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FilterWriter.java
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107 lines (95 loc) · 2.29 KB
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/*
* Copyright (c) 1996, 2005, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package java.io;
/**
* Abstract class for writing filtered character streams.
* The abstract class <code>FilterWriter</code> itself
* provides default methods that pass all requests to the
* contained stream. Subclasses of <code>FilterWriter</code>
* should override some of these methods and may also
* provide additional methods and fields.
*
* @author Mark Reinhold
* @since JDK1.1
*/
public abstract class FilterWriter extends Writer {
/**
* The underlying character-output stream.
*/
protected Writer out;
/**
* Create a new filtered writer.
*
* @param out a Writer object to provide the underlying stream.
* @throws NullPointerException if <code>out</code> is <code>null</code>
*/
protected FilterWriter(Writer out) {
super(out);
this.out = out;
}
/**
* Writes a single character.
*
* @exception IOException If an I/O error occurs
*/
public void write(int c) throws IOException {
out.write(c);
}
/**
* Writes a portion of an array of characters.
*
* @param cbuf Buffer of characters to be written
* @param off Offset from which to start reading characters
* @param len Number of characters to be written
*
* @exception IOException If an I/O error occurs
*/
public void write(char cbuf[], int off, int len) throws IOException {
out.write(cbuf, off, len);
}
/**
* Writes a portion of a string.
*
* @param str String to be written
* @param off Offset from which to start reading characters
* @param len Number of characters to be written
*
* @exception IOException If an I/O error occurs
*/
public void write(String str, int off, int len) throws IOException {
out.write(str, off, len);
}
/**
* Flushes the stream.
*
* @exception IOException If an I/O error occurs
*/
public void flush() throws IOException {
out.flush();
}
public void close() throws IOException {
out.close();
}
}