freemarker.template.utility.NullWriter Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 freemarker.template.utility;
import java.io.IOException;
import java.io.Writer;
/**
* A {@link Writer} that simply drops what it gets.
*
* @since 2.3.20
*/
public final class NullWriter extends Writer {
public static final NullWriter INSTANCE = new NullWriter();
/** Can't be instantiated; use {@link #INSTANCE}. */
private NullWriter() { }
@Override
public void write(char[] cbuf, int off, int len) throws IOException {
// Do nothing
}
@Override
public void flush() throws IOException {
// Do nothing
}
@Override
public void close() throws IOException {
// Do nothing
}
@Override
public void write(int c) throws IOException {
// Do nothing
}
@Override
public void write(char[] cbuf) throws IOException {
// Do nothing
}
@Override
public void write(String str) throws IOException {
// Do nothing
}
@Override
public void write(String str, int off, int len) throws IOException {
// Do nothing
}
@Override
public Writer append(CharSequence csq) throws IOException {
// Do nothing
return this;
}
@Override
public Writer append(CharSequence csq, int start, int end) throws IOException {
// Do nothing
return this;
}
@Override
public Writer append(char c) throws IOException {
// Do nothing
return this;
}
}