/*
 * Copyright 2005 JBoss Inc
 *
 * 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 org.drools.model.functions.temporal;

import org.drools.model.impl.ModelComponent;

public abstract class AbstractTemporalPredicate<T extends AbstractTemporalPredicate> implements TemporalPredicate, ModelComponent {

    protected boolean negated = false;
    protected boolean thisOnRight = false;

    public TemporalPredicate setNegated( boolean negated ) {
        this.negated = negated;
        return this;
    }

    @Override
    public boolean isNegated() {
        return negated;
    }

    @Override
    public boolean isEqualTo( ModelComponent other ) {
        if (!(other instanceof AbstractTemporalPredicate)) {
            return false;
        }

        AbstractTemporalPredicate tempPred = (( AbstractTemporalPredicate ) other);

        if (negated != tempPred.negated || thisOnRight != tempPred.thisOnRight || getClass() != tempPred.getClass()) {
            return false;
        }

        return isTemporalPredicateEqualTo( (T) tempPred );
    }

    protected abstract boolean isTemporalPredicateEqualTo(T other);

    @Override
    public TemporalPredicate negate() {
        this.negated = !this.negated;
        return this;
    }

    @Override
    public boolean isThisOnRight() {
        return thisOnRight;
    }

    @Override
    public TemporalPredicate thisOnRight() {
        this.thisOnRight = true;
        return this;
    }
}
