/*
* Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.querydsl.core.types;
import java.lang.reflect.Array;
import java.util.List;
import javax.annotation.concurrent.Immutable;
import com.google.common.collect.ImmutableList;
/**
* {@code ArrayConstructorExpression} extends {@link FactoryExpressionBase} to represent array initializers
*
* @author tiwe
*
* @param <T> component type
*/
@Immutable
public class ArrayConstructorExpression<T> extends FactoryExpressionBase<T[]> {
private static final long serialVersionUID = 8667880104290226505L;
private final Class<T> elementType;
private final ImmutableList<Expression<?>> args;
@SuppressWarnings("unchecked")
public ArrayConstructorExpression(Expression<?>... args) {
this((Class) Object[].class, (Expression[]) args);
}
@SuppressWarnings("unchecked")
public ArrayConstructorExpression(Class<T[]> type, Expression<T>... args) {
super(type);
this.elementType = (Class<T>) type.getComponentType();
this.args = ImmutableList.<Expression<?>>copyOf(args);
}
public final Class<T> getElementType() {
return elementType;
}
@Override
public <R,C> R accept(Visitor<R,C> v, C context) {
return v.visit(this, context);
}
@SuppressWarnings("unchecked")
@Override
public T[] newInstance(Object... a) {
if (a.getClass().getComponentType().equals(elementType)) {
return (T[]) a;
} else {
T[] rv = (T[]) Array.newInstance(elementType, a.length);
System.arraycopy(a, 0, rv, 0, a.length);
return rv;
}
}
@Override
public List<Expression<?>> getArgs() {
return args;
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
} else if (obj instanceof FactoryExpression<?>) {
FactoryExpression<?> c = (FactoryExpression<?>) obj;
return args.equals(c.getArgs()) && getType().equals(c.getType());
} else {
return false;
}
}
}