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FilterReader.java
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124 lines (109 loc) · 2.48 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 reading filtered character streams.
* The abstract class <code>FilterReader</code> itself
* provides default methods that pass all requests to
* the contained stream. Subclasses of <code>FilterReader</code>
* should override some of these methods and may also provide
* additional methods and fields.
*
* @author Mark Reinhold
* @since JDK1.1
*/
public abstract class FilterReader extends Reader {
/**
* The underlying character-input stream.
*/
protected Reader in;
/**
* Creates a new filtered reader.
*
* @param in a Reader object providing the underlying stream.
* @throws NullPointerException if <code>in</code> is <code>null</code>
*/
protected FilterReader(Reader in) {
super(in);
this.in = in;
}
/**
* Reads a single character.
*
* @exception IOException If an I/O error occurs
*/
public int read() throws IOException {
return in.read();
}
/**
* Reads characters into a portion of an array.
*
* @exception IOException If an I/O error occurs
*/
public int read(char cbuf[], int off, int len) throws IOException {
return in.read(cbuf, off, len);
}
/**
* Skips characters.
*
* @exception IOException If an I/O error occurs
*/
public long skip(long n) throws IOException {
return in.skip(n);
}
/**
* Tells whether this stream is ready to be read.
*
* @exception IOException If an I/O error occurs
*/
public boolean ready() throws IOException {
return in.ready();
}
/**
* Tells whether this stream supports the mark() operation.
*/
public boolean markSupported() {
return in.markSupported();
}
/**
* Marks the present position in the stream.
*
* @exception IOException If an I/O error occurs
*/
public void mark(int readAheadLimit) throws IOException {
in.mark(readAheadLimit);
}
/**
* Resets the stream.
*
* @exception IOException If an I/O error occurs
*/
public void reset() throws IOException {
in.reset();
}
public void close() throws IOException {
in.close();
}
}