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• AbstractCreator.java

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com.sun.xml.stream.buffer.AbstractCreator Maven / Gradle / Ivy

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2005-2012 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.xml.stream.buffer;

/**
 * Base class for classes that creates {@link MutableXMLStreamBuffer}
 * and from infoset in API-specific form.
 */
public class AbstractCreator extends AbstractCreatorProcessor {
    
    protected MutableXMLStreamBuffer _buffer;
    
    public void setXMLStreamBuffer(MutableXMLStreamBuffer buffer) {
        if (buffer == null) {
            throw new NullPointerException("buffer cannot be null");
        }
        setBuffer(buffer);
    }
    
    public MutableXMLStreamBuffer getXMLStreamBuffer() {
        return _buffer;
    }
    
    
    protected final void createBuffer() {
        setBuffer(new MutableXMLStreamBuffer());
    }

    /**
     * Should be called whenever a new tree is stored on the buffer.
     */
    protected final void increaseTreeCount() {
        _buffer.treeCount++;
    }

    protected final void setBuffer(MutableXMLStreamBuffer buffer) {
        _buffer = buffer;
        
        _currentStructureFragment = _buffer.getStructure();
        _structure = _currentStructureFragment.getArray();
        _structurePtr = 0;

        _currentStructureStringFragment = _buffer.getStructureStrings();
        _structureStrings = _currentStructureStringFragment.getArray();
        _structureStringsPtr = 0;

        _currentContentCharactersBufferFragment = _buffer.getContentCharactersBuffer();
        _contentCharactersBuffer = _currentContentCharactersBufferFragment.getArray();
        _contentCharactersBufferPtr = 0;
        
        _currentContentObjectFragment = _buffer.getContentObjects();
        _contentObjects = _currentContentObjectFragment.getArray();
        _contentObjectsPtr = 0;
    }
    
    protected final void setHasInternedStrings(boolean hasInternedStrings) {
        _buffer.setHasInternedStrings(hasInternedStrings);
    }
    
    protected final void storeStructure(int b) {
        _structure[_structurePtr++] = (byte)b;
        if (_structurePtr == _structure.length) {
            resizeStructure();
        }
    }
    
    protected final void resizeStructure() {
        _structurePtr = 0;
        if (_currentStructureFragment.getNext() != null) {
            _currentStructureFragment = _currentStructureFragment.getNext();
            _structure = _currentStructureFragment.getArray();
        } else {
            _structure = new byte[_structure.length];
            _currentStructureFragment = new FragmentedArray(_structure, _currentStructureFragment);
        }
    }
    
    protected final void storeStructureString(String s) {
        _structureStrings[_structureStringsPtr++] = s;
        if (_structureStringsPtr == _structureStrings.length) {
            resizeStructureStrings();
        }
    }
    
    protected final void resizeStructureStrings() {
        _structureStringsPtr = 0;
        if (_currentStructureStringFragment.getNext() != null) {
            _currentStructureStringFragment = _currentStructureStringFragment.getNext();
            _structureStrings = _currentStructureStringFragment.getArray();
        } else {
            _structureStrings = new String[_structureStrings.length];
            _currentStructureStringFragment = new FragmentedArray(_structureStrings, _currentStructureStringFragment);
        }
    }
    
    protected final void storeContentString(String s) {
        storeContentObject(s);
    }
    
    protected final void storeContentCharacters(int type, char[] ch, int start, int length) {        
        if (_contentCharactersBufferPtr + length >= _contentCharactersBuffer.length) {
            if (length >= 512) {
                storeStructure(type | CONTENT_TYPE_CHAR_ARRAY_COPY);
                storeContentCharactersCopy(ch, start, length);
                return;
            }
            resizeContentCharacters();            
        }

        if (length < CHAR_ARRAY_LENGTH_SMALL_SIZE) {
            storeStructure(type);
            storeStructure(length);
            System.arraycopy(ch, start, _contentCharactersBuffer, _contentCharactersBufferPtr, length);
            _contentCharactersBufferPtr += length;
        } else if (length < CHAR_ARRAY_LENGTH_MEDIUM_SIZE) {
            storeStructure(type | CHAR_ARRAY_LENGTH_MEDIUM);
            storeStructure(length >> 8);
            storeStructure(length & 255);
            System.arraycopy(ch, start, _contentCharactersBuffer, _contentCharactersBufferPtr, length);
            _contentCharactersBufferPtr += length;        
        } else {
            storeStructure(type | CONTENT_TYPE_CHAR_ARRAY_COPY);
            storeContentCharactersCopy(ch, start, length);
        }
    }
    
    protected final void resizeContentCharacters() {
        _contentCharactersBufferPtr = 0;
        if (_currentContentCharactersBufferFragment.getNext() != null) {
            _currentContentCharactersBufferFragment = _currentContentCharactersBufferFragment.getNext();
            _contentCharactersBuffer = _currentContentCharactersBufferFragment.getArray();
        } else {
            _contentCharactersBuffer = new char[_contentCharactersBuffer.length];
            _currentContentCharactersBufferFragment = new FragmentedArray(_contentCharactersBuffer, 
                    _currentContentCharactersBufferFragment);
        }
    }
    
    protected final void storeContentCharactersCopy(char[] ch, int start, int length) {
        char[] copyOfCh = new char[length];
        System.arraycopy(ch, start, copyOfCh, 0, length);
        storeContentObject(copyOfCh);
    }

    protected final Object peekAtContentObject() {
        return _contentObjects[_contentObjectsPtr];
    }
    
    protected final void storeContentObject(Object s) {
        _contentObjects[_contentObjectsPtr++] = s;
        if (_contentObjectsPtr == _contentObjects.length) {
            resizeContentObjects();
        }
    }
    
    protected final void resizeContentObjects() {
        _contentObjectsPtr = 0;
        if (_currentContentObjectFragment.getNext() != null) {
            _currentContentObjectFragment = _currentContentObjectFragment.getNext();
            _contentObjects = _currentContentObjectFragment.getArray();
        } else {
            _contentObjects = new Object[_contentObjects.length];
            _currentContentObjectFragment = new FragmentedArray(_contentObjects, _currentContentObjectFragment);
        }
    }    
}