001: /*
002: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003: *
004: * This file is part of Resin(R) Open Source
005: *
006: * Each copy or derived work must preserve the copyright notice and this
007: * notice unmodified.
008: *
009: * Resin Open Source is free software; you can redistribute it and/or modify
010: * it under the terms of the GNU General Public License as published by
011: * the Free Software Foundation; either version 2 of the License, or
012: * (at your option) any later version.
013: *
014: * Resin Open Source is distributed in the hope that it will be useful,
015: * but WITHOUT ANY WARRANTY; without even the implied warranty of
016: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017: * of NON-INFRINGEMENT. See the GNU General Public License for more
018: * details.
019: *
020: * You should have received a copy of the GNU General Public License
021: * along with Resin Open Source; if not, write to the
022: * Free SoftwareFoundation, Inc.
023: * 59 Temple Place, Suite 330
024: * Boston, MA 02111-1307 USA
025: *
026: * @author Scott Ferguson
027: */
028:
029: package com.caucho.jsp;
030:
031: import com.caucho.log.Log;
032: import com.caucho.vfs.FlushBuffer;
033:
034: import javax.servlet.jsp.JspWriter;
035: import javax.servlet.jsp.tagext.BodyContent;
036: import java.io.IOException;
037: import java.io.Reader;
038: import java.io.Writer;
039: import java.util.logging.Logger;
040:
041: /**
042: * A buffered JSP writer encapsulating a Writer.
043: */
044: abstract class AbstractJspWriter extends BodyContent implements
045: FlushBuffer {
046: protected static final Logger log = Log
047: .open(AbstractJspWriter.class);
048: private JspWriter _parent;
049:
050: // the underlying writer
051: private Writer _writer;
052:
053: /**
054: * Creates a new QJspWriter
055: */
056: AbstractJspWriter() {
057: super (null);
058:
059: this .autoFlush = true;
060: }
061:
062: /**
063: * Creates a new QJspWriter
064: */
065: AbstractJspWriter(int bufferSize, boolean isAutoFlush) {
066: super (null);
067:
068: this .bufferSize = bufferSize;
069: this .autoFlush = isAutoFlush;
070: }
071:
072: /**
073: * Sets the parent.
074: */
075: public void setParent(JspWriter parent) {
076: _parent = parent;
077: }
078:
079: /**
080: * Returns the parent JSP writer.
081: */
082: public final JspWriter getEnclosingWriter() {
083: return _parent;
084: }
085:
086: public void writeOut(Writer writer) throws IOException {
087: throw new UnsupportedOperationException();
088: }
089:
090: public String getString() {
091: throw new UnsupportedOperationException();
092: }
093:
094: public Reader getReader() {
095: throw new UnsupportedOperationException();
096: }
097:
098: public void clearBody() {
099: throw new UnsupportedOperationException();
100: }
101:
102: /**
103: * Returns the autoFlush flag.
104: */
105: final public boolean isAutoFlush() {
106: return this .autoFlush;
107: }
108:
109: /**
110: * Pops the enclosing writer.
111: */
112: AbstractJspWriter popWriter() {
113: return (AbstractJspWriter) _parent;
114: }
115: }
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