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added tests for EConstructor

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added static create method for EConstructor
This commit is contained in:
Timo Westkämper 2010-01-29 08:22:38 +00:00
parent 8c798277e9
commit d02c6befcc
2 changed files with 79 additions and 0 deletions
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23
querydsl-core/src/main/java/com/mysema/query/types/expr/EConstructor.java
View File

@ -10,6 +10,8 @@ import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.apache.commons.lang.ClassUtils;
import com.mysema.query.types.Visitor;
/**
@ -25,6 +27,27 @@ public class EConstructor<D> extends Expr<D> {
private final List<Expr<?>> args;
private final Class<?>[] parameterTypes;
public static <D> EConstructor<D> create(Class<D> type, Expr<?>... args){
for (Constructor<?> c : type.getConstructors()){
Class<?>[] paramTypes = c.getParameterTypes();
if (paramTypes.length == args.length){
boolean found = true;
for (int i = 0; i < paramTypes.length; i++){
Class<?> paramType = paramTypes[i];
if (paramType.isPrimitive()) paramType = ClassUtils.primitiveToWrapper(paramType);
if (!paramType.isAssignableFrom(args[i].getType())){
found = false;
break;
}
}
if (found){
return new EConstructor<D>(type, paramTypes, args);
}
}
}
throw new IllegalArgumentException("Got no matching constructor");
}
public EConstructor(Class<D> type, Class<?>[] paramTypes, Expr<?>... args) {
super(type);

56
querydsl-core/src/test/java/com/mysema/query/types/expr/EConstructorTest.java Normal file
View File

@ -0,0 +1,56 @@
package com.mysema.query.types.expr;
import static org.junit.Assert.*;
import java.lang.reflect.Constructor;
import org.junit.Test;
public class EConstructorTest {
public static class Projection{
public Projection(){
}
public Projection(Long id){
}
public Projection(long id, String text){
}
}
@Test
public void test_Constructor(){
ENumber<Long> longVal = ENumberConst.create(1l);
EString stringVal = EStringConst.create("");
new EConstructor<Projection>(Projection.class, new Class[]{long.class, String.class}, longVal, stringVal)
.getJavaConstructor();
}
@Test
public void test_create(){
ENumber<Long> longVal = ENumberConst.create(1l);
EString stringVal = EStringConst.create("");
Constructor<?> c = EConstructor.create(Projection.class, longVal, stringVal).getJavaConstructor();
assertEquals(long.class, c.getParameterTypes()[0]);
assertEquals(String.class, c.getParameterTypes()[1]);
}
@Test
public void test_create2(){
ENumber<Long> longVal = ENumberConst.create(1l);
Constructor<?> c = EConstructor.create(Projection.class, longVal).getJavaConstructor();
assertEquals(Long.class, c.getParameterTypes()[0]);
}
@Test
public void test_create3(){
Constructor<?> c = EConstructor.create(Projection.class).getJavaConstructor();
assertEquals(0, c.getParameterTypes().length);
}
}