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XML Schema Object Model (XSOM) is a Java library that allows applications to easily parse XML Schema documents and inspect information in them. It is expected to be useful for applications that need to take XML Schema as an input.

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/*
 * Copyright (c) 1997, 2022 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.xml.xsom.impl;

import com.sun.xml.xsom.XSDeclaration;

import java.util.Comparator;

/**
 * UName.
 * 
 * @author Kohsuke Kawaguchi ([email protected])
 */
public final class UName {
    /**
     * @param _nsUri
     *      Use "" to indicate the no namespace.
     */
    public UName( String _nsUri, String _localName, String _qname ) {
        if(_nsUri==null || _localName==null || _qname==null) {
            throw new NullPointerException(_nsUri+" "+_localName+" "+_qname);
        }
        this.nsUri = _nsUri.intern();
        this.localName = _localName.intern();
        this.qname = _qname.intern();
    }
    
    public UName( String nsUri, String localName ) {
        this(nsUri,localName,localName);
    }

    public UName(XSDeclaration decl) {
        this(decl.getTargetNamespace(),decl.getName());
    }

    private final String nsUri;
    private final String localName;
    private final String qname;
    
    public String getName() { return localName; }
    public String getNamespaceURI() { return nsUri; }
    public String getQualifiedName() { return qname; }


    // Issue 540; XSComplexType.getAttributeUse(String,String) always return null
    // UName was used in HashMap without overriden equals and hashCode methods.

    @Override
    public boolean equals(Object obj) {
        if(obj instanceof UName) {
            UName u = (UName)obj;

            return ((this.getName().compareTo(u.getName()) == 0) &&
                    (this.getNamespaceURI().compareTo(u.getNamespaceURI()) == 0) &&
                    (this.getQualifiedName().compareTo(u.getQualifiedName()) == 0));
        } else {
            return false;
        }
    }

    @Override
    public int hashCode() {
        int hash = 7;
        hash = 13 * hash + (this.nsUri != null ? this.nsUri.hashCode() : 0);
        hash = 13 * hash + (this.localName != null ? this.localName.hashCode() : 0);
        hash = 13 * hash + (this.qname != null ? this.qname.hashCode() : 0);
        return hash;
    }

    /**
     * Compares {@link UName}s by their names.
     */
    public static final Comparator comparator = new Comparator() {
        public int compare(UName lhs, UName rhs) {
            int r = lhs.nsUri.compareTo(rhs.nsUri);
            if(r!=0)    return r;
            return lhs.localName.compareTo(rhs.localName);
        }
    };
}