| // Copyright 2004 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry.engine; |
| |
| import org.apache.tapestry.IMarkupWriter; |
| |
| /** |
| * A {@link IMarkupWriter} that does absolutely <em>nothing</em>; this |
| * is used during the rewind phase of the request cycle when output |
| * is discarded anyway. |
| * |
| * @author Howard Lewis Ship, David Solis |
| * @version $Id$ |
| * @since 0.2.9 |
| * |
| **/ |
| |
| public class NullWriter implements IMarkupWriter |
| { |
| private static IMarkupWriter shared; |
| |
| public static IMarkupWriter getSharedInstance() |
| { |
| if (shared == null) |
| shared = new NullWriter(); |
| |
| return shared; |
| } |
| |
| public void printRaw(char[] buffer, int offset, int length) |
| { |
| } |
| |
| public void printRaw(String value) |
| { |
| } |
| |
| public void println() |
| { |
| } |
| |
| public void print(char[] data, int offset, int length) |
| { |
| } |
| |
| public void print(char value) |
| { |
| } |
| |
| public void print(int value) |
| { |
| } |
| |
| public void print(String value) |
| { |
| } |
| |
| /** |
| * Returns <code>this</code>: since a NullWriter doesn't actually |
| * do anything, one is as good as another!. |
| * |
| **/ |
| |
| public IMarkupWriter getNestedWriter() |
| { |
| return this; |
| } |
| |
| public String getContentType() |
| { |
| return null; |
| } |
| |
| public void flush() |
| { |
| } |
| |
| public void end() |
| { |
| } |
| |
| public void end(String name) |
| { |
| } |
| |
| public void comment(String value) |
| { |
| } |
| |
| public void closeTag() |
| { |
| } |
| |
| public void close() |
| { |
| } |
| |
| /** |
| * Always returns false. |
| * |
| **/ |
| |
| public boolean checkError() |
| { |
| return false; |
| } |
| |
| public void beginEmpty(String name) |
| { |
| } |
| |
| public void begin(String name) |
| { |
| } |
| |
| public void attribute(String name, int value) |
| { |
| } |
| |
| public void attribute(String name, String value) |
| { |
| } |
| |
| /** |
| * @see org.apache.tapestry.IMarkupWriter#attribute(java.lang.String, boolean) |
| * |
| * @since 3.0 |
| **/ |
| |
| public void attribute(String name, boolean value) |
| { |
| } |
| |
| /** |
| * @see org.apache.tapestry.IMarkupWriter#attributeRaw(java.lang.String, java.lang.String) |
| * |
| * @since 3.0 |
| **/ |
| |
| public void attributeRaw(String name, String value) |
| { |
| } |
| } |