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extracted MethodEvaluator

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This commit is contained in:
Timo Westkämper 2010-04-26 11:52:43 +00:00
parent 29054a66fa
commit 45abdbfae0
2 changed files with 45 additions and 19 deletions
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20
src/main/java/com/mysema/codegen/EvaluatorFactory.java
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@ -10,7 +10,6 @@ import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URLClassLoader;
import java.util.Arrays;
@ -133,24 +132,7 @@ public class EvaluatorFactory {
}
final Method method = clazz.getMethod("eval", types);
return new Evaluator<T>() {
@SuppressWarnings("unchecked")
@Override
public T evaluate(Object... args) {
try {
return (T) method.invoke(object, args);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException(e);
} catch (InvocationTargetException e) {
throw new IllegalArgumentException(e);
}
}
@Override
public Class<? extends T> getType() {
return projectionType;
}
};
return new MethodEvaluator<T>(method, object, projectionType);
} catch (ClassNotFoundException e) {
throw new CodegenException(e);
} catch (SecurityException e) {

44
src/main/java/com/mysema/codegen/MethodEvaluator.java Normal file
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@ -0,0 +1,44 @@
/**
*
*/
package com.mysema.codegen;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
* @author tiwe
*
* @param <T>
*/
public final class MethodEvaluator<T> implements Evaluator<T> {
private final Method method;
private final Object object;
private final Class<? extends T> projectionType;
MethodEvaluator(Method method, Object object, Class<? extends T> projectionType) {
this.method = method;
this.object = object;
this.projectionType = projectionType;
}
@SuppressWarnings("unchecked")
@Override
public T evaluate(Object... args) {
try {
return (T) method.invoke(object, args);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException(e);
} catch (InvocationTargetException e) {
throw new IllegalArgumentException(e);
}
}
@Override
public Class<? extends T> getType() {
return projectionType;
}
}