aQute.lib.io.ByteBufferDataInput Maven / Gradle / Ivy
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Show all versions of org.apache.aries.spifly.dynamic.framework.extension Show documentation
This framework extension fragment contains an extender that facilitates
the use of JRE SPI providers (components typically plugged in to the
JRE through META-INF/services resources).
package aQute.lib.io;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Objects;
public class ByteBufferDataInput implements DataInput {
private final ByteBuffer bb;
public static DataInput wrap(ByteBuffer bb) {
return new ByteBufferDataInput(bb);
}
public static DataInput wrap(byte[] b) {
return wrap(b, 0, b.length);
}
public static DataInput wrap(byte[] b, int off, int len) {
return wrap(ByteBuffer.wrap(b, off, len));
}
private ByteBufferDataInput(ByteBuffer bb) {
this.bb = Objects.requireNonNull(bb);
}
private int ranged(int n) {
if (n <= 0) {
return 0;
}
return Math.min(n, bb.remaining());
}
public ByteBuffer slice(int n) {
int limit = ranged(n);
ByteBuffer slice = bb.slice();
slice.limit(limit);
bb.position(bb.position() + limit);
return slice;
}
@Override
public void readFully(byte[] b) {
bb.get(b, 0, b.length);
}
@Override
public void readFully(byte[] b, int off, int len) {
bb.get(b, off, len);
}
@Override
public int skipBytes(int n) {
int skipped = ranged(n);
bb.position(bb.position() + skipped);
return skipped;
}
@Override
public boolean readBoolean() {
return bb.get() != 0;
}
@Override
public byte readByte() {
return bb.get();
}
@Override
public int readUnsignedByte() {
return Byte.toUnsignedInt(bb.get());
}
@Override
public short readShort() {
return bb.getShort();
}
@Override
public int readUnsignedShort() {
return Short.toUnsignedInt(bb.getShort());
}
@Override
public char readChar() {
return bb.getChar();
}
@Override
public int readInt() {
return bb.getInt();
}
@Override
public long readLong() {
return bb.getLong();
}
@Override
public float readFloat() {
return bb.getFloat();
}
@Override
public double readDouble() {
return bb.getDouble();
}
@Override
public String readLine() {
throw new UnsupportedOperationException();
}
@Override
public String readUTF() throws IOException {
return DataInputStream.readUTF(this);
}
}
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