com.sun.faces.application.ViewHandlerResponseWrapper Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jakarta.faces-api Show documentation
Jakarta Faces defines an MVC framework for building user interfaces for web applications, including UI components, state management, event handing, input validation, page navigation, and support for internationalization and accessibility.
There is a newer version: 4.1.2
Show newest version
/*
 * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

// ViewHandlerResponseWrapper.java

package com.sun.faces.application;

import java.io.CharArrayWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;

import jakarta.servlet.ServletOutputStream;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpServletResponseWrapper;

/**
 * 
 * This class is used by {@link jakarta.faces.application.ViewHandler#createView} to obtain the text that exists after
 * the <f:view> tag.
 * 
 */
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 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 = 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