/*
* 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.types.expr;
import java.util.List;
import com.google.common.collect.ImmutableList;
import com.mysema.query.types.Expression;
import com.mysema.query.types.Operation;
import com.mysema.query.types.Operator;
import com.mysema.query.types.Ops;
import com.mysema.query.types.PredicateOperation;
import com.mysema.query.types.Visitor;
/**
* BooleanOperation represents boolean operations
*
* @author tiwe
*
*/
public class BooleanOperation extends BooleanExpression implements Operation<Boolean> {
private static final long serialVersionUID = 7432281499861357581L;
public static BooleanExpression create(Operator<? super Boolean> op, Expression<?> one) {
return new BooleanOperation(op, ImmutableList.<Expression<?>>of(one));
}
public static BooleanExpression create(Operator<? super Boolean> op, Expression<?> one, Expression<?> two) {
return new BooleanOperation(op, ImmutableList.of(one, two));
}
public static BooleanExpression create(Operator<? super Boolean> op, Expression<?>... args) {
return new BooleanOperation(op, args);
}
private final PredicateOperation opMixin;
protected BooleanOperation(Operator<? super Boolean> op, Expression<?>... args) {
this(op, ImmutableList.copyOf(args));
}
protected BooleanOperation(Operator<? super Boolean> op, ImmutableList<Expression<?>> args) {
super(new PredicateOperation((Operator)op, args));
opMixin = (PredicateOperation)mixin;
}
@Override
public final <R,C> R accept(Visitor<R,C> v, C context) {
return v.visit(opMixin, context);
}
@Override
public Expression<?> getArg(int index) {
return opMixin.getArg(index);
}
@Override
public List<Expression<?>> getArgs() {
return opMixin.getArgs();
}
@Override
public Operator<? super Boolean> getOperator() {
return opMixin.getOperator();
}
@Override
public BooleanExpression not() {
if (opMixin.getOperator() == Ops.NOT && opMixin.getArg(0) instanceof BooleanExpression) {
return (BooleanExpression) opMixin.getArg(0);
} else {
return super.not();
}
}
}