/* kXML 2
*
* Copyright (C) 2000, 2001, 2002
* Stefan Haustein
* D-46045 Oberhausen (Rhld.),
* Germany. All Rights Reserved.
*
* The contents of this file are subject to the "Common Public
* License" (CPL); you may not use this file except in compliance
* with the License.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific terms governing rights and limitations
* under the License.
*
* Thanks to Paul Palaszewski, Wilhelm Fitzpatrick,
* Eric Foster-Johnson, Michael Angel, and Liam Quinn for providing various
* fixes and hints for the KXML 1 parser.
* */
package org.kxml2.wap;
import java.io.*;
import java.util.*;
import org.xmlpull.v1.*;
//import com.sun.xml.parser.Parser;
/** a class for converting ("binary encoding") XML to WBXML.
* Todo:
* <ul>
* <li>Add support for processing instructions
* <li>Add support for tag and attribute tables
* <li>Add support for WBXML extensions
* </ul>
*/
public class WbxmlSerializer implements XmlSerializer {
Hashtable stringTable = new Hashtable();
OutputStream out;
ByteArrayOutputStream buf = new ByteArrayOutputStream();
ByteArrayOutputStream stringTableBuf = new ByteArrayOutputStream();
String pending;
int depth;
String name;
String namespace;
Vector attributes = new Vector();
Hashtable attrStartTable = new Hashtable();
Hashtable attrValueTable = new Hashtable();
Hashtable tagTable = new Hashtable();
public XmlSerializer attribute(String namespace, String name, String value) {
attributes.addElement(name);
attributes.addElement(value);
return this;
}
public void cdsect (String cdsect) throws IOException{
text (cdsect);
}
/* silently ignore comment */
public void comment (String comment) {
}
public void docdecl (String docdecl) {
throw new RuntimeException ("Cannot write docdecl for WBXML");
}
public void entityRef (String er) {
throw new RuntimeException ("EntityReference not supported for WBXML");
}
public int getDepth() {
return depth;
}
public boolean getFeature (String name) {
return false;
}
public String getNamespace() {
throw new RuntimeException("NYI");
}
public String getName() {
throw new RuntimeException("NYI");
}
public String getPrefix(String nsp, boolean create) {
throw new RuntimeException ("NYI");
}
public Object getProperty (String name) {
return null;
}
public void ignorableWhitespace (String sp) {
}
public void endDocument() throws IOException {
writeInt(out, stringTableBuf.size());
// write StringTable
out.write(stringTableBuf.toByteArray());
// write buf
out.write(buf.toByteArray());
// ready!
out.flush();
}
/** ATTENTION: flush cannot work since Wbxml documents cannot
need buffering. Thus, this call does nothing. */
public void flush() {
}
public void checkPending(boolean degenerated) throws IOException {
if (pending == null)
return;
int len = attributes.size();
Integer idx = (Integer) tagTable.get(pending);
// if no entry in known table, then add as literal
if (idx == null) {
buf.write(
len == 0
? (degenerated ? Wbxml.LITERAL : Wbxml.LITERAL_C)
: (degenerated ? Wbxml.LITERAL_A : Wbxml.LITERAL_AC));
writeStrT(pending);
}
else {
buf.write(
len == 0
? (degenerated ? idx.intValue() : idx.intValue() | 64)
: (degenerated
? idx.intValue() | 128
: idx.intValue() | 192));
}
for (int i = 0; i < len;) {
idx = (Integer) attrStartTable.get(attributes.elementAt(i));
if (idx == null) {
buf.write(Wbxml.LITERAL);
writeStrT((String) attributes.elementAt(i));
}
else {
buf.write(idx.intValue());
}
idx = (Integer) attrValueTable.get(attributes.elementAt(++i));
if (idx == null) {
buf.write(Wbxml.STR_I);
writeStrI(buf, (String) attributes.elementAt(i));
}
else {
buf.write(idx.intValue());
}
++i;
}
if (len > 0)
buf.write(Wbxml.END);
pending = null;
attributes.removeAllElements();
}
public void processingInstruction(String pi) {
throw new RuntimeException ("PI NYI");
}
public void setFeature(String name, boolean value) {
throw new IllegalArgumentException ("unknown feature "+name);
}
public void setOutput (Writer writer) {
throw new RuntimeException ("Wbxml requires an outputstream, no writer");
}
public void setOutput (OutputStream out, String encoding) throws IOException {
if (encoding != null) throw new IllegalArgumentException ("encoding not supported for WBXML");
this.out = out;
buf = new ByteArrayOutputStream();
stringTableBuf = new ByteArrayOutputStream();
// ok, write header
}
public void setPrefix(String prefix, String nsp) {
throw new RuntimeException("NYI");
}
public void setProperty(String property, Object value) {
throw new IllegalArgumentException ("unknown property "+property);
}
public void startDocument(String s, Boolean b) throws IOException{
out.write(0x01); // version
out.write(0x01); // unknown or missing public identifier
out.write(0x04); // iso-8859-1
}
public XmlSerializer startTag(String namespace, String name) throws IOException {
if (namespace != null && !"".equals(namespace))
throw new RuntimeException ("NSP NYI");
//current = new State(current, prefixMap, name);
checkPending(false);
pending = name;
depth++;
return this;
}
public XmlSerializer text(char[] chars, int start, int len) throws IOException {
checkPending(false);
buf.write(Wbxml.STR_I);
writeStrI(buf, new String(chars, start, len));
return this;
}
public XmlSerializer text(String text) throws IOException {
checkPending(false);
buf.write(Wbxml.STR_I);
writeStrI(buf, text);
return this;
}
public XmlSerializer endTag(String namespace, String name) throws IOException {
// current = current.prev;
if (pending != null)
checkPending(true);
else
buf.write(Wbxml.END);
depth--;
return this;
}
/** currently ignored! */
public void writeLegacy(int type, String data) {
}
// ------------- internal methods --------------------------
static void writeInt(OutputStream out, int i) throws IOException {
byte[] buf = new byte[5];
int idx = 0;
do {
buf[idx++] = (byte) (i & 0x7f);
i = i >> 7;
}
while (i != 0);
while (idx > 1) {
out.write(buf[--idx] | 0x80);
}
out.write(buf[0]);
}
static void writeStrI(OutputStream out, String s) throws IOException {
for (int i = 0; i < s.length(); i++) {
out.write((byte) s.charAt(i));
}
out.write(0);
}
void writeStrT(String s) throws IOException {
Integer idx = (Integer) stringTable.get(s);
if (idx == null) {
idx = new Integer(stringTableBuf.size());
stringTable.put(s, idx);
writeStrI(stringTableBuf, s);
stringTableBuf.flush();
}
writeInt(buf, idx.intValue());
}
/** Sets the tag table for a given page.
* The first string in the array defines tag 5, the second tag 6 etc.
* Currently, only page 0 is supported
*/
public void setTagTable(int page, String[] tagTable) {
// clear entries in tagTable!
for (int i = 0; i < tagTable.length; i++) {
if (tagTable[i] != null) {
Integer idx = new Integer(i + 5);
this.tagTable.put(tagTable[i], idx);
}
}
if (page != 0)
throw new RuntimeException("code pages curr. not supp.");
}
/** Sets the attribute start Table for a given page.
* The first string in the array defines attribute
* 5, the second attribute 6 etc.
* Currently, only page 0 is supported. Please use the
* character '=' (without quote!) as delimiter
* between the attribute name and the (start of the) value
*/
public void setAttrStartTable(int page, String[] attrStartTable) {
// clear entries in this.table!
for (int i = 0; i < attrStartTable.length; i++) {
if (attrStartTable[i] != null) {
Integer idx = new Integer(i + 5);
this.attrStartTable.put(attrStartTable[i], idx);
}
}
if (page != 0)
throw new RuntimeException("code pages curr. not supp.");
}
/** Sets the attribute value Table for a given page.
* The first string in the array defines attribute value 0x85,
* the second attribute value 0x86 etc.
* Currently, only page 0 is supported.
*/
public void setAttrValueTable(int page, String[] attrValueTable) {
// clear entries in this.table!
for (int i = 0; i < attrValueTable.length; i++) {
if (attrValueTable[i] != null) {
Integer idx = new Integer(i + 0x085);
this.attrValueTable.put(attrValueTable[i], idx);
}
}
if (page != 0)
throw new RuntimeException("code pages curr. not supp.");
}
}