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/**
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* Copyright (C) 2009 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.model.common;
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import java.io.Serializable;
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import java.util.NoSuchElementException;
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import java.util.StringTokenizer;
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import javax.persistence.Embeddable;
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import com.ibm.lsid.MalformedLSIDException;
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/**
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* This class is copied from com.ibm.lsid.LSID, I needed to re-implement this since
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* the domain objects are required to be Serializable
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*
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*
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* @author Ben Szekely (<a href="mailto:bhszekel@us.ibm.com">bhszekel@us.ibm.com</a>)
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* @author ben.clark
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* @see com.ibm.lsid.client.LSID
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*/
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@Embeddable
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public class LSID implements Serializable {
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private static final long serialVersionUID = -3568951541851092269L;
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private String lsid;
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private String authority;
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private String namespace;
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private String object;
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private String revision;
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private LSID() { }
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/**
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* Construct a new LSID with the String representation.
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* @param String The lsid String respresentation
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*/
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public LSID(String lsid) throws MalformedLSIDException {
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if (lsid.endsWith(":")) {
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lsid = lsid.substring(0, lsid.length() - 1);
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}
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StringTokenizer st = new StringTokenizer(lsid, ":");
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// check for urn and lsid
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try {
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String urn = st.nextToken().toLowerCase();
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String l = st.nextToken().toLowerCase();
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if (!urn.equals("urn") || !l.equals("lsid")) {
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throw new MalformedLSIDException("urn:lsid: not found: [" + lsid + "]");
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}
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}
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catch (NoSuchElementException e) {
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throw new MalformedLSIDException(e, "urn:lsid: not found: [" + lsid + "]");
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}
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try {
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authority = st.nextToken().toLowerCase();
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}
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catch (NoSuchElementException e) {
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throw new MalformedLSIDException(e, "authority not found: [" + lsid + "]");
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}
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try {
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namespace = st.nextToken();
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}
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catch (NoSuchElementException e) {
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throw new MalformedLSIDException(e, "namespace not found: [" + lsid + "]");
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}
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try {
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object = st.nextToken();
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}
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catch (NoSuchElementException e) {
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throw new MalformedLSIDException(e, "object not found: [" + lsid + "]");
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}
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if (st.hasMoreTokens()) {
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revision = st.nextToken();
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}
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this.lsid = "urn:lsid:" + this.authority + ":" + this.namespace + ":" + this.object + (this.revision != null ? ":" + this.revision : "");
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}
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/**
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* Construct a new LSID with the given components
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* @param String the authority
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* @param String the namespace
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* @param String the object
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* @param String the revision, can be null
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*/
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public LSID(String authority, String namespace, String object, String revision) throws MalformedLSIDException {
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this.authority = authority.toLowerCase();
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this.namespace = namespace;//.toLowerCase();
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this.object = object;//.toLowerCase();
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if (revision != null)
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this.revision = revision;//.toLowerCase();
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lsid = "urn:lsid:" + this.authority + ":" + this.namespace + ":" + this.object + (this.revision != null ? ":" + this.revision : "");
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}
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/**
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* Returns the lsid
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* @return String The lsid String representation
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*/
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public String getLsid() {
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return lsid;
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}
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/**
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* Returns the authority component of the LSID
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* @return LSIDAuthority the authority
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*/
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public String getAuthority() {
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return authority;
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}
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/**
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* Returns the namespace component of the LSID
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* @return String
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*/
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public String getNamespace() {
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return namespace;
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}
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/**
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* Returns the object component of the LSID
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* @return String
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*/
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public String getObject() {
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return object;
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}
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/**
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* Returns the revision component of the LSID if it exists
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* @return String
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*/
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public String getRevision() {
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return revision;
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}
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public static boolean isLsid(String strLsid){
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try {
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//TODO use algorithm rather than exceptions
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new LSID(strLsid);
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return true;
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} catch (MalformedLSIDException e) {
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return false;
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}
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}
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/**
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* return the string representation
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* @return String
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*/
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public String toString() {
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return lsid;
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}
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/**
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* Two LSIDs are equal their string representations are equal disregarding case.
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*/
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public boolean equals(Object lsid) {
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if(this == lsid) {
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return true;
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} else if (lsid != null && lsid instanceof LSID) {
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LSID theLSID = (LSID)lsid;
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return theLSID.toString().equals(toString());
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} else {
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return false;
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}
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}
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}
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