationMixins(Map<Class<?>, Class<?>> serializationMixins) |
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{ |
188 | 0 | this.serializationMixins = serializationMixins; |
189 | 0 | } |
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} |
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