org.eclipse.virgo.nano.deployer/src/main/java/org/eclipse/virgo/nano/deployer/StandardDeploymentIdentity.java

package org.eclipse.virgo.nano.deployer;

/*******************************************************************************
 * Copyright (c) 2008, 2012 VMware Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   VMware Inc. - initial contribution
 *   SAP AG - re-factoring
 *******************************************************************************/

import org.eclipse.virgo.nano.deployer.core.DeploymentIdentity;
import org.osgi.framework.Version;

/**
 * {@link StandardDeploymentIdentity} is the implementation of {@link DeploymentIdentity}.
 * <p />
 *
 * <strong>Concurrent Semantics</strong><br />
 *
 * This class is immutable and therefore thread safe.
 *
 */
public final class StandardDeploymentIdentity implements DeploymentIdentity {

    private static final long serialVersionUID = 67849234293492373L;
    
    private final String type;
    
    private final String symbolicName;
    
    private final String version;
        
    /**
     * Construct a {@link StandardDeploymentIdentity} with the given type, name, and version.
     * 
     * @param type the type of the deployed artefact
     * @param symbolicName the symbolic name of the deployed artefact
     * @param version the version of the deployed artefact
     */
    public StandardDeploymentIdentity(String type, String symbolicName, String version) {
        this.type = type;
        this.symbolicName = symbolicName;
        
        // Normalise the version to ensure accurate comparisons.
        this.version = Version.parseVersion(version).toString();
    }

    /** 
     * {@inheritDoc}
     */
    public String getType() {
        return this.type;
    }
    
    /** 
     * {@inheritDoc}
     */
    public String getSymbolicName() {
        return this.symbolicName;
    }

    /** 
     * {@inheritDoc}
     */
    public String getVersion() {
        return this.version;
    }

    /** 
     * {@inheritDoc}
     */
    @Override public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((type == null) ? 0 : type.hashCode());
        result = prime * result + ((symbolicName == null) ? 0 : symbolicName.hashCode());
        result = prime * result + ((version == null) ? 0 : version.hashCode());
        return result;
    }

    /** 
     * {@inheritDoc}
     */
    @Override public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj instanceof StandardDeploymentIdentity) {
            final StandardDeploymentIdentity other = (StandardDeploymentIdentity) obj;
            return (type        ==null ? other.type        ==null : type        .equals(other.type        ))
            &&     (symbolicName==null ? other.symbolicName==null : symbolicName.equals(other.symbolicName))
            &&     (version     ==null ? other.version     ==null : version     .equals(other.version     ))
            ;
        }
        return false;
    }

    /** 
     * {@inheritDoc}
     */
    @Override public String toString() {
        return "DeploymentIdentity(" + getType() + ", " + getSymbolicName() + ", " + getVersion() + ")";
    }

}