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package org.mule.transformer; |
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import org.mule.api.MuleContext; |
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import org.mule.api.MuleMessage; |
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import org.mule.api.endpoint.ImmutableEndpoint; |
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import org.mule.api.lifecycle.InitialisationException; |
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import org.mule.api.transformer.DataType; |
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import org.mule.api.transformer.Transformer; |
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import org.mule.api.transformer.TransformerException; |
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import org.mule.util.StringUtils; |
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import java.util.Arrays; |
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import java.util.Iterator; |
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import java.util.LinkedList; |
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import java.util.List; |
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public class TransformerChain extends AbstractMessageTransformer |
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{ |
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private List<Transformer> transformers; |
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public TransformerChain(List<Transformer> transformers) |
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{ |
32 | 0 | super(); |
33 | 0 | if (transformers.size() < 1) |
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{ |
35 | 0 | throw new IllegalArgumentException("You must set at least one transformer"); |
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} |
37 | 0 | this.transformers = new LinkedList<Transformer>(transformers); |
38 | 0 | } |
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public TransformerChain(Transformer... transformers) |
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{ |
42 | 0 | this(Arrays.asList(transformers)); |
43 | 0 | this.name = generateTransformerName(); |
44 | 0 | } |
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public TransformerChain(String name, List<Transformer> transformers) |
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{ |
48 | 0 | this(transformers); |
49 | 0 | this.name = name; |
50 | 0 | } |
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public TransformerChain(String name, Transformer... transformers) |
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{ |
54 | 0 | this(name, Arrays.asList(transformers)); |
55 | 0 | } |
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@Override |
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public Object transformMessage(MuleMessage message, String outputEncoding) throws TransformerException |
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{ |
60 | 0 | MuleMessage result = message; |
61 | 0 | Object temp = message; |
62 | 0 | Transformer lastTransformer = null; |
63 | 0 | for (Iterator iterator = transformers.iterator(); iterator.hasNext();) |
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{ |
65 | 0 | lastTransformer = (Transformer) iterator.next(); |
66 | 0 | temp = lastTransformer.transform(temp); |
67 | 0 | if (temp instanceof MuleMessage) |
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{ |
69 | 0 | result = (MuleMessage) temp; |
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} |
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else |
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{ |
73 | 0 | result.setPayload(temp); |
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} |
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} |
76 | 0 | if (lastTransformer != null && lastTransformer.getReturnClass().equals(MuleMessage.class)) |
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{ |
78 | 0 | return result; |
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} |
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else |
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{ |
82 | 0 | return result.getPayload(); |
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} |
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} |
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@Override |
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public void initialise() throws InitialisationException |
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{ |
89 | 0 | for (Transformer transformer : transformers) |
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{ |
91 | 0 | transformer.initialise(); |
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} |
93 | 0 | } |
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@Override |
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public void setMuleContext(MuleContext muleContext) |
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{ |
98 | 0 | super.setMuleContext(muleContext); |
99 | 0 | for (Transformer transformer : transformers) |
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{ |
101 | 0 | transformer.setMuleContext(muleContext); |
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} |
103 | 0 | } |
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@Override |
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public void setEndpoint(ImmutableEndpoint endpoint) |
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{ |
108 | 0 | super.setEndpoint(endpoint); |
109 | 0 | for (Transformer transformer : transformers) |
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{ |
111 | 0 | transformer.setEndpoint(endpoint); |
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} |
113 | 0 | } |
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@Override |
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protected String generateTransformerName() |
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{ |
118 | 0 | String name = transformers.get(0).getClass().getSimpleName(); |
119 | 0 | int i = name.indexOf("To"); |
120 | 0 | DataType dt = transformers.get(transformers.size() -1).getReturnDataType(); |
121 | 0 | if (i > 0 && dt != null) |
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{ |
123 | 0 | String target = dt.getType().getSimpleName(); |
124 | 0 | if (target.equals("byte[]")) |
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{ |
126 | 0 | target = "byteArray"; |
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} |
128 | 0 | name = name.substring(0, i + 2) + StringUtils.capitalize(target); |
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} |
130 | 0 | return name; |
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} |
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} |