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package org.mule.expression.transformers; |
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import org.mule.api.MuleMessage; |
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import org.mule.api.expression.ExpressionRuntimeException; |
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import org.mule.api.expression.RequiredValueException; |
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import org.mule.api.transformer.TransformerException; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.transport.NullPayload; |
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import java.util.Iterator; |
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37 | 0 | public class ExpressionTransformer extends AbstractExpressionTransformer |
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{ |
39 | 0 | private boolean returnSourceIfNull = false; |
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@Override |
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public Object transformMessage(MuleMessage message, String outputEncoding) throws TransformerException |
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{ |
44 | 0 | Object results[] = new Object[arguments.size()]; |
45 | 0 | int i = 0; |
46 | 0 | for (Iterator<ExpressionArgument> iterator = arguments.iterator(); iterator.hasNext(); i++) |
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{ |
48 | 0 | ExpressionArgument argument = iterator.next(); |
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try |
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{ |
51 | 0 | results[i] = argument.evaluate(message); |
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} |
53 | 0 | catch (RequiredValueException e) |
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{ |
55 | 0 | if(!argument.isOptional()) |
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{ |
57 | 0 | throw e; |
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} |
59 | 0 | logger.warn(e.getMessage()); |
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} |
61 | 0 | catch (ExpressionRuntimeException e) |
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{ |
63 | 0 | throw new TransformerException(this, e); |
64 | 0 | } |
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66 | 0 | if (!argument.isOptional() && results[i] == null) |
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{ |
68 | 0 | throw new TransformerException(CoreMessages.expressionEvaluatorReturnedNull( |
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argument.getExpressionConfig().getEvaluator(), argument.getExpressionConfig().getExpression()), this); |
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} |
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} |
74 | 0 | if (isReturnSourceIfNull() && checkIfAllAreNull(results)) |
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{ |
76 | 0 | return message; |
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} |
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79 | 0 | if (results.length == 1) |
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{ |
81 | 0 | return results[0]; |
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} |
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else |
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{ |
85 | 0 | return results; |
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} |
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} |
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private boolean checkIfAllAreNull(Object[] objects) |
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{ |
91 | 0 | for (int i = 0; i < objects.length; i++) |
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{ |
93 | 0 | if (objects[i] != null && !(objects[i] instanceof NullPayload)) |
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{ |
95 | 0 | return false; |
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} |
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} |
98 | 0 | return true; |
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} |
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public boolean isReturnSourceIfNull() |
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{ |
103 | 0 | return returnSourceIfNull; |
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} |
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public void setReturnSourceIfNull(boolean returnSourceIfNull) |
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{ |
108 | 0 | this.returnSourceIfNull = returnSourceIfNull; |
109 | 0 | } |
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} |