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package org.mule.expression; |
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import org.mule.DefaultMuleEvent; |
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import org.mule.DefaultMuleMessage; |
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import org.mule.RequestContext; |
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import org.mule.api.MuleContext; |
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import org.mule.api.MuleException; |
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import org.mule.api.MuleMessage; |
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import org.mule.api.expression.ExpressionEvaluator; |
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import org.mule.api.expression.ExpressionRuntimeException; |
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import org.mule.api.processor.MessageProcessor; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.util.StringUtils; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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44 | 0 | public class MessageProcessorExpressionEvaluator implements ExpressionEvaluator |
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{ |
46 | 0 | protected transient Log logger = LogFactory.getLog(MessageProcessorExpressionEvaluator.class); |
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public static final String NAME = "process"; |
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public Object evaluate(String expression, MuleMessage message) |
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{ |
52 | 0 | MuleContext muleContext = message.getMuleContext(); |
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String processorName; |
55 | 0 | String processorArgExpression = null; |
56 | 0 | MuleMessage messageToProcess = message; |
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58 | 0 | if (StringUtils.isBlank(expression)) |
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{ |
60 | 0 | return message; |
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} |
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63 | 0 | boolean isNestedExpression = expression.indexOf(':') > 0; |
64 | 0 | if (!isNestedExpression) |
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{ |
66 | 0 | processorName = expression; |
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} |
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else |
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{ |
70 | 0 | processorName = expression.substring(0, expression.indexOf(':')); |
71 | 0 | processorArgExpression = expression.substring(expression.indexOf(':') + 1, expression.length()); |
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} |
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74 | 0 | if (processorArgExpression != null) |
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{ |
76 | 0 | messageToProcess = evaluateProcessorArgument(message, processorArgExpression); |
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} |
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79 | 0 | MessageProcessor processor = lookupMessageProcessor(processorName, muleContext); |
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try |
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{ |
83 | 0 | return processor.process(new DefaultMuleEvent(messageToProcess, RequestContext.getEvent())) |
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.getMessage(); |
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} |
86 | 0 | catch (MuleException e) |
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{ |
88 | 0 | throw new ExpressionRuntimeException( |
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CoreMessages.createStaticMessage("Exception invoking MessageProcessor '" + processorName |
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+ "'"), e); |
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} |
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} |
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protected MessageProcessor lookupMessageProcessor(String processorName, MuleContext muleContext) |
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{ |
96 | 0 | Object processor = muleContext.getRegistry().lookupObject(processorName); |
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98 | 0 | if (!(processor instanceof MessageProcessor)) |
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{ |
100 | 0 | throw new ExpressionRuntimeException(CoreMessages.createStaticMessage("No MessageProcessor '" |
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+ processorName |
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+ "' found.")); |
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} |
104 | 0 | return (MessageProcessor) processor; |
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} |
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protected MuleMessage evaluateProcessorArgument(MuleMessage message, String processorArgExpression) |
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{ |
109 | 0 | Object result = message.getMuleContext().getExpressionManager().evaluate(processorArgExpression, |
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message); |
111 | 0 | if (result instanceof MuleMessage) |
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{ |
113 | 0 | return (MuleMessage) result; |
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} |
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else |
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{ |
117 | 0 | return new DefaultMuleMessage(result, message.getMuleContext()); |
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} |
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} |
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public String getName() |
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{ |
126 | 0 | return NAME; |
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} |
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public void setName(String name) |
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{ |
134 | 0 | throw new UnsupportedOperationException(); |
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} |
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} |