Java example source code file (LocalNameQualifiedNamesMap.java)

This example Java source code file (LocalNameQualifiedNamesMap.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

default_load_factor, entry, keyintmap, localnamequalifiednamesmap, maximum_capacity, object, qualifiedname, string

The LocalNameQualifiedNamesMap.java Java example source code

/*
 * Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 * THIS FILE WAS MODIFIED BY SUN MICROSYSTEMS, INC.
 */

package com.sun.xml.internal.fastinfoset.util;

import com.sun.xml.internal.fastinfoset.QualifiedName;
import com.sun.xml.internal.fastinfoset.CommonResourceBundle;

public class LocalNameQualifiedNamesMap extends KeyIntMap {

    private LocalNameQualifiedNamesMap _readOnlyMap;

    private int _index;

    public static class Entry {
        final String _key;
        final int _hash;
        public QualifiedName[] _value;
        public int _valueIndex;
        Entry _next;

        public Entry(String key, int hash, Entry next) {
            _key = key;
            _hash = hash;
            _next = next;
            _value = new QualifiedName[1];
        }

        public void addQualifiedName(QualifiedName name) {
            if (_valueIndex < _value.length) {
                _value[_valueIndex++] = name;
            } else if (_valueIndex == _value.length) {
                QualifiedName[] newValue = new QualifiedName[_valueIndex * 3 / 2 + 1];
                System.arraycopy(_value, 0, newValue, 0, _valueIndex);
                _value = newValue;
                _value[_valueIndex++] = name;
            }
        }
    }

    private Entry[] _table;

    public LocalNameQualifiedNamesMap(int initialCapacity, float loadFactor) {
        super(initialCapacity, loadFactor);

        _table = new Entry[_capacity];
    }

    public LocalNameQualifiedNamesMap(int initialCapacity) {
        this(initialCapacity, DEFAULT_LOAD_FACTOR);
    }

    public LocalNameQualifiedNamesMap() {
        this(DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR);
    }

    public final void clear() {
        for (int i = 0; i < _table.length; i++) {
            _table[i] = null;
        }
        _size = 0;

        if (_readOnlyMap != null) {
            _index = _readOnlyMap.getIndex();
        } else {
            _index = 0;
        }
    }

    public final void setReadOnlyMap(KeyIntMap readOnlyMap, boolean clear) {
        if (!(readOnlyMap instanceof LocalNameQualifiedNamesMap)) {
            throw new IllegalArgumentException(CommonResourceBundle.getInstance().
                    getString("message.illegalClass", new Object[]{readOnlyMap}));
        }

        setReadOnlyMap((LocalNameQualifiedNamesMap)readOnlyMap, clear);
    }

    public final void setReadOnlyMap(LocalNameQualifiedNamesMap readOnlyMap, boolean clear) {
        _readOnlyMap = readOnlyMap;
        if (_readOnlyMap != null) {
            _readOnlyMapSize = _readOnlyMap.size();
            _index = _readOnlyMap.getIndex();
            if (clear) {
                clear();
            }
        }  else {
            _readOnlyMapSize = 0;
            _index = 0;
        }
    }

    public final boolean isQNameFromReadOnlyMap(QualifiedName name) {
        return (_readOnlyMap != null && name.index <= _readOnlyMap.getIndex());
    }

    public final int getNextIndex() {
        return _index++;
    }

    public final int getIndex() {
        return _index;
    }

    public final Entry obtainEntry(String key) {
        final int hash = hashHash(key.hashCode());

        if (_readOnlyMap != null) {
            final Entry entry = _readOnlyMap.getEntry(key, hash);
            if (entry != null) {
                return entry;
            }
        }

        final int tableIndex = indexFor(hash, _table.length);
        for (Entry e = _table[tableIndex]; e != null; e = e._next) {
            if (e._hash == hash && eq(key, e._key)) {
                return e;
            }
        }

        return addEntry(key, hash, tableIndex);
    }

    public final Entry obtainDynamicEntry(String key) {
        final int hash = hashHash(key.hashCode());

        final int tableIndex = indexFor(hash, _table.length);
        for (Entry e = _table[tableIndex]; e != null; e = e._next) {
            if (e._hash == hash && eq(key, e._key)) {
                return e;
            }
        }

        return addEntry(key, hash, tableIndex);
    }

    private final Entry getEntry(String key, int hash) {
        if (_readOnlyMap != null) {
            final Entry entry = _readOnlyMap.getEntry(key, hash);
            if (entry != null) {
                return entry;
            }
        }

        final int tableIndex = indexFor(hash, _table.length);
        for (Entry e = _table[tableIndex]; e != null; e = e._next) {
            if (e._hash == hash && eq(key, e._key)) {
                return e;
            }
        }

        return null;
    }


    private final Entry addEntry(String key, int hash, int bucketIndex) {
        Entry e = _table[bucketIndex];
        _table[bucketIndex] = new Entry(key, hash, e);
        e = _table[bucketIndex];
        if (_size++ >= _threshold) {
            resize(2 * _table.length);
        }

        return e;
    }

    private final void resize(int newCapacity) {
        _capacity = newCapacity;
        Entry[] oldTable = _table;
        int oldCapacity = oldTable.length;
        if (oldCapacity == MAXIMUM_CAPACITY) {
            _threshold = Integer.MAX_VALUE;
            return;
        }

        Entry[] newTable = new Entry[_capacity];
        transfer(newTable);
        _table = newTable;
        _threshold = (int)(_capacity * _loadFactor);
    }

    private final void transfer(Entry[] newTable) {
        Entry[] src = _table;
        int newCapacity = newTable.length;
        for (int j = 0; j < src.length; j++) {
            Entry e = src[j];
            if (e != null) {
                src[j] = null;
                do {
                    Entry next = e._next;
                    int i = indexFor(e._hash, newCapacity);
                    e._next = newTable[i];
                    newTable[i] = e;
                    e = next;
                } while (e != null);
            }
        }
    }

    private final boolean eq(String x, String y) {
        return x == y || x.equals(y);
    }

}