org.xmlpull.renamed.MXSerializer Maven / Gradle / Ivy
/*
* Copyright (C) 2010 Ryszard Wiśniewski
* Copyright (C) 2010 Connor Tumbleson
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.xmlpull.renamed;
import org.xmlpull.v1.XmlSerializer;
import java.io.*;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
/**
* Implementation of XmlSerializer interface from XmlPull V1 API. This
* implementation is optimized for performance and low memory footprint.
*
*
* Implemented features:
*
* - FEATURE_NAMES_INTERNED - when enabled all returned names (namespaces,
* prefixes) will be interned and it is required that all names passed as
* arguments MUST be interned
*
- FEATURE_SERIALIZER_ATTVALUE_USE_APOSTROPHE
*
*
* Implemented properties:
*
* - PROPERTY_SERIALIZER_INDENTATION
*
- PROPERTY_SERIALIZER_LINE_SEPARATOR
*
*
*/
public class MXSerializer implements XmlSerializer {
protected final static String XML_URI = "http://www.w3.org/XML/1998/namespace";
protected final static String XMLNS_URI = "http://www.w3.org/2000/xmlns/";
private static final boolean TRACE_SIZING = false;
private static final boolean TRACE_ESCAPING = false;
protected final String FEATURE_SERIALIZER_ATTVALUE_USE_APOSTROPHE = "http://xmlpull.org/v1/doc/features.html#serializer-attvalue-use-apostrophe";
protected final String FEATURE_NAMES_INTERNED = "http://xmlpull.org/v1/doc/features.html#names-interned";
protected final String PROPERTY_SERIALIZER_INDENTATION = "http://xmlpull.org/v1/doc/properties.html#serializer-indentation";
protected final String PROPERTY_SERIALIZER_LINE_SEPARATOR = "http://xmlpull.org/v1/doc/properties.html#serializer-line-separator";
protected final static String PROPERTY_LOCATION = "http://xmlpull.org/v1/doc/properties.html#location";
// properties/features
protected boolean namesInterned;
protected boolean attributeUseApostrophe;
protected String indentationString = null; // " ";
protected String lineSeparator = "\n";
protected String location;
protected Writer out;
protected int autoDeclaredPrefixes;
protected int depth = 0;
// element stack
protected String[] elNamespace = new String[2];
protected String[] elName = new String[elNamespace.length];
protected String[] elPrefix = new String[elNamespace.length];
protected int[] elNamespaceCount = new int[elNamespace.length];
// namespace stack
protected int namespaceEnd = 0;
protected String[] namespacePrefix = new String[8];
protected String[] namespaceUri = new String[namespacePrefix.length];
protected boolean finished;
protected boolean pastRoot;
protected boolean setPrefixCalled;
protected boolean startTagIncomplete;
protected boolean doIndent;
protected boolean seenTag;
protected boolean seenBracket;
protected boolean seenBracketBracket;
// buffer output if needed to write escaped String see text(String)
private static final int BUF_LEN = Runtime.getRuntime().freeMemory() > 1000000L ? 8 * 1024 : 256;
protected char[] buf = new char[BUF_LEN];
protected static final String[] precomputedPrefixes;
static {
precomputedPrefixes = new String[32]; // arbitrary number ...
for (int i = 0; i < precomputedPrefixes.length; i++) {
precomputedPrefixes[i] = ("n" + i).intern();
}
}
private final boolean checkNamesInterned = false;
private void checkInterning(String name) {
if (namesInterned && !Objects.equals(name, name.intern())) {
throw new IllegalArgumentException("all names passed as arguments must be interned"
+ "when NAMES INTERNED feature is enabled");
}
}
protected void reset() {
location = null;
out = null;
autoDeclaredPrefixes = 0;
depth = 0;
// nullify references on all levels to allow it to be GCed
for (int i = 0; i < elNamespaceCount.length; i++) {
elName[i] = null;
elPrefix[i] = null;
elNamespace[i] = null;
elNamespaceCount[i] = 2;
}
namespaceEnd = 0;
// TODO: how to prevent from reporting this namespace?
// this is special namespace declared for consistency with XML infoset
namespacePrefix[namespaceEnd] = "xmlns";
namespaceUri[namespaceEnd] = XMLNS_URI;
++namespaceEnd;
namespacePrefix[namespaceEnd] = "xml";
namespaceUri[namespaceEnd] = XML_URI;
++namespaceEnd;
finished = false;
pastRoot = false;
setPrefixCalled = false;
startTagIncomplete = false;
seenTag = false;
seenBracket = false;
seenBracketBracket = false;
}
protected void ensureElementsCapacity() {
final int elStackSize = elName.length;
final int newSize = (depth >= 7 ? 2 * depth : 8) + 2;
if (TRACE_SIZING) {
System.err.println(getClass().getName() + " elStackSize "
+ elStackSize + " ==> " + newSize);
}
final boolean needsCopying = elStackSize > 0;
String[] arr;
// reuse arr local variable slot
arr = new String[newSize];
if (needsCopying)
System.arraycopy(elName, 0, arr, 0, elStackSize);
elName = arr;
arr = new String[newSize];
if (needsCopying)
System.arraycopy(elPrefix, 0, arr, 0, elStackSize);
elPrefix = arr;
arr = new String[newSize];
if (needsCopying)
System.arraycopy(elNamespace, 0, arr, 0, elStackSize);
elNamespace = arr;
final int[] iarr = new int[newSize];
if (needsCopying) {
System.arraycopy(elNamespaceCount, 0, iarr, 0, elStackSize);
} else {
// special initialization
iarr[0] = 0;
}
elNamespaceCount = iarr;
}
protected void ensureNamespacesCapacity() { // int size) {
final int newSize = namespaceEnd > 7 ? 2 * namespaceEnd : 8;
if (TRACE_SIZING) {
System.err.println(getClass().getName() + " namespaceSize " + namespacePrefix.length + " ==> " + newSize);
}
final String[] newNamespacePrefix = new String[newSize];
final String[] newNamespaceUri = new String[newSize];
if (namespacePrefix != null) {
System.arraycopy(namespacePrefix, 0, newNamespacePrefix, 0, namespaceEnd);
System.arraycopy(namespaceUri, 0, newNamespaceUri, 0, namespaceEnd);
}
namespacePrefix = newNamespacePrefix;
namespaceUri = newNamespaceUri;
}
@Override
public void setFeature(String name, boolean state)
throws IllegalArgumentException, IllegalStateException {
if (name == null) {
throw new IllegalArgumentException("feature name can not be null");
}
if (FEATURE_NAMES_INTERNED.equals(name)) {
namesInterned = state;
} else if (FEATURE_SERIALIZER_ATTVALUE_USE_APOSTROPHE.equals(name)) {
attributeUseApostrophe = state;
} else {
throw new IllegalStateException("unsupported feature " + name);
}
}
@Override
public boolean getFeature(String name) throws IllegalArgumentException {
if (name == null) {
throw new IllegalArgumentException("feature name can not be null");
}
if (FEATURE_NAMES_INTERNED.equals(name)) {
return namesInterned;
} else if (FEATURE_SERIALIZER_ATTVALUE_USE_APOSTROPHE.equals(name)) {
return attributeUseApostrophe;
} else {
return false;
}
}
// precomputed variables to simplify writing indentation
protected int offsetNewLine;
protected int indentationJump;
protected char[] indentationBuf;
protected int maxIndentLevel;
protected boolean writeLineSepartor; // should end-of-line be written
protected boolean writeIndentation; // is indentation used?
/**
* For maximum efficiency when writing indents the required output is
* pre-computed This is internal function that recomputes buffer after user
* requested chnages.
*/
protected void rebuildIndentationBuf() {
if (!doIndent)
return;
final int maxIndent = 65; // hardcoded maximum indentation size in characters
int bufSize = 0;
offsetNewLine = 0;
if (writeLineSepartor) {
offsetNewLine = lineSeparator.length();
bufSize += offsetNewLine;
}
maxIndentLevel = 0;
if (writeIndentation) {
indentationJump = indentationString.length();
maxIndentLevel = maxIndent / indentationJump;
bufSize += maxIndentLevel * indentationJump;
}
if (indentationBuf == null || indentationBuf.length < bufSize) {
indentationBuf = new char[bufSize + 8];
}
int bufPos = 0;
if (writeLineSepartor) {
for (int i = 0; i < lineSeparator.length(); i++) {
indentationBuf[bufPos++] = lineSeparator.charAt(i);
}
}
if (writeIndentation) {
for (int i = 0; i < maxIndentLevel; i++) {
for (int j = 0; j < indentationString.length(); j++) {
indentationBuf[bufPos++] = indentationString.charAt(j);
}
}
}
}
protected void writeIndent() throws IOException {
final int start = writeLineSepartor ? 0 : offsetNewLine;
final int level = Math.min(depth, maxIndentLevel);
out.write(indentationBuf, start, ((level - 1) * indentationJump) + offsetNewLine);
}
@Override
public void setProperty(String name, Object value)
throws IllegalArgumentException, IllegalStateException {
if (name == null) {
throw new IllegalArgumentException("property name can not be null");
}
switch (name) {
case PROPERTY_SERIALIZER_INDENTATION:
indentationString = (String) value;
break;
case PROPERTY_SERIALIZER_LINE_SEPARATOR:
lineSeparator = (String) value;
break;
case PROPERTY_LOCATION:
location = (String) value;
break;
default:
throw new IllegalStateException("unsupported property " + name);
}
writeLineSepartor = lineSeparator != null && lineSeparator.length() > 0;
writeIndentation = indentationString != null
&& indentationString.length() > 0;
// optimize - do not write when nothing to write ...
doIndent = indentationString != null
&& (writeLineSepartor || writeIndentation);
// NOTE: when indentationString == null there is no indentation
// (even though writeLineSeparator may be true ...)
rebuildIndentationBuf();
seenTag = false; // for consistency
}
@Override
public Object getProperty(String name) throws IllegalArgumentException {
if (name == null) {
throw new IllegalArgumentException("property name can not be null");
}
switch (name) {
case PROPERTY_SERIALIZER_INDENTATION:
return indentationString;
case PROPERTY_SERIALIZER_LINE_SEPARATOR:
return lineSeparator;
case PROPERTY_LOCATION:
return location;
default:
return null;
}
}
private String getLocation() {
return location != null ? " @" + location : "";
}
// this is special method that can be accessed directly to retrieve Writer
// serializer is using
public Writer getWriter() {
return out;
}
@Override
public void setOutput(Writer writer) {
reset();
out = writer;
}
@Override
public void setOutput(OutputStream os, String encoding) throws IOException {
if (os == null)
throw new IllegalArgumentException("output stream can not be null");
reset();
if (encoding != null) {
out = new OutputStreamWriter(os, encoding);
} else {
out = new OutputStreamWriter(os);
}
}
@Override
public void startDocument(String encoding, Boolean standalone)
throws IOException {
if (attributeUseApostrophe) {
out.write("");
}
@Override
public void endDocument() throws IOException {
// close all unclosed tag;
while (depth > 0) {
endTag(elNamespace[depth], elName[depth]);
}
finished = pastRoot = startTagIncomplete = true;
out.flush();
}
@Override
public void setPrefix(String prefix, String namespace) throws IOException {
if (startTagIncomplete)
closeStartTag();
if (prefix == null) {
prefix = "";
}
if (!namesInterned) {
prefix = prefix.intern(); // will throw NPE if prefix==null
} else if (checkNamesInterned) {
checkInterning(prefix);
} else if (prefix == null) {
throw new IllegalArgumentException("prefix must be not null" + getLocation());
}
if (!namesInterned) {
namespace = namespace.intern();
} else if (checkNamesInterned) {
checkInterning(namespace);
} else if (namespace == null) {
throw new IllegalArgumentException("namespace must be not null" + getLocation());
}
if (namespaceEnd >= namespacePrefix.length) {
ensureNamespacesCapacity();
}
namespacePrefix[namespaceEnd] = prefix;
namespaceUri[namespaceEnd] = namespace;
++namespaceEnd;
setPrefixCalled = true;
}
protected String lookupOrDeclarePrefix(String namespace) {
return getPrefix(namespace, true);
}
@Override
public String getPrefix(String namespace, boolean generatePrefix) {
return getPrefix(namespace, generatePrefix, false);
}
protected String getPrefix(String namespace, boolean generatePrefix,
boolean nonEmpty) {
if (!namesInterned) {
// when String is interned we can do much faster namespace stack lookups ...
namespace = namespace.intern();
} else if (checkNamesInterned) {
checkInterning(namespace);
}
if (namespace == null) {
throw new IllegalArgumentException("namespace must be not null" + getLocation());
} else if (namespace.length() == 0) {
throw new IllegalArgumentException("default namespace cannot have prefix" + getLocation());
}
// first check if namespace is already in scope
for (int i = namespaceEnd - 1; i >= 0; --i) {
if (namespace.equals(namespaceUri[i])) {
final String prefix = namespacePrefix[i];
if (nonEmpty && prefix.length() == 0) {
continue;
}
return prefix;
}
}
// so not found it ...
if (!generatePrefix) {
return null;
}
return generatePrefix(namespace);
}
private String generatePrefix(String namespace) {
++autoDeclaredPrefixes;
// fast lookup uses table that was pre-initialized in static{} ....
final String prefix = autoDeclaredPrefixes < precomputedPrefixes.length
? precomputedPrefixes[autoDeclaredPrefixes]
: ("n" + autoDeclaredPrefixes).intern();
// declare prefix
if (namespaceEnd >= namespacePrefix.length) {
ensureNamespacesCapacity();
}
namespacePrefix[namespaceEnd] = prefix;
namespaceUri[namespaceEnd] = namespace;
++namespaceEnd;
return prefix;
}
@Override
public int getDepth() {
return depth;
}
@Override
public String getNamespace() {
return elNamespace[depth];
}
@Override
public String getName() {
return elName[depth];
}
@Override
public XmlSerializer startTag(String namespace, String name)
throws IOException {
if (startTagIncomplete) {
closeStartTag();
}
seenBracket = seenBracketBracket = false;
++depth;
if (doIndent && depth > 0 && seenTag) {
writeIndent();
}
seenTag = true;
setPrefixCalled = false;
startTagIncomplete = true;
if ((depth + 1) >= elName.length) {
ensureElementsCapacity();
}
if (checkNamesInterned && namesInterned)
checkInterning(namespace);
elNamespace[depth] = (namesInterned || namespace == null) ? namespace : namespace.intern();
if (checkNamesInterned && namesInterned)
checkInterning(name);
elName[depth] = (namesInterned || name == null) ? name : name.intern();
if (out == null) {
throw new IllegalStateException("setOutput() must called set before serialization can start");
}
out.write('<');
if (namespace != null) {
if (namespace.length() > 0) {
// in future make this algo a feature on serializer
String prefix = null;
if (depth > 0 && (namespaceEnd - elNamespaceCount[depth - 1]) == 1) {
// if only one prefix was declared un-declare it if the
// prefix is already declared on parent el with the same URI
String uri = namespaceUri[namespaceEnd - 1];
if (uri == namespace || uri.equals(namespace)) {
String elPfx = namespacePrefix[namespaceEnd - 1];
for (int pos = elNamespaceCount[depth - 1] - 1; pos >= 2; --pos) {
String pf = namespacePrefix[pos];
if (pf == elPfx || pf.equals(elPfx)) {
String n = namespaceUri[pos];
if (n == uri || n.equals(uri)) {
--namespaceEnd; // un-declare namespace: this is kludge!
prefix = elPfx;
}
break;
}
}
}
}
if (prefix == null) {
prefix = lookupOrDeclarePrefix(namespace);
}
// make sure that default ("") namespace to not print ":"
if (prefix.length() > 0) {
elPrefix[depth] = prefix;
out.write(prefix);
out.write(':');
} else {
elPrefix[depth] = "";
}
} else {
// make sure that default namespace can be declared
for (int i = namespaceEnd - 1; i >= 0; --i) {
if (namespacePrefix[i] == "") {
final String uri = namespaceUri[i];
if (uri == null) {
setPrefix("", "");
} else if (uri.length() > 0) {
throw new IllegalStateException("start tag can not be written in empty default namespace "
+ "as default namespace is currently bound to '"
+ uri + "'" + getLocation());
}
break;
}
}
elPrefix[depth] = "";
}
} else {
elPrefix[depth] = "";
}
out.write(name);
return this;
}
@Override
public XmlSerializer attribute(String namespace, String name, String value)
throws IOException {
if (!startTagIncomplete) {
throw new IllegalArgumentException("startTag() must be called before attribute()" + getLocation());
}
out.write(' ');
if (namespace != null && namespace.length() > 0) {
if (!namesInterned) {
namespace = namespace.intern();
} else if (checkNamesInterned) {
checkInterning(namespace);
}
String prefix = getPrefix(namespace, false, true);
if (prefix == null) {
// needs to declare prefix to hold default namespace
// NOTE: attributes such as a='b' are in NO namespace
prefix = generatePrefix(namespace);
}
out.write(prefix);
out.write(':');
}
out.write(name);
out.write('=');
out.write(attributeUseApostrophe ? '\'' : '"');
writeAttributeValue(value, out);
out.write(attributeUseApostrophe ? '\'' : '"');
return this;
}
protected void closeStartTag() throws IOException {
if (finished) {
throw new IllegalArgumentException("trying to write past already finished output"
+ getLocation());
}
if (seenBracket) {
seenBracket = seenBracketBracket = false;
}
if (startTagIncomplete || setPrefixCalled) {
if (setPrefixCalled) {
throw new IllegalArgumentException("startTag() must be called immediately after setPrefix()"
+ getLocation());
}
if (!startTagIncomplete) {
throw new IllegalArgumentException("trying to close start tag that is not opened"
+ getLocation());
}
// write all namespace declarations!
writeNamespaceDeclarations();
out.write('>');
elNamespaceCount[depth] = namespaceEnd;
startTagIncomplete = false;
}
}
protected void writeNamespaceDeclarations() throws IOException {
Set uniqueNamespaces = new HashSet<>();
for (int i = elNamespaceCount[depth - 1]; i < namespaceEnd; i++) {
String prefix = namespacePrefix[i];
String uri = namespaceUri[i];
// Some applications as seen in #2664 have duplicated namespaces.
// AOSP doesn't care, but the parser does. So we filter them out.
if (uniqueNamespaces.contains(prefix + uri)) {
continue;
}
if (doIndent && uri.length() > 40) {
writeIndent();
out.write(" ");
}
if (prefix != "") {
out.write(" xmlns:");
out.write(prefix);
out.write('=');
} else {
out.write(" xmlns=");
}
out.write(attributeUseApostrophe ? '\'' : '"');
// NOTE: escaping of namespace value the same way as attributes!!!!
writeAttributeValue(uri, out);
out.write(attributeUseApostrophe ? '\'' : '"');
uniqueNamespaces.add(prefix + uri);
}
}
@Override
public XmlSerializer endTag(String namespace, String name)
throws IOException {
seenBracket = seenBracketBracket = false;
if (namespace != null) {
if (!namesInterned) {
namespace = namespace.intern();
} else if (checkNamesInterned) {
checkInterning(namespace);
}
}
if (namespace != elNamespace[depth]) {
throw new IllegalArgumentException("expected namespace " + printable(elNamespace[depth]) + " and not "
+ printable(namespace) + getLocation());
}
if (name == null) {
throw new IllegalArgumentException("end tag name can not be null" + getLocation());
}
if (checkNamesInterned && namesInterned) {
checkInterning(name);
}
String startTagName = elName[depth];
if ((!namesInterned && !name.equals(startTagName)) || (namesInterned && name != startTagName)) {
throw new IllegalArgumentException("expected element name "
+ printable(elName[depth]) + " and not " + printable(name) + getLocation());
}
if (startTagIncomplete) {
writeNamespaceDeclarations();
out.write(" />"); // space is added to make it easier to work in XHTML!!!
} else {
if (doIndent && seenTag) {
writeIndent();
}
out.write(" 0) {
out.write(startTagPrefix);
out.write(':');
}
out.write(name);
out.write('>');
}
--depth;
namespaceEnd = elNamespaceCount[depth];
startTagIncomplete = false;
seenTag = true;
return this;
}
@Override
public XmlSerializer text(String text) throws IOException {
if (startTagIncomplete || setPrefixCalled)
closeStartTag();
if (doIndent && seenTag)
seenTag = false;
writeElementContent(text, out);
return this;
}
@Override
public XmlSerializer text(char[] buf, int start, int len)
throws IOException {
if (startTagIncomplete || setPrefixCalled)
closeStartTag();
if (doIndent && seenTag)
seenTag = false;
writeElementContent(buf, start, len, out);
return this;
}
@Override
public void cdsect(String text) throws IOException {
if (startTagIncomplete || setPrefixCalled || seenBracket)
closeStartTag();
if (doIndent && seenTag)
seenTag = false;
out.write("");
}
@Override
public void entityRef(String text) throws IOException {
if (startTagIncomplete || setPrefixCalled || seenBracket)
closeStartTag();
if (doIndent && seenTag)
seenTag = false;
out.write('&');
out.write(text); // escape?
out.write(';');
}
@Override
public void processingInstruction(String text) throws IOException {
if (startTagIncomplete || setPrefixCalled || seenBracket)
closeStartTag();
if (doIndent && seenTag)
seenTag = false;
out.write("");
}
@Override
public void comment(String text) throws IOException {
if (startTagIncomplete || setPrefixCalled || seenBracket)
closeStartTag();
if (doIndent && seenTag)
seenTag = false;
out.write("");
}
@Override
public void docdecl(String text) throws IOException {
if (startTagIncomplete || setPrefixCalled || seenBracket)
closeStartTag();
if (doIndent && seenTag)
seenTag = false;
out.write("");
}
@Override
public void ignorableWhitespace(String text) throws IOException {
if (startTagIncomplete || setPrefixCalled || seenBracket)
closeStartTag();
if (doIndent && seenTag)
seenTag = false;
if (text.length() == 0) {
throw new IllegalArgumentException("empty string is not allowed for ignorable whitespace" + getLocation());
}
out.write(text); // no escape?
}
@Override
public void flush() throws IOException {
if (!finished && startTagIncomplete)
closeStartTag();
out.flush();
}
// --- utility methods
protected void writeAttributeValue(String value, Writer out)
throws IOException {
// .[apostrophe and <, & escaped],
final char quot = attributeUseApostrophe ? '\'' : '"';
final String quotEntity = attributeUseApostrophe ? "'" : """;
int pos = 0;
for (int i = 0; i < value.length(); i++) {
char ch = value.charAt(i);
if (ch == '&') {
if (i > pos)
out.write(value.substring(pos, i));
out.write("&");
pos = i + 1;
}
if (ch == '<') {
if (i > pos)
out.write(value.substring(pos, i));
out.write("<");
pos = i + 1;
} else if (ch == quot) {
if (i > pos)
out.write(value.substring(pos, i));
out.write(quotEntity);
pos = i + 1;
} else if (ch < 32) {
// in XML 1.0 only legal character are #x9 | #xA | #xD
// and they must be escaped otherwise in attribute value they
// are normalized to spaces
if (ch == 13 || ch == 10 || ch == 9) {
if (i > pos)
out.write(value.substring(pos, i));
out.write("&#");
out.write(Integer.toString(ch));
out.write(';');
pos = i + 1;
} else {
if (TRACE_ESCAPING)
System.err.println(getClass().getName() + " DEBUG ATTR value.len=" + value.length()
+ " " + printable(value));
throw new IllegalStateException(
"character " + printable(ch) + " (" + Integer.toString(ch) + ") is not allowed in output"
+ getLocation() + " (attr value="
+ printable(value) + ")");
}
}
}
if (pos > 0) {
out.write(value.substring(pos));
} else {
out.write(value); // this is shortcut to the most common case
}
}
protected void writeElementContent(String text, Writer out)
throws IOException {
// For some reason, some non-empty, empty characters are surviving this far and getting filtered out
// So we are left with null, which causes an NPE
if (text == null) {
return;
}
// escape '<', '&', ']]>', <32 if necessary
int pos = 0;
for (int i = 0; i < text.length(); i++) {
// TODO: check if doing char[] text.getChars() would be faster than
// getCharAt(i) ...
char ch = text.charAt(i);
if (ch == ']') {
if (seenBracket) {
seenBracketBracket = true;
} else {
seenBracket = true;
}
} else {
if (ch == '&') {
if (!(i < text.length() - 3 && text.charAt(i+1) == 'l'
&& text.charAt(i+2) == 't' && text.charAt(i+3) == ';')) {
if (i > pos)
out.write(text.substring(pos, i));
out.write("&");
pos = i + 1;
}
} else if (ch == '<') {
if (i > pos)
out.write(text.substring(pos, i));
out.write("<");
pos = i + 1;
} else if (seenBracketBracket && ch == '>') {
if (i > pos)
out.write(text.substring(pos, i));
out.write(">");
pos = i + 1;
} else if (ch < 32) {
// in XML 1.0 only legal character are #x9 | #xA | #xD
if (ch == 9 || ch == 10 || ch == 13) {
// pass through
} else {
if (TRACE_ESCAPING)
System.err.println(getClass().getName() + " DEBUG TEXT value.len=" + text.length()
+ " " + printable(text));
throw new IllegalStateException("character " + Integer.toString(ch)
+ " is not allowed in output" + getLocation()
+ " (text value=" + printable(text) + ")");
}
}
if (seenBracket) {
seenBracketBracket = seenBracket = false;
}
}
}
if (pos > 0) {
out.write(text.substring(pos));
} else {
out.write(text); // this is shortcut to the most common case
}
}
protected void writeElementContent(char[] buf, int off, int len, Writer out)
throws IOException {
// escape '<', '&', ']]>'
final int end = off + len;
int pos = off;
for (int i = off; i < end; i++) {
final char ch = buf[i];
if (ch == ']') {
if (seenBracket) {
seenBracketBracket = true;
} else {
seenBracket = true;
}
} else {
if (ch == '&') {
if (i > pos) {
out.write(buf, pos, i - pos);
}
out.write("&");
pos = i + 1;
} else if (ch == '<') {
if (i > pos) {
out.write(buf, pos, i - pos);
}
out.write("<");
pos = i + 1;
} else if (seenBracketBracket && ch == '>') {
if (i > pos) {
out.write(buf, pos, i - pos);
}
out.write(">");
pos = i + 1;
} else if (ch < 32) {
// in XML 1.0 only legal character are #x9 | #xA | #xD
if (ch == 9 || ch == 10 || ch == 13) {
// pass through
} else {
if (TRACE_ESCAPING)
System.err.println(getClass().getName() + " DEBUG TEXT value.len=" + len + " "
+ printable(new String(buf, off, len)));
throw new IllegalStateException("character "
+ printable(ch) + " (" + Integer.toString(ch)
+ ") is not allowed in output" + getLocation());
}
}
if (seenBracket) {
seenBracketBracket = seenBracket = false;
}
}
}
if (end > pos) {
out.write(buf, pos, end - pos);
}
}
protected static String printable(String s) {
if (s == null) {
return "null";
}
StringBuffer retval = new StringBuffer(s.length() + 16);
retval.append("'");
for (int i = 0; i < s.length(); i++) {
addPrintable(retval, s.charAt(i));
}
retval.append("'");
return retval.toString();
}
protected static String printable(char ch) {
StringBuffer retval = new StringBuffer();
addPrintable(retval, ch);
return retval.toString();
}
private static void addPrintable(StringBuffer retval, char ch) {
switch (ch) {
case '\b':
retval.append("\\b");
break;
case '\t':
retval.append("\\t");
break;
case '\n':
retval.append("\\n");
break;
case '\f':
retval.append("\\f");
break;
case '\r':
retval.append("\\r");
break;
case '\"':
retval.append("\\\"");
break;
case '\'':
retval.append("\\'");
break;
case '\\':
retval.append("\\\\");
break;
default:
if (ch < 0x20 || ch > 0x7e) {
final String ss = "0000" + Integer.toString(ch, 16);
retval.append("\\u").append(ss.substring(ss.length() - 4));
} else {
retval.append(ch);
}
}
}
}