/**
* Get the state.
*
* <p>In JSF 2.2 it is required by the specification that the view state hidden input in each
* h:form has a unique id. So we have to call this method multiple times as each h:form needs to
* generate the element id for itself.
*
* @param stateManager the state manager.
* @param origWriter the original response writer.
* @return the state.
* @throws IOException when an I/O error occurs.
*/
private StringBuilder getState(StateManager stateManager, ResponseWriter origWriter)
throws IOException {
FastStringWriter stateWriter =
new FastStringWriter((stateManager.isSavingStateInClient(context)) ? bufSize : 128);
context.setResponseWriter(origWriter.cloneWithWriter(stateWriter));
if (state == null) {
state = stateManager.saveView(context);
}
stateManager.writeState(context, state);
context.setResponseWriter(origWriter);
StringBuilder stateBuilder = stateWriter.getBuffer();
return stateBuilder;
}
private void flushAttributes() throws IOException {
// a little complex, but the end result is, potentially, two
// fewer temp objects created per call.
StringBuilder b = attributesBuffer.getBuffer();
int totalLength = b.length();
if (totalLength != 0) {
int curIdx = 0;
while (curIdx < totalLength) {
if ((totalLength - curIdx) > buffer.length) {
int end = curIdx + buffer.length;
b.getChars(curIdx, end, buffer, 0);
writer.write(buffer);
curIdx += buffer.length;
} else {
int len = totalLength - curIdx;
b.getChars(curIdx, curIdx + len, buffer, 0);
writer.write(buffer, 0, len);
curIdx += len;
}
}
attributesBuffer.reset();
}
}
/**
* Write directly from our FastStringWriter to the provided writer.
*
* @throws IOException if an error occurs
*/
public void flushToWriter() throws IOException {
// Save the state to a new instance of StringWriter to
// avoid multiple serialization steps if the view contains
// multiple forms.
StateManager stateManager = Util.getStateManager(context);
ResponseWriter origWriter = context.getResponseWriter();
StringBuilder stateBuilder = getState(stateManager, origWriter);
StringBuilder builder = fWriter.getBuffer();
// begin writing...
int totalLen = builder.length();
int stateLen = stateBuilder.length();
int pos = 0;
int tildeIdx = getNextDelimiterIndex(builder, pos);
while (pos < totalLen) {
if (tildeIdx != -1) {
if (tildeIdx > pos && (tildeIdx - pos) > bufSize) {
// there's enough content before the first ~
// to fill the entire buffer
builder.getChars(pos, (pos + bufSize), buf, 0);
orig.write(buf);
pos += bufSize;
} else {
// write all content up to the first '~'
builder.getChars(pos, tildeIdx, buf, 0);
int len = (tildeIdx - pos);
orig.write(buf, 0, len);
// now check to see if the state saving string is
// at the begining of pos, if so, write our
// state out.
if (builder.indexOf(RIConstants.SAVESTATE_FIELD_MARKER, pos) == tildeIdx) {
// buf is effectively zero'd out at this point
int statePos = 0;
while (statePos < stateLen) {
if ((stateLen - statePos) > bufSize) {
// enough state to fill the buffer
stateBuilder.getChars(statePos, (statePos + bufSize), buf, 0);
orig.write(buf);
statePos += bufSize;
} else {
int slen = (stateLen - statePos);
stateBuilder.getChars(statePos, stateLen, buf, 0);
orig.write(buf, 0, slen);
statePos += slen;
}
}
// push us past the last '~' at the end of the marker
pos += (len + STATE_MARKER_LEN);
tildeIdx = getNextDelimiterIndex(builder, pos);
stateBuilder = getState(stateManager, origWriter);
stateLen = stateBuilder.length();
} else {
pos = tildeIdx;
tildeIdx = getNextDelimiterIndex(builder, tildeIdx + 1);
}
}
} else {
// we've written all of the state field markers.
// finish writing content
if (totalLen - pos > bufSize) {
// there's enough content to fill the buffer
builder.getChars(pos, (pos + bufSize), buf, 0);
orig.write(buf);
pos += bufSize;
} else {
// we're near the end of the response
builder.getChars(pos, totalLen, buf, 0);
int len = (totalLen - pos);
orig.write(buf, 0, len);
pos += (len + 1);
}
}
}
// all state has been written. Have 'out' point to the
// response so that all subsequent writes will make it to the
// browser.
out = orig;
}