src/share/jaxws_classes/com/sun/xml/internal/stream/buffer/MutableXMLStreamBuffer.java

Thu, 31 Aug 2017 15:18:52 +0800

author
aoqi
date
Thu, 31 Aug 2017 15:18:52 +0800
changeset 637
9c07ef4934dd
parent 397
b99d7e355d4b
parent 0
373ffda63c9a
permissions
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merge

aoqi@0 1 /*
aoqi@0 2 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0 4 *
aoqi@0 5 * This code is free software; you can redistribute it and/or modify it
aoqi@0 6 * under the terms of the GNU General Public License version 2 only, as
aoqi@0 7 * published by the Free Software Foundation. Oracle designates this
aoqi@0 8 * particular file as subject to the "Classpath" exception as provided
aoqi@0 9 * by Oracle in the LICENSE file that accompanied this code.
aoqi@0 10 *
aoqi@0 11 * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0 14 * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0 15 * accompanied this code).
aoqi@0 16 *
aoqi@0 17 * You should have received a copy of the GNU General Public License version
aoqi@0 18 * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0 20 *
aoqi@0 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0 22 * or visit www.oracle.com if you need additional information or have any
aoqi@0 23 * questions.
aoqi@0 24 */
aoqi@0 25
aoqi@0 26 package com.sun.xml.internal.stream.buffer;
aoqi@0 27
aoqi@0 28 import com.sun.xml.internal.stream.buffer.sax.Properties;
aoqi@0 29 import com.sun.xml.internal.stream.buffer.sax.SAXBufferCreator;
aoqi@0 30 import com.sun.xml.internal.stream.buffer.stax.StreamReaderBufferCreator;
aoqi@0 31 import com.sun.xml.internal.stream.buffer.stax.StreamWriterBufferCreator;
aoqi@0 32 import org.xml.sax.ContentHandler;
aoqi@0 33 import org.xml.sax.SAXException;
aoqi@0 34 import org.xml.sax.XMLReader;
aoqi@0 35
aoqi@0 36 import javax.xml.stream.XMLStreamException;
aoqi@0 37 import javax.xml.stream.XMLStreamReader;
aoqi@0 38 import javax.xml.stream.XMLStreamWriter;
aoqi@0 39 import java.io.IOException;
aoqi@0 40 import java.io.InputStream;
aoqi@0 41
aoqi@0 42 /**
aoqi@0 43 *
aoqi@0 44 * A mutable stream-based buffer of an XML infoset.
aoqi@0 45 *
aoqi@0 46 * <p>
aoqi@0 47 * A MutableXMLStreamBuffer is created using specific SAX and StAX-based
aoqi@0 48 * creators. Utility methods on MutableXMLStreamBuffer are provided for
aoqi@0 49 * such functionality that utilize SAX and StAX-based creators.
aoqi@0 50 *
aoqi@0 51 * <p>
aoqi@0 52 * Once instantiated the same instance of a MutableXMLStreamBuffer may be reused for
aoqi@0 53 * creation to reduce the amount of Objects instantiated and garbage
aoqi@0 54 * collected that are required for internally representing an XML infoset.
aoqi@0 55 *
aoqi@0 56 * <p>
aoqi@0 57 * A MutableXMLStreamBuffer is not designed to be created and processed
aoqi@0 58 * concurrently. If done so unspecified behaviour may occur.
aoqi@0 59 */
aoqi@0 60 public class MutableXMLStreamBuffer extends XMLStreamBuffer {
aoqi@0 61 /**
aoqi@0 62 * The default array size for the arrays used in internal representation
aoqi@0 63 * of the XML infoset.
aoqi@0 64 */
aoqi@0 65 public static final int DEFAULT_ARRAY_SIZE = 512;
aoqi@0 66
aoqi@0 67 /**
aoqi@0 68 * Create a new MutableXMLStreamBuffer using the
aoqi@0 69 * {@link MutableXMLStreamBuffer#DEFAULT_ARRAY_SIZE}.
aoqi@0 70 */
aoqi@0 71 public MutableXMLStreamBuffer() {
aoqi@0 72 this(DEFAULT_ARRAY_SIZE);
aoqi@0 73 }
aoqi@0 74
aoqi@0 75 /**
aoqi@0 76 * Set the system identifier for this buffer.
aoqi@0 77 * @param systemId The system identifier.
aoqi@0 78 */
aoqi@0 79 public void setSystemId(String systemId) {
aoqi@0 80 this.systemId = systemId;
aoqi@0 81 }
aoqi@0 82
aoqi@0 83 /**
aoqi@0 84 * Create a new MutableXMLStreamBuffer.
aoqi@0 85 *
aoqi@0 86 * @param size
aoqi@0 87 * The size of the arrays used in the internal representation
aoqi@0 88 * of the XML infoset.
aoqi@0 89 * @throws NegativeArraySizeException
aoqi@0 90 * If the <code>size</code> argument is less than <code>0</code>.
aoqi@0 91 */
aoqi@0 92 public MutableXMLStreamBuffer(int size) {
aoqi@0 93 _structure = new FragmentedArray<byte[]>(new byte[size]);
aoqi@0 94 _structureStrings = new FragmentedArray<String[]>(new String[size]);
aoqi@0 95 _contentCharactersBuffer = new FragmentedArray<char[]>(new char[4096]);
aoqi@0 96 _contentObjects = new FragmentedArray<Object[]>(new Object[size]);
aoqi@0 97
aoqi@0 98 // Set the first element of structure array to indicate an empty buffer
aoqi@0 99 // that has not been created
aoqi@0 100 _structure.getArray()[0] = (byte) AbstractCreatorProcessor.T_END;
aoqi@0 101 }
aoqi@0 102
aoqi@0 103 /**
aoqi@0 104 * Create contents of a buffer from a XMLStreamReader.
aoqi@0 105 *
aoqi@0 106 * <p>
aoqi@0 107 * The MutableXMLStreamBuffer is reset (see {@link #reset}) before creation.
aoqi@0 108 *
aoqi@0 109 * <p>
aoqi@0 110 * The MutableXMLStreamBuffer is created by consuming the events on the XMLStreamReader using
aoqi@0 111 * an instance of {@link StreamReaderBufferCreator}.
aoqi@0 112 *
aoqi@0 113 * @param reader
aoqi@0 114 * A XMLStreamReader to read from to create.
aoqi@0 115 */
aoqi@0 116 public void createFromXMLStreamReader(XMLStreamReader reader) throws XMLStreamException {
aoqi@0 117 reset();
aoqi@0 118 StreamReaderBufferCreator c = new StreamReaderBufferCreator(this);
aoqi@0 119 c.create(reader);
aoqi@0 120 }
aoqi@0 121
aoqi@0 122 /**
aoqi@0 123 * Create contents of a buffer from a XMLStreamWriter.
aoqi@0 124 *
aoqi@0 125 * <p>
aoqi@0 126 * The MutableXMLStreamBuffer is reset (see {@link #reset}) before creation.
aoqi@0 127 *
aoqi@0 128 * <p>
aoqi@0 129 * The MutableXMLStreamBuffer is created by consuming events on a XMLStreamWriter using
aoqi@0 130 * an instance of {@link StreamWriterBufferCreator}.
aoqi@0 131 */
aoqi@0 132 public XMLStreamWriter createFromXMLStreamWriter() {
aoqi@0 133 reset();
aoqi@0 134 return new StreamWriterBufferCreator(this);
aoqi@0 135 }
aoqi@0 136
aoqi@0 137 /**
aoqi@0 138 * Create contents of a buffer from a {@link SAXBufferCreator}.
aoqi@0 139 *
aoqi@0 140 * <p>
aoqi@0 141 * The MutableXMLStreamBuffer is reset (see {@link #reset}) before creation.
aoqi@0 142 *
aoqi@0 143 * <p>
aoqi@0 144 * The MutableXMLStreamBuffer is created by consuming events from a {@link ContentHandler} using
aoqi@0 145 * an instance of {@link SAXBufferCreator}.
aoqi@0 146 *
aoqi@0 147 * @return The {@link SAXBufferCreator} to create from.
aoqi@0 148 */
aoqi@0 149 public SAXBufferCreator createFromSAXBufferCreator() {
aoqi@0 150 reset();
aoqi@0 151 SAXBufferCreator c = new SAXBufferCreator();
aoqi@0 152 c.setBuffer(this);
aoqi@0 153 return c;
aoqi@0 154 }
aoqi@0 155
aoqi@0 156 /**
aoqi@0 157 * Create contents of a buffer from a {@link XMLReader} and {@link InputStream}.
aoqi@0 158 *
aoqi@0 159 * <p>
aoqi@0 160 * The MutableXMLStreamBuffer is reset (see {@link #reset}) before creation.
aoqi@0 161 *
aoqi@0 162 * <p>
aoqi@0 163 * The MutableXMLStreamBuffer is created by using an instance of {@link SAXBufferCreator}
aoqi@0 164 * and registering associated handlers on the {@link XMLReader}.
aoqi@0 165 *
aoqi@0 166 * @param reader
aoqi@0 167 * The {@link XMLReader} to use for parsing.
aoqi@0 168 * @param in
aoqi@0 169 * The {@link InputStream} to be parsed.
aoqi@0 170 */
aoqi@0 171 public void createFromXMLReader(XMLReader reader, InputStream in) throws SAXException, IOException {
aoqi@0 172 createFromXMLReader(reader, in, null);
aoqi@0 173 }
aoqi@0 174
aoqi@0 175 /**
aoqi@0 176 * Create contents of a buffer from a {@link XMLReader} and {@link InputStream}.
aoqi@0 177 *
aoqi@0 178 * <p>
aoqi@0 179 * The MutableXMLStreamBuffer is reset (see {@link #reset}) before creation.
aoqi@0 180 *
aoqi@0 181 * <p>
aoqi@0 182 * The MutableXMLStreamBuffer is created by using an instance of {@link SAXBufferCreator}
aoqi@0 183 * and registering associated handlers on the {@link XMLReader}.
aoqi@0 184 *
aoqi@0 185 * @param reader
aoqi@0 186 * The {@link XMLReader} to use for parsing.
aoqi@0 187 * @param in
aoqi@0 188 * The {@link InputStream} to be parsed.
aoqi@0 189 * @param systemId
aoqi@0 190 * The system ID of the input stream.
aoqi@0 191 */
aoqi@0 192 public void createFromXMLReader(XMLReader reader, InputStream in, String systemId) throws SAXException, IOException {
aoqi@0 193 reset();
aoqi@0 194 SAXBufferCreator c = new SAXBufferCreator(this);
aoqi@0 195
aoqi@0 196 reader.setContentHandler(c);
aoqi@0 197 reader.setDTDHandler(c);
aoqi@0 198 reader.setProperty(Properties.LEXICAL_HANDLER_PROPERTY, c);
aoqi@0 199
aoqi@0 200 c.create(reader, in, systemId);
aoqi@0 201 }
aoqi@0 202
aoqi@0 203 /**
aoqi@0 204 * Reset the MutableXMLStreamBuffer.
aoqi@0 205 *
aoqi@0 206 * <p>
aoqi@0 207 * This method will reset the MutableXMLStreamBuffer to a state of being "uncreated"
aoqi@0 208 * similar to the state of a newly instantiated MutableXMLStreamBuffer.
aoqi@0 209 *
aoqi@0 210 * <p>
aoqi@0 211 * As many Objects as possible will be retained for reuse in future creation.
aoqi@0 212 */
aoqi@0 213 public void reset() {
aoqi@0 214 // Reset the ptrs in arrays to 0
aoqi@0 215 _structurePtr =
aoqi@0 216 _structureStringsPtr =
aoqi@0 217 _contentCharactersBufferPtr =
aoqi@0 218 _contentObjectsPtr = 0;
aoqi@0 219
aoqi@0 220 // Set the first element of structure array to indicate an empty buffer
aoqi@0 221 // that has not been created
aoqi@0 222 _structure.getArray()[0] = (byte)AbstractCreatorProcessor.T_END;
aoqi@0 223
aoqi@0 224 // Clean up content objects
aoqi@0 225 _contentObjects.setNext(null);
aoqi@0 226 final Object[] o = _contentObjects.getArray();
aoqi@0 227 for (int i = 0; i < o.length; i++) {
aoqi@0 228 if (o[i] != null) {
aoqi@0 229 o[i] = null;
aoqi@0 230 } else {
aoqi@0 231 break;
aoqi@0 232 }
aoqi@0 233 }
aoqi@0 234
aoqi@0 235 treeCount = 0;
aoqi@0 236
aoqi@0 237 /*
aoqi@0 238 * TODO consider truncating the size of _structureStrings and
aoqi@0 239 * _contentCharactersBuffer to limit the memory used by the buffer
aoqi@0 240 */
aoqi@0 241 }
aoqi@0 242
aoqi@0 243
aoqi@0 244 protected void setHasInternedStrings(boolean hasInternedStrings) {
aoqi@0 245 _hasInternedStrings = hasInternedStrings;
aoqi@0 246 }
aoqi@0 247 }

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