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package org.mule.transformer.simple; |
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import org.mule.RequestContext; |
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import org.mule.api.transformer.DiscoverableTransformer; |
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import org.mule.api.transformer.TransformerException; |
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import org.mule.api.transport.OutputHandler; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.transformer.AbstractTransformer; |
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import org.mule.transformer.types.DataTypeFactory; |
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import org.mule.util.IOUtils; |
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import org.mule.util.StringMessageUtils; |
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import java.io.ByteArrayOutputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.UnsupportedEncodingException; |
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public class ObjectToString extends AbstractTransformer implements DiscoverableTransformer |
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{ |
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protected static final int DEFAULT_BUFFER_SIZE = 80; |
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34 | 0 | private int priorityWeighting = DiscoverableTransformer.DEFAULT_PRIORITY_WEIGHTING + 1; |
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public ObjectToString() |
37 | 0 | { |
38 | 0 | registerSourceType(DataTypeFactory.OBJECT); |
39 | 0 | registerSourceType(DataTypeFactory.BYTE_ARRAY); |
40 | 0 | registerSourceType(DataTypeFactory.INPUT_STREAM); |
41 | 0 | registerSourceType(DataTypeFactory.create(OutputHandler.class)); |
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44 | 0 | setReturnDataType(DataTypeFactory.TEXT_STRING); |
45 | 0 | } |
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@Override |
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public Object doTransform(Object src, String outputEncoding) throws TransformerException |
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{ |
50 | 0 | String output = ""; |
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52 | 0 | if (src instanceof InputStream) |
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{ |
54 | 0 | output = createStringFromInputStream((InputStream) src, outputEncoding); |
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} |
56 | 0 | else if (src instanceof OutputHandler) |
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{ |
58 | 0 | output = createStringFromOutputHandler((OutputHandler) src, outputEncoding); |
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} |
60 | 0 | else if (src instanceof byte[]) |
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{ |
62 | 0 | output = createStringFromByteArray((byte[]) src, outputEncoding); |
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} |
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else |
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{ |
66 | 0 | output = StringMessageUtils.toString(src); |
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} |
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69 | 0 | return output; |
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} |
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protected String createStringFromInputStream(InputStream input, String outputEncoding) |
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throws TransformerException |
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{ |
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try |
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{ |
77 | 0 | ByteArrayOutputStream byteOut = new ByteArrayOutputStream(); |
78 | 0 | IOUtils.copy(input, byteOut); |
79 | 0 | return byteOut.toString(outputEncoding); |
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} |
81 | 0 | catch (IOException e) |
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{ |
83 | 0 | throw new TransformerException(CoreMessages.errorReadingStream(), e); |
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} |
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finally |
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{ |
87 | 0 | try |
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{ |
89 | 0 | input.close(); |
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} |
91 | 0 | catch (IOException e) |
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{ |
93 | 0 | logger.warn("Could not close stream", e); |
94 | 0 | } |
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} |
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} |
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protected String createStringFromOutputHandler(OutputHandler handler, String outputEncoding) |
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throws TransformerException |
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{ |
101 | 0 | ByteArrayOutputStream bytes = new ByteArrayOutputStream(); |
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try |
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{ |
104 | 0 | handler.write(RequestContext.getEvent(), bytes); |
105 | 0 | return bytes.toString(outputEncoding); |
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} |
107 | 0 | catch (IOException e) |
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{ |
109 | 0 | throw new TransformerException(this, e); |
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} |
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} |
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protected String createStringFromByteArray(byte[] bytes, String outputEncoding) |
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throws TransformerException |
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{ |
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try |
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{ |
118 | 0 | return new String(bytes, outputEncoding); |
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} |
120 | 0 | catch (UnsupportedEncodingException e) |
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{ |
122 | 0 | throw new TransformerException(this, e); |
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} |
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} |
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public int getPriorityWeighting() |
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{ |
128 | 0 | return priorityWeighting; |
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} |
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public void setPriorityWeighting(int priorityWeighting) |
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{ |
133 | 0 | this.priorityWeighting = priorityWeighting; |
134 | 0 | } |
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} |