This class is an part implementation of DataInput. It wraps a Reader object.
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import java.io.DataInput;
import java.io.EOFException;
import java.io.IOException;
import java.io.Reader;
/**
* This class is an part implementation of DataInput. It wraps a Reader object.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 1.9.0
* @since 1.9.0
*/
public class ReaderDataInput implements DataInput {
protected Reader reader;
protected int pos;
int lastChar = -1;
public ReaderDataInput(Reader reader) {
this.reader = reader;
this.pos = 0;
}
// methods that implement java.io.DataInput
public final void readFully(byte[] b) throws IOException {
readFully(b, 0, b.length);
}
public final void readFully(byte[] bytes, int off,
int len) throws IOException {
if (len < 0) {
throw new IndexOutOfBoundsException();
}
int n = 0;
while (n < len) {
int b = read();
if (b < 0) {
throw new EOFException();
}
bytes[off + n++] = (byte) b;
}
}
public final boolean readBoolean() throws IOException {
int b = read();
if (b < 0) {
throw new EOFException();
}
return (b != 0);
}
public final byte readByte() throws IOException {
int b = read();
if (b < 0) {
throw new EOFException();
}
return (byte) b;
}
public final int readUnsignedByte() throws IOException {
int b = read();
if (b < 0) {
throw new EOFException();
}
return b;
}
public short readShort() throws IOException {
int b1 = read();
if (b1 < 0) {
throw new EOFException();
}
int b2 = read();
if (b2 < 0) {
throw new EOFException();
}
return (short) ((b1 << 8) | b2);
}
public final int readUnsignedShort() throws IOException {
int b1 = read();
int b2 = read();
if ((b1 | b2) < 0) {
throw new EOFException();
}
return ((b1 << 8) + (b2));
}
public final char readChar() throws IOException {
int b1 = read();
int b2 = read();
if ((b1 | b2) < 0) {
throw new EOFException();
}
return (char) ((b1 << 8) + (b2));
}
public int readInt() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public long readLong() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public final float readFloat() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public final double readDouble() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public int skipBytes(int n) throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public String readLine() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public String readUTF() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public int read() throws IOException {
if (lastChar >= 0) {
int val = lastChar & 0xff;
lastChar = -1;
pos++;
return val;
}
lastChar = reader.read();
if (lastChar < 0) {
return lastChar;
}
pos++;
return lastChar >> 8;
}
}
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