BaseArtifactRef.java

/*
 * Copyright 2013 NGDATA nv
 * Copyright 2008 Outerthought bvba and Schaubroeck nv
 *
 * 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.lilyproject.runtime.repository;

public abstract class BaseArtifactRef implements ArtifactRef {
    private final String id;
    private final String version;
    private final int hashCode;

    protected BaseArtifactRef(String id, String version) {
        this.id = id;
        this.version = version;
        this.hashCode = (id + version).hashCode();
    }

    public String getId() {
        return id;
    }

    public String getVersion() {
        return version;
    }

    public boolean equals(Object obj) {
        if (!(obj instanceof ArtifactRef)) {
            return false;
        }

        ArtifactRef other = (ArtifactRef)obj;
        return other.getId().equals(getId()) && other.getVersion().equals(version);
    }

    public int hashCode() {
        return hashCode;
    }

}