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/*
* Copyright (c) 2001-2007 Sun Microsystems, Inc. All rights reserved.
*
* The Sun Project JXTA(TM) Software License
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowledgment: "This product includes software
* developed by Sun Microsystems, Inc. for JXTA(TM) technology."
* Alternately, this acknowledgment may appear in the software itself, if
* and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
* not be used to endorse or promote products derived from this software
* without prior written permission. For written permission, please contact
* Project JXTA at http://www.jxta.org.
*
* 5. Products derived from this software may not be called "JXTA", nor may
* "JXTA" appear in their name, without prior written permission of Sun.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SUN
* MICROSYSTEMS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* JXTA is a registered trademark of Sun Microsystems, Inc. in the United
* States and other countries.
*
* Please see the license information page at :
* for instructions on use of
* the license in source files.
*
* ====================================================================
*
* This software consists of voluntary contributions made by many individuals
* on behalf of Project JXTA. For more information on Project JXTA, please see
* http://www.jxta.org.
*
* This license is based on the BSD license adopted by the Apache Foundation.
*/
package net.jxta.impl.document;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import java.io.IOException;
import java.lang.reflect.UndeclaredThrowableException;
import net.jxta.document.MimeMediaType;
import net.jxta.document.StructuredDocument;
import net.jxta.document.StructuredDocumentFactory;
import net.jxta.document.StructuredDocumentFactory.Instantiator.ExtensionMapping;
import net.jxta.document.XMLDocument;
import net.jxta.impl.document.LiteXMLElement.charRange;
import net.jxta.impl.document.LiteXMLElement.tagRange;
/**
* This class is an implementation of the StructuredDocument interface using
* a simplified XML implementation.
*/
public class LiteXMLDocument extends LiteXMLElement implements XMLDocument {
/**
* {@inheritDoc}
*/
private final static class Instantiator implements StructuredDocumentFactory.TextInstantiator {
// "x-" is a mime-type convention for indicating partial or provisional
// compliance to a standard
private static final MimeMediaType[] myTypes = {
MimeMediaType.XML_DEFAULTENCODING,
MimeMediaType.valueOf("Text/x-Xml"),
MimeMediaType.valueOf("Application/Xml"),
MimeMediaType.valueOf("Application/x-Xml")
};
// these are the file extensions which are likely to contain files of
// the type I like.
private static final ExtensionMapping[] myExtensions = {
new ExtensionMapping("xml", myTypes[0]),
new ExtensionMapping("xml", (MimeMediaType) null)
};
/**
* Creates new LiteXMLDocumentInstantiator
*/
public Instantiator() {}
/**
* {@inheritDoc}
*/
public MimeMediaType[] getSupportedMimeTypes() {
return (myTypes);
}
/**
* {@inheritDoc}
*/
public ExtensionMapping[] getSupportedFileExtensions() {
return (myExtensions);
}
/**
* {@inheritDoc}
*/
public StructuredDocument newInstance(MimeMediaType mimeType, String doctype) {
return new LiteXMLDocument(mimeType, doctype);
}
/**
* {@inheritDoc}
*/
public StructuredDocument newInstance(MimeMediaType mimeType, String doctype, String value) {
return new LiteXMLDocument(mimeType, doctype, value);
}
/**
* {@inheritDoc}
*/
public StructuredDocument newInstance(MimeMediaType mimeType, InputStream source) throws IOException {
return new LiteXMLDocument(mimeType, source);
}
/**
* {@inheritDoc}
*/
public StructuredDocument newInstance(MimeMediaType mimeType, Reader source) throws IOException {
return new LiteXMLDocument(mimeType, source);
}
}
/**
* The instantiator for instances of our documents.
*/
public static final StructuredDocumentFactory.TextInstantiator INSTANTIATOR = new Instantiator();
/**
* The actual document contents.
*/
final StringBuilder docContent;
/**
* The mimetype of this document.
*/
private final MimeMediaType mimeType;
/**
* Creates new LiteXMLDocument
*/
LiteXMLDocument(MimeMediaType mimeType, String type) {
this(mimeType, type, "");
}
/**
* Creates new LiteXMLDocument with a textValue in the root element
*/
LiteXMLDocument(MimeMediaType mimeType, String type, String textValue) {
super(null, (LiteXMLElement.tagRange) null);
parent = this;
this.mimeType = mimeType;
docContent = new StringBuilder();
for (int eachChar = type.length() - 1; eachChar >= 0; eachChar--) {
if (Character.isWhitespace(type.charAt(eachChar))) {
throw new IllegalArgumentException("Root tag may not contain spaces");
}
}
if (null == textValue) {
textValue = "";
}
StringBuilder seedDoc = new StringBuilder(textValue.length() + 3 * type.length() + 128);
seedDoc.append("\n");
seedDoc.append("\n");
seedDoc.append('<');
seedDoc.append(type);
seedDoc.append('>');
seedDoc.append(textValue);
seedDoc.append("');
try {
init(new StringReader(seedDoc.toString()));
} catch (IOException caught) {
throw new UndeclaredThrowableException(caught);
}
}
/**
* Creates new LiteXMLDocument
*/
LiteXMLDocument(MimeMediaType mimeType, InputStream in) throws IOException {
super(null, (LiteXMLElement.tagRange) null);
parent = this;
this.mimeType = mimeType;
docContent = new StringBuilder();
String charset = mimeType.getParameter("charset");
if (charset == null) {
init(new InputStreamReader(in));
} else {
init(new InputStreamReader(in, charset));
}
}
/**
* Creates new LiteXMLDocument
*/
LiteXMLDocument(MimeMediaType mimeType, Reader in) throws IOException {
super(null, (LiteXMLElement.tagRange) null);
parent = this;
this.mimeType = mimeType;
docContent = new StringBuilder();
init(in);
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
try {
StringWriter stringOut = new StringWriter();
sendToWriter(stringOut);
stringOut.close();
return stringOut.toString();
} catch (IOException caught) {
throw new UndeclaredThrowableException(caught);
}
}
/**
* {@inheritDoc}
*/
public MimeMediaType getMimeType() {
return mimeType;
}
/**
* {@inheritDoc}
*/
public String getFileExtension() {
return TextDocumentCommon.Utils.getExtensionForMime(INSTANTIATOR.getSupportedFileExtensions(), getMimeType());
}
/**
* {@inheritDoc}
*/
public LiteXMLElement createElement(Object key) {
return createElement(key, null);
}
/**
* {@inheritDoc}
*/
public LiteXMLElement createElement(Object key, Object val) {
if (!(key instanceof String)) {
throw new ClassCastException(key.getClass().getName() + " not supported by createElement as key.");
}
if ((null != val) && !(val instanceof String)) {
throw new ClassCastException(val.getClass().getName() + " not supported by createElement as value.");
}
return createElement((String) key, (String) val);
}
/**
* {@inheritDoc}
*/
public LiteXMLElement createElement(String name) {
return createElement(name, (String) null);
}
/**
* {@inheritDoc}
*/
public LiteXMLElement createElement(String name, String val) {
return new LiteXMLElement(this, name, val);
}
/**
* Create a new text element as a sub-range of this document.
*
* @param loc The document range for the new element.
* @return The newly created element.
*/
protected LiteXMLElement createElement(tagRange loc) {
return new LiteXMLElement(this, loc);
}
/**
* {@inheritDoc}
*/
public Reader getReader() {
return new StringReader(toString());
}
/**
* {@inheritDoc}
*/
@Override
public LiteXMLDocument getRoot() {
return this;
}
/**
* {@inheritDoc}
*/
public InputStream getStream() throws IOException {
String charset = mimeType.getParameter("charset");
if (charset == null) {
return new ByteArrayInputStream(toString().getBytes());
} else {
return new ByteArrayInputStream(toString().getBytes(charset));
}
}
/**
* {@inheritDoc}
*/
public void sendToWriter(Writer writer) throws IOException {
String charset = mimeType.getParameter("charset");
if (charset == null) {
writer.write("\n");
} else {
writer.write("\n");
}
tagRange result = getDocType(docContent, true);
if (result.isValid()) {
writer.write(docContent.substring(result.startTag.start, result.startTag.end + 1));
writer.write('\n');
}
printNice(writer, 0, true);
}
/**
* {@inheritDoc}
*/
public void sendToStream(OutputStream stream) throws IOException {
String charset = mimeType.getParameter("charset");
Writer osw;
if (charset == null) {
osw = new OutputStreamWriter(stream);
} else {
osw = new OutputStreamWriter(stream, charset);
}
Writer out = new BufferedWriter(osw);
sendToWriter(out);
out.flush();
}
/**
* Initialises LiteXMLDocument.
*/
protected void init(Reader in) throws IOException {
loc = new tagRange();
char[] smallBuffer = new char[512];
do {
int readCount = in.read(smallBuffer);
if (readCount < 0) {
break;
}
if (readCount > 0) {
docContent.append(smallBuffer, 0, readCount);
}
} while (true);
// startTag will contain the xml declaration
loc.startTag.start = 0;
loc.startTag.end = docContent.indexOf(">");
// body is everything after the xml declaration
loc.body.start = loc.startTag.end + 1;
loc.body.end = docContent.length() - 1;
// end is the end of the doc.
loc.endTag.start = loc.body.end;
loc.endTag.end = loc.body.end;
tagRange docType = getDocType(getDocument().docContent, false);
if (docType.isValid()) {
loc = getTagRanges(getDocument().docContent, docContent.substring(docType.body.start, docType.body.end + 1)
,
docType.endTag);
} else {
loc = getTagRanges(getDocument().docContent, null, loc.body);
}
if (!loc.isValid()) {
throw new RuntimeException("Parsing error in source document.");
}
if (!loc.startTag.equals(loc.endTag)) {
addChildTags(loc.body, this); // now add the subtags
}
if (paranoidConsistencyChecking) {
checkConsistency();
}
}
protected tagRange getDocType(final StringBuilder source, boolean wholeElement) {
final String xmldoctype = "!DOCTYPE";
int start = 0;
int end = getDocument().docContent.length() - 1;
tagRange ranges = getTagRanges(source, xmldoctype, new charRange(start, end));
if (!ranges.startTag.isValid()) {
return ranges;
}
// the rest of the document will be the "end"
ranges.endTag.start = ranges.body.start;
ranges.endTag.end = ranges.body.end;
if (wholeElement) {
// this will be an empty element
ranges.body.start = ranges.startTag.end + 1;
ranges.body.end = ranges.endTag.start - 1;
} else {
ranges.body.start = ranges.startTag.start + 1 + xmldoctype.length() - 1 + 1;
ranges.startTag.end = ranges.body.start - 1;
while ((ranges.body.start < end) && // immediately followed by a delimiter or the end of the tag
Character.isWhitespace(source.charAt(ranges.body.start))) {
ranges.body.start++;
}
ranges.body.end = ranges.body.start;
while ((ranges.body.end + 1) < end) { // immediately followed by a delimiter or the end of the tag
char possibleEnd = source.charAt(ranges.body.end + 1);
if (Character.isWhitespace(possibleEnd) || ('/' == possibleEnd) || ('>' == possibleEnd)) {
break;
}
ranges.body.end++;
}
}
return ranges;
}
/**
* {@inheritDoc}
*/
@Override
LiteXMLDocument getDocument() {
return this;
}
}
