JDK14/Java14源码在线阅读

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
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package com.sun.org.apache.xalan.internal.xsltc.compiler;

/**
 * @author Jacek Ambroziak
 * @author Santiago Pericas-Geertsen
 * @author Morten Jorgensen
 */
final class QName {
    private final String _localname;
    private String _prefix;
    private String _namespace;
    private String _stringRep;
    private int    _hashCode;

    public QName(String namespace, String prefix, String localname) {
        _namespace = namespace;
        _prefix    = prefix;
        _localname = localname;

        _stringRep =
            (namespace != null && !namespace.equals(Constants.EMPTYSTRING)) ?
            (namespace + ':' + localname) : localname;

        _hashCode  = _stringRep.hashCode() + 19; // cached for speed
    }

    public void clearNamespace() {
        _namespace = Constants.EMPTYSTRING;
    }

    public String toString() {
        return _stringRep;
    }

    public String getStringRep() {
        return _stringRep;
    }

    public boolean equals(Object other) {
        return (this == other)
                   || (other instanceof QName
                           && _stringRep.equals(((QName) other).getStringRep()));
    }

    public String getLocalPart() {
        return _localname;
    }

    public String getNamespace() {
        return _namespace;

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