net.sf.ehcache.search.parser.MTarget Maven / Gradle / Ivy

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/**
 *  Copyright Terracotta, 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 net.sf.ehcache.search.parser;

public class MTarget {

    /**
     * The agg.
     */
    private final MAggregate agg;

    /**
     * The attr.
     */
    private final MAttribute attr;

    /**
     * Instantiates a new model target of key/value.
     */
    public MTarget() {
        agg = null;
        attr = null;
    }

    /**
     * Instantiates a new model target from an aggregate.
     *
     * @param agg the agg
     */
    public MTarget(MAggregate agg) {
        this.agg = agg;
        this.attr = null;
    }

    /**
     * Instantiates a new model target from attribute.
     *
     * @param attr the attr
     */
    public MTarget(MAttribute attr) {
        this.attr = attr;
        this.agg = null;
    }

    /**
     * Gets the aggregate.
     *
     * @return the aggregate
     */
    public MAggregate getAggregate() {
        return agg;
    }

    /**
     * Gets the attribute.
     *
     * @return the attribute
     */
    public MAttribute getAttribute() {
        return attr;
    }

    /**
     * Checks if is attribute.
     *
     * @return true, if is attribute
     */
    public boolean isAttribute() {
        return attr != null;
    }

    /**
     * Checks if is aggregate.
     *
     * @return true, if is aggregate
     */
    public boolean isAggregate() {
        return agg != null;
    }

    /**
     * Checks if is star.
     *
     * @return true, if is star
     */
    public boolean isStar() {
        return agg == null && attr == null;
    }

    /*
     * (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    public String toString() {
        if (agg != null) {
            return agg.toString();
        } else if (attr != null) {
            return attr.toString();
        } else {
            return "*";
        }
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((agg == null) ? 0 : agg.hashCode());
        result = prime * result + ((attr == null) ? 0 : attr.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null) return false;
        if (getClass() != obj.getClass()) return false;
        MTarget other = (MTarget)obj;
        if (agg == null) {
            if (other.agg != null) return false;
        } else if (!agg.equals(other.agg)) return false;
        if (attr == null) {
            if (other.attr != null) return false;
        } else if (!attr.equals(other.attr)) return false;
        return true;
    }
}