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org.kxml2.io.KXmlSerializer Maven / Gradle / Ivy
/* Copyright (c) 2002,2003, Stefan Haustein, Oberhausen, Rhld., Germany
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE. */
package org.kxml2.io;
import java.io.*;
import java.util.Locale;
import org.xmlpull.v1.*;
public class KXmlSerializer implements XmlSerializer {
// static final String UNDEFINED = ":";
// BEGIN android-added
/** size (in characters) for the write buffer */
private static final int WRITE_BUFFER_SIZE = 500;
// END android-added
// BEGIN android-changed
// (Guarantee that the writer is always buffered.)
private BufferedWriter writer;
// END android-changed
private boolean pending;
private int auto;
private int depth;
private String[] elementStack = new String[12];
//nsp/prefix/name
private int[] nspCounts = new int[4];
private String[] nspStack = new String[8];
//prefix/nsp; both empty are ""
private boolean[] indent = new boolean[4];
private boolean unicode;
private String encoding;
private final void check(boolean close) throws IOException {
if (!pending)
return;
depth++;
pending = false;
if (indent.length <= depth) {
boolean[] hlp = new boolean[depth + 4];
System.arraycopy(indent, 0, hlp, 0, depth);
indent = hlp;
}
indent[depth] = indent[depth - 1];
for (int i = nspCounts[depth - 1]; i < nspCounts[depth]; i++) {
writer.write(' ');
writer.write("xmlns");
if (!nspStack[i * 2].isEmpty()) {
writer.write(':');
writer.write(nspStack[i * 2]);
}
else if (getNamespace().isEmpty() && !nspStack[i * 2 + 1].isEmpty())
throw new IllegalStateException("Cannot set default namespace for elements in no namespace");
writer.write("=\"");
writeEscaped(nspStack[i * 2 + 1], '"');
writer.write('"');
}
if (nspCounts.length <= depth + 1) {
int[] hlp = new int[depth + 8];
System.arraycopy(nspCounts, 0, hlp, 0, depth + 1);
nspCounts = hlp;
}
nspCounts[depth + 1] = nspCounts[depth];
// nspCounts[depth + 2] = nspCounts[depth];
writer.write(close ? " />" : ">");
}
private final void writeEscaped(String s, int quot) throws IOException {
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
switch (c) {
case '\n':
case '\r':
case '\t':
if(quot == -1)
writer.write(c);
else
writer.write("&#"+((int) c)+';');
break;
case '&' :
writer.write("&");
break;
case '>' :
writer.write(">");
break;
case '<' :
writer.write("<");
break;
default:
if (c == quot) {
writer.write(c == '"' ? """ : "'");
break;
}
// BEGIN android-changed: refuse to output invalid characters
// See http://www.w3.org/TR/REC-xml/#charsets for definition.
// No other Java XML writer we know of does this, but no Java
// XML reader we know of is able to parse the bad output we'd
// otherwise generate.
// Note: tab, newline, and carriage return have already been
// handled above.
boolean valid = (c >= 0x20 && c <= 0xd7ff) || (c >= 0xe000 && c <= 0xfffd);
if (!valid) {
reportInvalidCharacter(c);
}
if (unicode || c < 127) {
writer.write(c);
} else {
writer.write("&#" + ((int) c) + ";");
}
// END android-changed
}
}
}
// BEGIN android-added
private static void reportInvalidCharacter(char ch) {
throw new IllegalArgumentException("Illegal character (" + Integer.toHexString((int) ch) + ")");
}
// END android-added
/*
private final void writeIndent() throws IOException {
writer.write("\r\n");
for (int i = 0; i < depth; i++)
writer.write(' ');
}*/
public void docdecl(String dd) throws IOException {
writer.write("");
}
public void endDocument() throws IOException {
while (depth > 0) {
endTag(elementStack[depth * 3 - 3], elementStack[depth * 3 - 1]);
}
flush();
}
public void entityRef(String name) throws IOException {
check(false);
writer.write('&');
writer.write(name);
writer.write(';');
}
public boolean getFeature(String name) {
//return false;
return (
"http://xmlpull.org/v1/doc/features.html#indent-output"
.equals(
name))
? indent[depth]
: false;
}
public String getPrefix(String namespace, boolean create) {
try {
return getPrefix(namespace, false, create);
}
catch (IOException e) {
throw new RuntimeException(e.toString());
}
}
private final String getPrefix(
String namespace,
boolean includeDefault,
boolean create)
throws IOException {
for (int i = nspCounts[depth + 1] * 2 - 2;
i >= 0;
i -= 2) {
if (nspStack[i + 1].equals(namespace)
&& (includeDefault || !nspStack[i].isEmpty())) {
String cand = nspStack[i];
for (int j = i + 2;
j < nspCounts[depth + 1] * 2;
j++) {
if (nspStack[j].equals(cand)) {
cand = null;
break;
}
}
if (cand != null)
return cand;
}
}
if (!create)
return null;
String prefix;
if (namespace.isEmpty())
prefix = "";
else {
do {
prefix = "n" + (auto++);
for (int i = nspCounts[depth + 1] * 2 - 2;
i >= 0;
i -= 2) {
if (prefix.equals(nspStack[i])) {
prefix = null;
break;
}
}
}
while (prefix == null);
}
boolean p = pending;
pending = false;
setPrefix(prefix, namespace);
pending = p;
return prefix;
}
public Object getProperty(String name) {
throw new RuntimeException("Unsupported property");
}
public void ignorableWhitespace(String s)
throws IOException {
text(s);
}
public void setFeature(String name, boolean value) {
if ("http://xmlpull.org/v1/doc/features.html#indent-output"
.equals(name)) {
indent[depth] = value;
}
else
throw new RuntimeException("Unsupported Feature");
}
public void setProperty(String name, Object value) {
throw new RuntimeException(
"Unsupported Property:" + value);
}
public void setPrefix(String prefix, String namespace)
throws IOException {
check(false);
if (prefix == null)
prefix = "";
if (namespace == null)
namespace = "";
String defined = getPrefix(namespace, true, false);
// boil out if already defined
if (prefix.equals(defined))
return;
int pos = (nspCounts[depth + 1]++) << 1;
if (nspStack.length < pos + 1) {
String[] hlp = new String[nspStack.length + 16];
System.arraycopy(nspStack, 0, hlp, 0, pos);
nspStack = hlp;
}
nspStack[pos++] = prefix;
nspStack[pos] = namespace;
}
public void setOutput(Writer writer) {
// BEGIN android-changed
// Guarantee that the writer is always buffered.
if (writer instanceof BufferedWriter) {
this.writer = (BufferedWriter) writer;
} else {
this.writer = new BufferedWriter(writer, WRITE_BUFFER_SIZE);
}
// END android-changed
// elementStack = new String[12]; //nsp/prefix/name
//nspCounts = new int[4];
//nspStack = new String[8]; //prefix/nsp
//indent = new boolean[4];
nspCounts[0] = 2;
nspCounts[1] = 2;
nspStack[0] = "";
nspStack[1] = "";
nspStack[2] = "xml";
nspStack[3] = "http://www.w3.org/XML/1998/namespace";
pending = false;
auto = 0;
depth = 0;
unicode = false;
}
public void setOutput(OutputStream os, String encoding)
throws IOException {
if (os == null)
throw new IllegalArgumentException("os == null");
setOutput(
encoding == null
? new OutputStreamWriter(os)
: new OutputStreamWriter(os, encoding));
this.encoding = encoding;
if (encoding != null && encoding.toLowerCase(Locale.US).startsWith("utf")) {
unicode = true;
}
}
public void startDocument(String encoding, Boolean standalone) throws IOException {
writer.write("");
}
public XmlSerializer startTag(String namespace, String name)
throws IOException {
check(false);
// if (namespace == null)
// namespace = "";
if (indent[depth]) {
writer.write("\r\n");
for (int i = 0; i < depth; i++)
writer.write(" ");
}
int esp = depth * 3;
if (elementStack.length < esp + 3) {
String[] hlp = new String[elementStack.length + 12];
System.arraycopy(elementStack, 0, hlp, 0, esp);
elementStack = hlp;
}
String prefix =
namespace == null
? ""
: getPrefix(namespace, true, true);
if (namespace != null && namespace.isEmpty()) {
for (int i = nspCounts[depth];
i < nspCounts[depth + 1];
i++) {
if (nspStack[i * 2].isEmpty() && !nspStack[i * 2 + 1].isEmpty()) {
throw new IllegalStateException("Cannot set default namespace for elements in no namespace");
}
}
}
elementStack[esp++] = namespace;
elementStack[esp++] = prefix;
elementStack[esp] = name;
writer.write('<');
if (!prefix.isEmpty()) {
writer.write(prefix);
writer.write(':');
}
writer.write(name);
pending = true;
return this;
}
public XmlSerializer attribute(
String namespace,
String name,
String value)
throws IOException {
if (!pending)
throw new IllegalStateException("illegal position for attribute");
// int cnt = nspCounts[depth];
if (namespace == null)
namespace = "";
// depth--;
// pending = false;
String prefix =
namespace.isEmpty()
? ""
: getPrefix(namespace, false, true);
// pending = true;
// depth++;
/* if (cnt != nspCounts[depth]) {
writer.write(' ');
writer.write("xmlns");
if (nspStack[cnt * 2] != null) {
writer.write(':');
writer.write(nspStack[cnt * 2]);
}
writer.write("=\"");
writeEscaped(nspStack[cnt * 2 + 1], '"');
writer.write('"');
}
*/
writer.write(' ');
if (!prefix.isEmpty()) {
writer.write(prefix);
writer.write(':');
}
writer.write(name);
writer.write('=');
char q = value.indexOf('"') == -1 ? '"' : '\'';
writer.write(q);
writeEscaped(value, q);
writer.write(q);
return this;
}
public void flush() throws IOException {
check(false);
writer.flush();
}
/*
public void close() throws IOException {
check();
writer.close();
}
*/
public XmlSerializer endTag(String namespace, String name)
throws IOException {
if (!pending)
depth--;
// if (namespace == null)
// namespace = "";
if ((namespace == null
&& elementStack[depth * 3] != null)
|| (namespace != null
&& !namespace.equals(elementStack[depth * 3]))
|| !elementStack[depth * 3 + 2].equals(name))
throw new IllegalArgumentException(" does not match start");
if (pending) {
check(true);
depth--;
}
else {
if (indent[depth + 1]) {
writer.write("\r\n");
for (int i = 0; i < depth; i++)
writer.write(" ");
}
writer.write("');
}
nspCounts[depth + 1] = nspCounts[depth];
return this;
}
public String getNamespace() {
return getDepth() == 0 ? null : elementStack[getDepth() * 3 - 3];
}
public String getName() {
return getDepth() == 0 ? null : elementStack[getDepth() * 3 - 1];
}
public int getDepth() {
return pending ? depth + 1 : depth;
}
public XmlSerializer text(String text) throws IOException {
check(false);
indent[depth] = false;
writeEscaped(text, -1);
return this;
}
public XmlSerializer text(char[] text, int start, int len)
throws IOException {
text(new String(text, start, len));
return this;
}
public void cdsect(String data) throws IOException {
check(false);
// BEGIN android-changed: ]]> is not allowed within a CDATA,
// so break and start a new one when necessary.
data = data.replace("]]>", "]]]]>");
char[] chars = data.toCharArray();
// We also aren't allowed any invalid characters.
for (char ch : chars) {
boolean valid = (ch >= 0x20 && ch <= 0xd7ff) ||
(ch == '\t' || ch == '\n' || ch == '\r') ||
(ch >= 0xe000 && ch <= 0xfffd);
if (!valid) {
reportInvalidCharacter(ch);
}
}
writer.write("");
// END android-changed
}
public void comment(String comment) throws IOException {
check(false);
writer.write("");
}
public void processingInstruction(String pi)
throws IOException {
check(false);
writer.write("");
}
}
