/*
* Copyright 2011, Mysema Ltd
*
* 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.mysema.query.collections;
import com.mysema.query.QueryMetadata;
import com.mysema.query.support.CollectionAnyVisitor;
import com.mysema.query.support.Context;
import com.mysema.query.support.QueryMixin;
import com.mysema.query.types.ExpressionUtils;
import com.mysema.query.types.Path;
import com.mysema.query.types.Predicate;
import com.mysema.query.types.template.BooleanTemplate;
/**
* CollQueryMixin extends {@link QueryMixin} to provide normalization logic specific to this module
*
* @author tiwe
*
* @param <T>
*/
public class CollQueryMixin<T> extends QueryMixin<T> {
private static final Predicate ANY = BooleanTemplate.create("any");
public CollQueryMixin() {}
public CollQueryMixin(QueryMetadata metadata) {
super(metadata);
}
public CollQueryMixin(T self, QueryMetadata metadata) {
super(self, metadata);
}
@Override
protected Predicate normalize(Predicate predicate, boolean where) {
predicate = (Predicate)ExpressionUtils.extract(predicate);
if (predicate != null) {
Context context = new Context();
Predicate transformed = (Predicate) predicate.accept(CollectionAnyVisitor.DEFAULT, context);
for (int i = 0; i < context.paths.size(); i++) {
leftJoin(
(Path)context.paths.get(i).getMetadata().getParent(),
(Path)context.replacements.get(i));
on(ANY);
}
return transformed;
} else {
return predicate;
}
}
}