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Woodstox is a high-performance XML processor that implements Stax (JSR-173),
SAX2 and Stax2 APIs
/* Woodstox XML processor
*
* Copyright (c) 2004- Tatu Saloranta, [email protected]
*
* Licensed under the License specified in file LICENSE, included with
* the source code.
* You may not use this file except in compliance with the License.
*
* 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 com.ctc.wstx.sw;
import java.io.*;
import javax.xml.stream.XMLStreamException;
import com.ctc.wstx.api.WriterConfig;
import com.ctc.wstx.io.CharsetNames;
/**
* Concrete implementation of {@link EncodingXmlWriter} used when output
* is to be encoded using 7-bit ascii (US-ASCII) encoding.
*/
public final class AsciiXmlWriter
extends EncodingXmlWriter
{
public AsciiXmlWriter(OutputStream out, WriterConfig cfg, boolean autoclose)
throws IOException
{
super(out, cfg, CharsetNames.CS_US_ASCII, autoclose);
}
@Override
public void writeRaw(char[] cbuf, int offset, int len)
throws IOException
{
if (mSurrogate != 0) {
throwUnpairedSurrogate();
}
int ptr = mOutputPtr;
while (len > 0) {
int max = mOutputBuffer.length - ptr;
if (max < 1) { // output buffer full?
mOutputPtr = ptr;
flushBuffer();
ptr = 0;
max = mOutputBuffer.length;
}
// How much can we output?
if (max > len) {
max = len;
}
if (mCheckContent) {
for (int inEnd = offset + max; offset < inEnd; ++offset) {
int c = cbuf[offset];
if (c < 32) {
if (c == '\n') {
// !!! TBI: line nr
} else if (c == '\r') {
// !!! TBI: line nr (and skipping \n that may follow)
} else if (c != '\t') {
mOutputPtr = ptr;
c = handleInvalidChar(c);
}
} else if (c > 0x7E) {
mOutputPtr = ptr;
if (c > 0x7F) { // 0x7F invalid in xml11
handleInvalidAsciiChar(c);
} else if (mXml11) {
c = handleInvalidChar(c);
}
}
mOutputBuffer[ptr++] = (byte) c;
}
} else {
for (int inEnd = offset + max; offset < inEnd; ++offset) {
mOutputBuffer[ptr++] = (byte) cbuf[offset];
}
}
len -= max;
}
mOutputPtr = ptr;
}
@Override
public void writeRaw(String str, int offset, int len)
throws IOException
{
if (mSurrogate != 0) {
throwUnpairedSurrogate();
}
int ptr = mOutputPtr;
while (len > 0) {
int max = mOutputBuffer.length - ptr;
if (max < 1) { // output buffer full?
mOutputPtr = ptr;
flushBuffer();
ptr = 0;
max = mOutputBuffer.length;
}
// How much can we output?
if (max > len) {
max = len;
}
if (mCheckContent) {
for (int inEnd = offset + max; offset < inEnd; ++offset) {
int c = str.charAt(offset);
if (c < 32) {
if (c == '\n') {
// !!! TBI: line nr
} else if (c == '\r') {
// !!! TBI: line nr (and skipping \n that may follow)
} else if (c != '\t') {
mOutputPtr = ptr;
c = handleInvalidChar(c);
}
} else if (c > 0x7E) {
mOutputPtr = ptr;
if (c > 0x7F) { // 0x7F invalid in xml11
handleInvalidAsciiChar(c);
} else if (mXml11) {
c = handleInvalidChar(c);
}
}
mOutputBuffer[ptr++] = (byte) c;
}
} else {
for (int inEnd = offset + max; offset < inEnd; ++offset) {
mOutputBuffer[ptr++] = (byte) str.charAt(offset);
}
}
len -= max;
}
mOutputPtr = ptr;
}
@Override
protected void writeAttrValue(String data)
throws IOException
{
int offset = 0;
int len = data.length();
int ptr = mOutputPtr;
main_loop:
while (len > 0) {
int max = mOutputBuffer.length - ptr;
if (max < 1) { // output buffer full?
mOutputPtr = ptr;
flushBuffer();
ptr = 0;
max = mOutputBuffer.length;
}
// Do we start with a surrogate?
if (mSurrogate != 0) {
int sec = data.charAt(offset++);
sec = calcSurrogate(sec);
mOutputPtr = ptr;
ptr = writeAsEntity(sec);
--len;
continue main_loop;
}
// How much can we output?
if (max > len) {
max = len;
}
inner_loop:
for (int inEnd = offset + max; offset < inEnd; ) {
int c = data.charAt(offset++);
if (c < 32) {
/* Need to quote all white space except for regular
* space chars, to preserve them (round-tripping)
*/
if (c == '\r') {
if (!mEscapeCR) {
mOutputBuffer[ptr++] = (byte) c;
continue;
}
} else if (c != '\n' && c != '\t') {
if (mCheckContent) {
if (!mXml11 || c == 0) {
c = handleInvalidChar(c);
mOutputBuffer[ptr++] = (byte) c;
continue;
}
}
}
// fall-through to char entity output
} else if (c < 0x7F) {
if (c != '<' && c != '&' && c != '"') {
mOutputBuffer[ptr++] = (byte) c;
continue;
}
// otherwise fall back on quoting
} else {
// Surrogate?
if (c >= SURR1_FIRST && c <= SURR2_LAST) {
mSurrogate = c;
// Last char needs special handling:
if (offset == inEnd) {
break inner_loop;
}
c = calcSurrogate(data.charAt(offset++));
// Let's fall down to entity output
}
}
/* Has to be escaped as char entity; as such, also need
* to re-calc max. continguous data we can output
*/
mOutputPtr = ptr;
ptr = writeAsEntity(c);
len = data.length() - offset;
continue main_loop;
}
len -= max;
}
mOutputPtr = ptr;
}
@Override
protected void writeAttrValue(char[] data, int offset, int len)
throws IOException
{
int ptr = mOutputPtr;
main_loop:
while (len > 0) {
int max = mOutputBuffer.length - ptr;
if (max < 1) { // output buffer full?
mOutputPtr = ptr;
flushBuffer();
ptr = 0;
max = mOutputBuffer.length;
}
// Do we start with a surrogate?
if (mSurrogate != 0) {
int sec = data[offset++];
sec = calcSurrogate(sec);
mOutputPtr = ptr;
ptr = writeAsEntity(sec);
--len;
continue main_loop;
}
// How much can we output?
if (max > len) {
max = len;
}
inner_loop:
for (int inEnd = offset + max; offset < inEnd; ) {
int c = data[offset++];
if (c < 32) {
/* Need to quote all white space except for regular
* space chars, to preserve them (round-tripping)
*/
if (c == '\r') {
if (!mEscapeCR) {
mOutputBuffer[ptr++] = (byte) c;
continue;
}
} else if (c != '\n' && c != '\t') {
if (mCheckContent) {
if (!mXml11 || c == 0) {
c = handleInvalidChar(c);
mOutputBuffer[ptr++] = (byte) c;
continue;
}
}
}
// fall-through to char entity output
} else if (c < 0x7F) {
if (c != '<' && c != '&' && c != '"') {
mOutputBuffer[ptr++] = (byte) c;
continue;
}
// otherwise fall back on quoting
} else {
// Surrogate?
if (c >= SURR1_FIRST && c <= SURR2_LAST) {
mSurrogate = c;
// Last char needs special handling:
if (offset == inEnd) {
break inner_loop;
}
c = calcSurrogate(data[offset++]);
// Let's fall down to entity output
}
}
/* Has to be escaped as char entity; as such, also need
* to re-calc max. contiguous data we can output
*/
mOutputPtr = ptr;
ptr = writeAsEntity(c);
max -= (inEnd - offset); // since we didn't loop completely
break inner_loop;
}
len -= max;
}
mOutputPtr = ptr;
}
@Override
protected int writeCDataContent(String data)
throws IOException
{
// Note: mSurrogate can not be non-zero at this point, no need to check
int offset = 0;
int len = data.length();
if (!mCheckContent) {
writeRaw(data, offset, len);
return -1;
}
int ptr = mOutputPtr;
main_loop:
while (len > 0) {
int max = mOutputBuffer.length - ptr;
if (max < 1) { // output buffer full?
mOutputPtr = ptr;
flushBuffer();
ptr = 0;
max = mOutputBuffer.length;
}
// How much can we output?
if (max > len) {
max = len;
}
for (int inEnd = offset + max; offset < inEnd; ) {
int c = data.charAt(offset++);
if (c < 32) {
if (c == '\n') {
// !!! TBI: line nr
} else if (c == '\r') {
// !!! TBI: line nr (and skipping \n that may follow)
} else if (c != '\t') {
mOutputPtr = ptr;
c = handleInvalidChar(c);
}
} else if (c > 0x7E) {
mOutputPtr = ptr;
if (c > 0x7F) { // 0x7F invalid in xml11
handleInvalidAsciiChar(c);
} else if (mXml11) {
c = handleInvalidChar(c);
}
} else if (c == '>') { // embedded "]]>"?
if (offset > 2 && data.charAt(offset-2) == ']'
&& data.charAt(offset-3) == ']') {
if (!mFixContent) {
return offset-3;
}
/* Relatively easy fix; just need to close this
* section, and open a new one...
*/
mOutputPtr = ptr;
writeCDataEnd();
writeCDataStart();
writeAscii(BYTE_GT);
ptr = mOutputPtr;
/* No guarantees there's as much free room in the
* output buffer, thus, need to restart loop:
*/
len = data.length() - offset;
continue main_loop;
}
}
mOutputBuffer[ptr++] = (byte) c;
}
len -= max;
}
mOutputPtr = ptr;
return -1;
}
@Override
protected int writeCDataContent(char[] cbuf, int start, int len)
throws IOException
{
// Note: mSurrogate can not be non-zero at this point, no need to check
if (!mCheckContent) {
writeRaw(cbuf, start, len);
return -1;
}
int ptr = mOutputPtr;
int offset = start;
while (len > 0) {
int max = mOutputBuffer.length - ptr;
if (max < 1) { // output buffer full?
mOutputPtr = ptr;
flushBuffer();
ptr = 0;
max = mOutputBuffer.length;
}
// How much can we output?
if (max > len) {
max = len;
}
inner_loop:
for (int inEnd = offset + max; offset < inEnd; ) {
int c = cbuf[offset++];
if (c < 32) {
if (c == '\n') {
// !!! TBI: line nr
} else if (c == '\r') {
// !!! TBI: line nr (and skipping \n that may follow)
} else if (c != '\t') {
mOutputPtr = ptr;
c = handleInvalidChar(c);
}
} else if (c > 0x7E) {
mOutputPtr = ptr;
if (c > 0x7F) { // 0x7F invalid in xml11
handleInvalidAsciiChar(c);
} else if (mXml11) {
c = handleInvalidChar(c);
}
} else if (c == '>') { // embedded "]]>"?
if (offset >= (start+3) && cbuf[offset-2] == ']'
&& cbuf[offset-3] == ']') {
if (!mFixContent) {
return offset-3;
}
/* Relatively easy fix; just need to close this
* section, and open a new one...
*/
mOutputPtr = ptr;
writeCDataEnd();
writeCDataStart();
writeAscii(BYTE_GT);
ptr = mOutputPtr;
/* No guarantees there's as much free room in the
* output buffer, thus, need to restart loop:
*/
max -= (inEnd - offset);
break inner_loop;
}
}
mOutputBuffer[ptr++] = (byte) c;
}
len -= max;
}
mOutputPtr = ptr;
return -1;
}
@Override
protected int writeCommentContent(String data)
throws IOException
{
// Note: mSurrogate can not be non-zero at this point, no need to check
int offset = 0;
int len = data.length();
if (!mCheckContent) {
writeRaw(data, offset, len);
return -1;
}
int ptr = mOutputPtr;
while (len > 0) {
int max = mOutputBuffer.length - ptr;
if (max < 1) { // output buffer full?
mOutputPtr = ptr;
flushBuffer();
ptr = 0;
max = mOutputBuffer.length;
}
// How much can we output?
if (max > len) {
max = len;
}
inner_loop:
for (int inEnd = offset + max; offset < inEnd; ) {
int c = data.charAt(offset++);
if (c < 32) {
if (c == '\n') {
// !!! TBI: line nr
} else if (c == '\r') {
// !!! TBI: line nr (and skipping \n that may follow)
} else if (c != '\t') {
mOutputPtr = ptr;
c = handleInvalidChar(c);
}
} else if (c > 0x7E) {
mOutputPtr = ptr;
if (c > 0x7F) { // 0x7F invalid in xml11
handleInvalidAsciiChar(c);
} else if (mXml11) {
c = handleInvalidChar(c);
}
} else if (c == '-') { // embedded "--"?
if (offset > 1 && data.charAt(offset-2) == '-') {
if (!mFixContent) {
return offset-2;
}
/* Quite easy to fix: just add an extra space
* in front. There will be room for that char;
* but may need to take that the following '-'
* also fits.
*/
mOutputBuffer[ptr++] = ' ';
if (ptr >= mOutputBuffer.length) { // whops. need to flush
mOutputPtr = ptr;
flushBuffer();
ptr = 0;
}
mOutputBuffer[ptr++] = BYTE_HYPHEN;
/* Also, since we did output an extra char, better
* restart the loop (since max calculation is now
* off)
*/
max -= (inEnd - offset);
break inner_loop;
}
}
mOutputBuffer[ptr++] = (byte) c;
}
len -= max;
}
mOutputPtr = ptr;
return -1;
}
@Override
protected int writePIData(String data)
throws IOException, XMLStreamException
{
// Note: mSurrogate can not be non-zero at this point, no need to check
int offset = 0;
int len = data.length();
if (!mCheckContent) {
writeRaw(data, offset, len);
return -1;
}
int ptr = mOutputPtr;
while (len > 0) {
int max = mOutputBuffer.length - ptr;
if (max < 1) { // output buffer full?
mOutputPtr = ptr;
flushBuffer();
ptr = 0;
max = mOutputBuffer.length;
}
// How much can we output?
if (max > len) {
max = len;
}
for (int inEnd = offset + max; offset < inEnd; ++offset) {
int c = data.charAt(offset);
if (c < 32) {
if (c == '\n') {
// !!! TBI: line nr
} else if (c == '\r') {
// !!! TBI: line nr (and skipping \n that may follow)
} else if (c != '\t') {
mOutputPtr = ptr;
c = handleInvalidChar(c);
}
} else if (c > 0x7E) {
mOutputPtr = ptr;
if (c > 0x7F) { // 0x7F invalid in xml11
handleInvalidAsciiChar(c);
} else if (mXml11) {
c = handleInvalidChar(c);
}
} else if (c == '>') { // enclosed end marker ("?>")?
if (offset > 0 && data.charAt(offset-1) == '?') {
return offset-2;
}
}
mOutputBuffer[ptr++] = (byte) c;
}
len -= max;
}
mOutputPtr = ptr;
return -1;
}
@Override
protected void writeTextContent(String data) throws IOException
{
int offset = 0;
int len = data.length();
main_loop:
while (len > 0) {
int max = mOutputBuffer.length - mOutputPtr;
if (max < 1) { // output buffer full?
flushBuffer();
max = mOutputBuffer.length;
}
// Do we start with a surrogate?
if (mSurrogate != 0) {
int sec = data.charAt(offset++);
sec = calcSurrogate(sec);
writeAsEntity(sec);
--len;
continue main_loop;
}
// How much can we output?
if (max > len) {
max = len;
}
inner_loop:
for (int inEnd = offset + max; offset < inEnd; ) {
int c = data.charAt(offset++);
if (c < 32) {
if (c == '\n' || c == '\t') { // TODO: line count
mOutputBuffer[mOutputPtr++] = (byte) c;
continue;
} else if (c == '\r') {
if (!mEscapeCR) {
mOutputBuffer[mOutputPtr++] = (byte) c;
continue;
}
} else if (!mXml11 || c == 0) { // ok in xml1.1, as entity
if (mCheckContent) {
c = handleInvalidChar(c);
mOutputBuffer[mOutputPtr++] = (byte) c;
continue;
}
// otherwise... well, I guess we can just escape it
}
// \r, or xml1.1 + other whitespace, need to escape
} else if (c < 0x7F) {
if (c != '<' && c != '&') {
if (c != '>' || (offset > 1 && data.charAt(offset-2) != ']')) {
mOutputBuffer[mOutputPtr++] = (byte) c;
continue;
}
}
// otherwise fall back on quoting
} else {
// Surrogate?
if (c >= SURR1_FIRST && c <= SURR2_LAST) {
mSurrogate = c;
// Last char needs special handling:
if (offset == inEnd) {
break inner_loop;
}
c = calcSurrogate(data.charAt(offset++));
// Let's fall down to entity output
}
}
/* Has to be escaped as char entity; as such, also need
* to re-calc max. continguous data we can output
*/
writeAsEntity(c);
len = data.length() - offset;
continue main_loop;
}
len -= max;
}
}
@Override
protected void writeTextContent(char[] cbuf, int offset, int len)
throws IOException
{
main_loop:
while (len > 0) {
int max = mOutputBuffer.length - mOutputPtr;
if (max < 1) { // output buffer full?
flushBuffer();
max = mOutputBuffer.length;
}
// Do we start with a surrogate?
if (mSurrogate != 0) {
int sec = cbuf[offset++];
sec = calcSurrogate(sec);
writeAsEntity(sec);
--len;
continue main_loop;
}
// How much can we output?
if (max > len) {
max = len;
}
inner_loop:
for (int inEnd = offset + max; offset < inEnd; ) {
int c = cbuf[offset++];
if (c < 32) {
if (c == '\n' || c == '\t') { // TODO: line count
mOutputBuffer[mOutputPtr++] = (byte) c;
continue;
} else if (c == '\r') {
if (!mEscapeCR) {
mOutputBuffer[mOutputPtr++] = (byte) c;
continue;
}
} else if (!mXml11 || c == 0) { // ok in xml1.1, as entity
if (mCheckContent) {
c = handleInvalidChar(c);
mOutputBuffer[mOutputPtr++] = (byte) c;
continue;
}
// otherwise... well, I guess we can just try to escape it
}
// \r, or xml1.1 + other whitespace, need to escape
} else if (c < 0x7F) {
if (c !='<' && c != '&') {
/* Since we can be conservative, it doesn't matter
* if second check is not exact
*/
if (c != '>' || (offset > 1 && cbuf[offset-2] != ']')) {
mOutputBuffer[mOutputPtr++] = (byte) c;
continue;
}
}
// otherwise fall back on quoting
} else {
// Surrogate?
if (c >= SURR1_FIRST && c <= SURR2_LAST) {
mSurrogate = c;
// Last char needs special handling:
if (offset == inEnd) {
break inner_loop;
}
c = calcSurrogate(cbuf[offset++]);
// Let's fall down to entity output
}
}
/* Has to be escaped as char entity; as such, also need
* to re-calc max. continguous data we can output
*/
writeAsEntity(c);
max -= (inEnd - offset);
break inner_loop;
}
len -= max;
}
}
/*
////////////////////////////////////////////////////
// Internal methods
////////////////////////////////////////////////////
*/
protected void handleInvalidAsciiChar(int c)
throws IOException
{
// First, let's flush any output we may have, to make debugging easier
flush();
/* 17-May-2006, TSa: Would really be useful if we could throw
* XMLStreamExceptions; esp. to indicate actual output location.
* However, this causes problem with methods that call us and
* can only throw IOExceptions (when invoked via Writer proxy).
* Need to figure out how to resolve this.
*/
throw new IOException("Invalid XML character (0x"+Integer.toHexString(c)+"); can only be output using character entity when using US-ASCII encoding");
}
}