com.sun.xml.fastinfoset.util.FixedEntryStringIntMap Maven / Gradle / Ivy

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/*
 * Fast Infoset ver. 0.1 software ("Software")
 * 
 * Copyright, 2004-2005 Sun Microsystems, Inc. All Rights Reserved. 
 * 
 * Software is licensed 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. See the
 * License for the specific language governing permissions and limitations.
 * 
 *    Sun supports and benefits from the global community of open source
 * developers, and thanks the community for its important contributions and
 * open standards-based technology, which Sun has adopted into many of its
 * products.
 * 
 *    Please note that portions of Software may be provided with notices and
 * open source licenses from such communities and third parties that govern the
 * use of those portions, and any licenses granted hereunder do not alter any
 * rights and obligations you may have under such open source licenses,
 * however, the disclaimer of warranty and limitation of liability provisions
 * in this License will apply to all Software in this distribution.
 * 
 *    You acknowledge that the Software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any nuclear
 * facility.
 *
 * Apache License
 * Version 2.0, January 2004
 * http://www.apache.org/licenses/
 *
 */ 


package com.sun.xml.fastinfoset.util;

import com.sun.xml.fastinfoset.CommonResourceBundle;

public class FixedEntryStringIntMap extends StringIntMap {
    
    private Entry _fixedEntry;

    public FixedEntryStringIntMap(String fixedEntry, int initialCapacity, float loadFactor) {
        super(initialCapacity, loadFactor);
        
        // Add the fixed entry
        final int hash = hashHash(fixedEntry.hashCode());
        final int tableIndex = indexFor(hash, _table.length);
        _table[tableIndex] = _fixedEntry = new Entry(fixedEntry, hash, _index++, null);
        if (_size++ >= _threshold) {
            resize(2 * _table.length);
        }
    }
    
    public FixedEntryStringIntMap(String fixedEntry, int initialCapacity) {
        this(fixedEntry, initialCapacity, DEFAULT_LOAD_FACTOR);
    }

    public FixedEntryStringIntMap(String fixedEntry) {
        this(fixedEntry, DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR);
    }

    public final void clear() {
        for (int i = 0; i < _table.length; i++) {
            _table[i] = null;
        }
        _lastEntry = NULL_ENTRY;
        
        if (_fixedEntry != null) {
            final int tableIndex = indexFor(_fixedEntry._hash, _table.length);
            _table[tableIndex] = _fixedEntry;
            _fixedEntry._next = null;
            _size = 1;
            _index = _readOnlyMapSize + 1;
        } else {
            _size = 0;
            _index = _readOnlyMapSize;
        }
    }

    public final void setReadOnlyMap(KeyIntMap readOnlyMap, boolean clear) {
        if (!(readOnlyMap instanceof FixedEntryStringIntMap)) {
            throw new IllegalArgumentException(CommonResourceBundle.getInstance().
                    getString("message.illegalClass", new Object[]{readOnlyMap}));
        }       
        
        setReadOnlyMap((FixedEntryStringIntMap)readOnlyMap, clear);
    }
    
    public final void setReadOnlyMap(FixedEntryStringIntMap readOnlyMap, boolean clear) {
        _readOnlyMap = readOnlyMap;
        if (_readOnlyMap != null) {
            readOnlyMap.removeFixedEntry();
            _readOnlyMapSize = readOnlyMap.size();
            _index = _readOnlyMapSize + _size;
            if (clear) {
                clear();
            }
        }  else {
            _readOnlyMapSize = 0;
        }     
    }
    
    private final void removeFixedEntry() {
        if (_fixedEntry != null) {
            final int tableIndex = indexFor(_fixedEntry._hash, _table.length);
            final Entry firstEntry = _table[tableIndex];
            if (firstEntry == _fixedEntry) {
                _table[tableIndex] = _fixedEntry._next;
            } else {
                Entry previousEntry = firstEntry;
                while (previousEntry._next != _fixedEntry) {
                    previousEntry = previousEntry._next;
                }
                previousEntry._next = _fixedEntry._next;
            }
            
            _fixedEntry = null;
            _size--;
        }
    }    
}