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package org.mule.util.expression; |
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import org.mule.api.transport.MessageAdapter; |
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import org.mule.config.i18n.CoreMessages; |
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import java.util.HashMap; |
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import java.util.Map; |
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import java.util.StringTokenizer; |
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28 | 1148 | public class MessageHeadersExpressionEvaluator implements ExpressionEvaluator |
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{ |
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public static final String NAME = "headers"; |
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public static final String DELIM = ","; |
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public Object evaluate(String expression, Object message) |
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{ |
35 | 12 | boolean required = false; |
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38 | 12 | if(expression.endsWith("required")) |
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{ |
40 | 0 | required = true; |
41 | 0 | expression = expression.substring(0, expression.length() - 8); |
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} |
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44 | 12 | if (message instanceof MessageAdapter) |
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{ |
46 | 8 | StringTokenizer tokenizer = new StringTokenizer(expression, DELIM); |
47 | 8 | Map result = new HashMap(tokenizer.countTokens()); |
48 | 20 | while(tokenizer.hasMoreTokens()) |
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{ |
50 | 12 | String s = tokenizer.nextToken(); |
51 | 12 | s = s.trim(); |
52 | 12 | Object val = ((MessageAdapter) message).getProperty(s); |
53 | 12 | if(val!=null) |
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{ |
55 | 8 | result.put(s, val); |
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} |
57 | 4 | else if(required) |
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{ |
59 | 0 | throw new ExpressionRuntimeException(CoreMessages.expressionEvaluatorReturnedNull(NAME, expression)); |
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} |
61 | 12 | } |
62 | 8 | if(result.size()==0) |
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{ |
64 | 4 | return null; |
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} |
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else |
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{ |
68 | 4 | return result; |
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} |
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} |
71 | 4 | return null; |
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} |
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public String getName() |
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{ |
77 | 1146 | return NAME; |
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} |
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public void setName(String name) |
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{ |
83 | 0 | throw new UnsupportedOperationException("setName"); |
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} |
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} |