in src/org/apache/xerces/impl/XMLEntityManager.java [985:1236]
public String setupCurrentEntity(String name, XMLInputSource xmlInputSource,
boolean literal, boolean isExternal)
throws IOException, XNIException {
// get information
final String publicId = xmlInputSource.getPublicId();
String literalSystemId = xmlInputSource.getSystemId();
String baseSystemId = xmlInputSource.getBaseSystemId();
String encoding = xmlInputSource.getEncoding();
final boolean encodingExternallySpecified = (encoding != null);
Boolean isBigEndian = null;
fTempByteBuffer = null;
// create reader
InputStream stream = null;
Reader reader = xmlInputSource.getCharacterStream();
// First chance checking strict URI
String expandedSystemId = expandSystemId(literalSystemId, baseSystemId, fStrictURI);
if (baseSystemId == null) {
baseSystemId = expandedSystemId;
}
if (reader == null) {
stream = xmlInputSource.getByteStream();
if (stream == null) {
URL location = new URL(expandedSystemId);
URLConnection connect = location.openConnection();
if (!(connect instanceof HttpURLConnection)) {
stream = connect.getInputStream();
}
else {
boolean followRedirects = true;
// setup URLConnection if we have an HTTPInputSource
if (xmlInputSource instanceof HTTPInputSource) {
final HttpURLConnection urlConnection = (HttpURLConnection) connect;
final HTTPInputSource httpInputSource = (HTTPInputSource) xmlInputSource;
// set request properties
Iterator propIter = httpInputSource.getHTTPRequestProperties();
while (propIter.hasNext()) {
Map.Entry entry = (Map.Entry) propIter.next();
urlConnection.setRequestProperty((String) entry.getKey(), (String) entry.getValue());
}
// set preference for redirection
followRedirects = httpInputSource.getFollowHTTPRedirects();
if (!followRedirects) {
urlConnection.setInstanceFollowRedirects(followRedirects);
}
}
stream = connect.getInputStream();
// REVISIT: If the URLConnection has external encoding
// information, we should be reading it here. It's located
// in the charset parameter of Content-Type. -- mrglavas
if (followRedirects) {
String redirect = connect.getURL().toString();
// E43: Check if the URL was redirected, and then
// update literal and expanded system IDs if needed.
if (!redirect.equals(expandedSystemId)) {
literalSystemId = redirect;
expandedSystemId = redirect;
}
}
}
}
// wrap this stream in RewindableInputStream
RewindableInputStream rewindableStream = new RewindableInputStream(stream);
stream = rewindableStream;
// perform auto-detect of encoding if necessary
if (encoding == null) {
// read first four bytes and determine encoding
final byte[] b4 = new byte[4];
int count = 0;
for (; count<4; count++ ) {
b4[count] = (byte)rewindableStream.readAndBuffer();
}
if (count == 4) {
final EncodingInfo info = getEncodingInfo(b4, count);
encoding = info.autoDetectedEncoding;
final String readerEncoding = info.readerEncoding;
isBigEndian = info.isBigEndian;
stream.reset();
if (info.hasBOM) {
// Special case UTF-8 files with BOM created by Microsoft
// tools. It's more efficient to consume the BOM than make
// the reader perform extra checks. -Ac
if (readerEncoding == "UTF-8") {
// UTF-8 BOM: 0xEF 0xBB 0xBF
stream.skip(3);
}
// It's also more efficient to consume the UTF-16 BOM.
else if (readerEncoding == "UTF-16") {
// UTF-16 BE BOM: 0xFE 0xFF
// UTF-16 LE BOM: 0xFF 0xFE
stream.skip(2);
}
}
reader = createReader(stream, readerEncoding, isBigEndian);
}
else {
reader = createReader(stream, encoding, isBigEndian);
}
}
// use specified encoding
else {
encoding = encoding.toUpperCase(Locale.ENGLISH);
// If encoding is UTF-8, consume BOM if one is present.
if (encoding.equals("UTF-8")) {
final int[] b3 = new int[3];
int count = 0;
for (; count < 3; ++count) {
b3[count] = rewindableStream.readAndBuffer();
if (b3[count] == -1)
break;
}
if (count == 3) {
if (b3[0] != 0xEF || b3[1] != 0xBB || b3[2] != 0xBF) {
// First three bytes are not BOM, so reset.
stream.reset();
}
}
else {
stream.reset();
}
reader = createReader(stream, "UTF-8", isBigEndian);
}
// If encoding is UTF-16, we still need to read the first
// four bytes, in order to discover the byte order.
else if (encoding.equals("UTF-16")) {
final int[] b4 = new int[4];
int count = 0;
for (; count < 4; ++count) {
b4[count] = rewindableStream.readAndBuffer();
if (b4[count] == -1)
break;
}
stream.reset();
if (count >= 2) {
final int b0 = b4[0];
final int b1 = b4[1];
if (b0 == 0xFE && b1 == 0xFF) {
// UTF-16, big-endian
isBigEndian = Boolean.TRUE;
stream.skip(2);
}
else if (b0 == 0xFF && b1 == 0xFE) {
// UTF-16, little-endian
isBigEndian = Boolean.FALSE;
stream.skip(2);
}
else if (count == 4) {
final int b2 = b4[2];
final int b3 = b4[3];
if (b0 == 0x00 && b1 == 0x3C && b2 == 0x00 && b3 == 0x3F) {
// UTF-16, big-endian, no BOM
isBigEndian = Boolean.TRUE;
}
if (b0 == 0x3C && b1 == 0x00 && b2 == 0x3F && b3 == 0x00) {
// UTF-16, little-endian, no BOM
isBigEndian = Boolean.FALSE;
}
}
}
reader = createReader(stream, "UTF-16", isBigEndian);
}
// If encoding is UCS-4, we still need to read the first four bytes
// in order to discover the byte order.
else if (encoding.equals("ISO-10646-UCS-4")) {
final int[] b4 = new int[4];
int count = 0;
for (; count < 4; ++count) {
b4[count] = rewindableStream.readAndBuffer();
if (b4[count] == -1)
break;
}
stream.reset();
// Ignore unusual octet order for now.
if (count == 4) {
// UCS-4, big endian (1234)
if (b4[0] == 0x00 && b4[1] == 0x00 && b4[2] == 0x00 && b4[3] == 0x3C) {
isBigEndian = Boolean.TRUE;
}
// UCS-4, little endian (1234)
else if (b4[0] == 0x3C && b4[1] == 0x00 && b4[2] == 0x00 && b4[3] == 0x00) {
isBigEndian = Boolean.FALSE;
}
}
reader = createReader(stream, encoding, isBigEndian);
}
// If encoding is UCS-2, we still need to read the first four bytes
// in order to discover the byte order.
else if (encoding.equals("ISO-10646-UCS-2")) {
final int[] b4 = new int[4];
int count = 0;
for (; count < 4; ++count) {
b4[count] = rewindableStream.readAndBuffer();
if (b4[count] == -1)
break;
}
stream.reset();
if (count == 4) {
// UCS-2, big endian
if (b4[0] == 0x00 && b4[1] == 0x3C && b4[2] == 0x00 && b4[3] == 0x3F) {
isBigEndian = Boolean.TRUE;
}
// UCS-2, little endian
else if (b4[0] == 0x3C && b4[1] == 0x00 && b4[2] == 0x3F && b4[3] == 0x00) {
isBigEndian = Boolean.FALSE;
}
}
reader = createReader(stream, encoding, isBigEndian);
}
else {
reader = createReader(stream, encoding, isBigEndian);
}
}
// read one character at a time so we don't jump too far
// ahead, converting characters from the byte stream in
// the wrong encoding
if (DEBUG_ENCODINGS) {
System.out.println("$$$ no longer wrapping reader in OneCharReader");
}
//reader = new OneCharReader(reader);
}
// We've seen a new Reader.
// Push it on the stack so we can close it later.
fReaderStack.push(reader);
// push entity on stack
if (fCurrentEntity != null) {
fEntityStack.push(fCurrentEntity);
}
// create entity
fCurrentEntity = new ScannedEntity(name,
new XMLResourceIdentifierImpl(publicId, literalSystemId, baseSystemId, expandedSystemId),
stream, reader, fTempByteBuffer, encoding, literal, false, isExternal);
fCurrentEntity.setEncodingExternallySpecified(encodingExternallySpecified);
fEntityScanner.setCurrentEntity(fCurrentEntity);
fResourceIdentifier.setValues(publicId, literalSystemId, baseSystemId, expandedSystemId);
return encoding;
} //setupCurrentEntity(String, XMLInputSource, boolean, boolean): String