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package org.mule.expression.transformers; |
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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.context.MuleContextAware; |
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import org.mule.api.expression.ExpressionRuntimeException; |
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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.config.i18n.CoreMessages; |
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import org.mule.expression.ExpressionConfig; |
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import org.mule.transformer.types.DataTypeFactory; |
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public class ExpressionArgument implements MuleContextAware |
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{ |
27 | 0 | private ExpressionConfig expressionConfig = new ExpressionConfig(); |
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private String name; |
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private boolean optional; |
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private Class<?> returnClass; |
31 | 0 | protected ClassLoader expressionEvaluationClassLoader = ExpressionArgument.class.getClassLoader(); |
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private MuleContext muleContext; |
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public ExpressionArgument() |
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{ |
36 | 0 | super(); |
37 | 0 | } |
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public ExpressionArgument(String name, ExpressionConfig expressionConfig, boolean optional) |
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{ |
41 | 0 | this(name, expressionConfig, optional, null); |
42 | 0 | } |
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public ExpressionArgument(String name, ExpressionConfig expressionConfig, boolean optional, |
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Class<?> returnClass) |
46 | 0 | { |
47 | 0 | this.expressionConfig = expressionConfig; |
48 | 0 | this.name = name; |
49 | 0 | this.optional = optional; |
50 | 0 | this.returnClass = returnClass; |
51 | 0 | } |
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public void setMuleContext(MuleContext context) |
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{ |
55 | 0 | this.muleContext = context; |
56 | 0 | } |
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public String getName() |
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{ |
60 | 0 | return name; |
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} |
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public void setName(String name) |
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{ |
65 | 0 | this.name = name; |
66 | 0 | } |
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public ExpressionConfig getExpressionConfig() |
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{ |
70 | 0 | return expressionConfig; |
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} |
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public void setExpressionConfig(ExpressionConfig expressionConfig) |
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{ |
75 | 0 | this.expressionConfig = expressionConfig; |
76 | 0 | } |
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public boolean isOptional() |
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{ |
80 | 0 | return optional; |
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} |
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public void setOptional(boolean optional) |
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{ |
85 | 0 | this.optional = optional; |
86 | 0 | } |
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protected String getFullExpression() |
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{ |
90 | 0 | return expressionConfig.getFullExpression(muleContext.getExpressionManager()); |
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} |
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protected void validate() |
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{ |
95 | 0 | expressionConfig.validate(muleContext.getExpressionManager()); |
96 | 0 | } |
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public Object evaluate(MuleMessage message) throws ExpressionRuntimeException |
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{ |
107 | 0 | Object result = null; |
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115 | 0 | ClassLoader originalContextClassLoader = Thread.currentThread().getContextClassLoader(); |
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try |
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{ |
118 | 0 | Thread.currentThread().setContextClassLoader(expressionEvaluationClassLoader); |
119 | 0 | result = muleContext.getExpressionManager().evaluate(getExpression(), getEvaluator(), message, |
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!isOptional()); |
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} |
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finally |
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{ |
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125 | 0 | Thread.currentThread().setContextClassLoader(originalContextClassLoader); |
126 | 0 | } |
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128 | 0 | if (getReturnClass() != null && result != null) |
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{ |
130 | 0 | if (!getReturnClass().isInstance(result)) |
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{ |
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try |
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{ |
135 | 0 | Transformer t = muleContext.getRegistry().lookupTransformer( |
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DataTypeFactory.createFromObject(result), DataTypeFactory.create(getReturnClass())); |
137 | 0 | result = t.transform(result); |
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} |
139 | 0 | catch (TransformerException e) |
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{ |
141 | 0 | throw new ExpressionRuntimeException(CoreMessages.transformUnexpectedType(result.getClass(), |
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getReturnClass()), e); |
143 | 0 | } |
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} |
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} |
151 | 0 | return result; |
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} |
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public String getExpression() |
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{ |
156 | 0 | return expressionConfig.getExpression(); |
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} |
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public void setExpression(String expression) |
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{ |
161 | 0 | expressionConfig.setExpression(expression); |
162 | 0 | } |
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public String getEvaluator() |
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{ |
166 | 0 | return expressionConfig.getEvaluator(); |
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} |
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public void setEvaluator(String evaluator) |
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{ |
171 | 0 | expressionConfig.setEvaluator(evaluator); |
172 | 0 | } |
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public void setCustomEvaluator(String evaluator) |
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{ |
176 | 0 | expressionConfig.setCustomEvaluator(evaluator); |
177 | 0 | } |
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public String getCustomEvaluator() |
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{ |
181 | 0 | return expressionConfig.getCustomEvaluator(); |
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} |
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public Class<?> getReturnClass() |
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{ |
186 | 0 | return returnClass; |
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} |
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public void setReturnDataType(Class<?> returnClass) |
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{ |
191 | 0 | this.returnClass = returnClass; |
192 | 0 | } |
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public void setExpressionEvaluationClassLoader(ClassLoader expressionEvaluationClassLoader) |
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{ |
196 | 0 | this.expressionEvaluationClassLoader = expressionEvaluationClassLoader; |
197 | 0 | } |
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} |