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// ViewHandlerResponseWrapper.java
package com.sun.faces.application;
import javax.servlet.ServletOutputStream;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
import java.io.CharArrayWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;
/**
* <p>
* This class is used by {@link javax.faces.application.ViewHandler#createView} to obtain the text
* that exists after the <f:view> tag.
* </p>
*/
public class ViewHandlerResponseWrapper extends HttpServletResponseWrapper {
private ByteArrayWebOutputStream basos;
private WebPrintWriter pw;
private CharArrayWriter caw;
private int status = HttpServletResponse.SC_OK;
public ViewHandlerResponseWrapper(HttpServletResponse wrapped) {
super(wrapped);
}
@Override
public void sendError(int sc, String msg) throws IOException {
super.sendError(sc, msg);
status = sc;
}
@Override
public void sendError(int sc) throws IOException {
super.sendError(sc);
status = sc;
}
@Override
public void setStatus(int sc) {
super.setStatus(sc);
status = sc;
}
@Override
public void setStatus(int sc, String sm) {
super.setStatus(sc, sm);
status = sc;
}
@Override
public int getStatus() {
return status;
}
public boolean isBytes() {
return (null != basos);
}
public boolean isChars() {
return (null != caw);
}
public byte[] getBytes() {
byte[] result = null;
if (null != basos) {
result = basos.toByteArray();
}
return result;
}
public char[] getChars() {
char[] result = null;
if (null != caw) {
result = caw.toCharArray();
}
return result;
}
@Override
public String toString() {
String result = "null";
if (null != caw) {
result = caw.toString();
} else if (null != basos) {
result = basos.toString();
}
return result;
}
public void flushContentToWrappedResponse() throws IOException {
ServletResponse wrapped = this.getResponse();
if (null != caw) {
pw.flush();
caw.writeTo(wrapped.getWriter());
caw.reset();
} else if (null != basos) {
try {
basos.writeTo(wrapped.getWriter(), wrapped.getCharacterEncoding());
} catch (IllegalStateException ise) {
basos.writeTo(wrapped.getOutputStream());
}
basos.resetByteArray();
}
}
public void flushToWriter(Writer writer, String encoding) throws IOException {
if (null != caw) {
pw.flush();
caw.writeTo(writer);
caw.reset();
} else if (null != basos) {
basos.writeTo(writer, encoding);
basos.resetByteArray();
}
writer.flush();
}
public void resetBuffers() throws IOException {
if (null != caw) {
caw.reset();
} else if (null != basos) {
basos.resetByteArray();
}
}
@Override
public ServletOutputStream getOutputStream() throws IOException {
if (pw != null && (!pw.isComitted() && !isCommitted())) {
throw new IllegalStateException();
} else if (pw != null && (pw.isComitted() || isCommitted())) {
return ByteArrayWebOutputStream.NOOP_STREAM;
}
if (null == basos) {
basos = new ByteArrayWebOutputStream();
}
return basos;
}
@Override
public PrintWriter getWriter() throws IOException {
if (basos != null && (!basos.isCommitted() && !isCommitted())) {
throw new IllegalStateException();
} else if (basos != null && (basos.isCommitted() || isCommitted())) {
return new WebPrintWriter(WebPrintWriter.NOOP_WRITER);
}
if (null == pw) {
caw = new CharArrayWriter(1024);
pw = new WebPrintWriter(caw);
}
return pw;
}
} // end of class ViewHandlerResponseWrapper