forked from kohanyirobert/ebson
/
BasicObjectId.java
83 lines (64 loc) · 2.27 KB
/
BasicObjectId.java
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package com.github.kohanyirobert.ebson;
import com.google.common.base.Objects;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import javax.xml.bind.DatatypeConverter;
final class BasicObjectId implements BsonObjectId {
private static final int TIME_LENGTH = 4;
private static final int MACHINE_ID_LENGTH = 3;
private static final int PROCESS_ID_LENGTH = 2;
private static final int INCREMENT_LENGTH = 3;
private static final int OBJECT_ID_LENGTH =
TIME_LENGTH + MACHINE_ID_LENGTH + PROCESS_ID_LENGTH + INCREMENT_LENGTH;
private final ByteBuffer time;
private final ByteBuffer machineId;
private final ByteBuffer processId;
private final ByteBuffer increment;
private final ByteBuffer objectId = ByteBuffer.allocate(OBJECT_ID_LENGTH).order(ByteOrder.BIG_ENDIAN);
BasicObjectId(ByteBuffer buffer) {
int oldLimit = buffer.limit();
buffer.limit(buffer.position() + OBJECT_ID_LENGTH);
objectId.put(buffer).flip();
assert buffer.limit() == oldLimit;
time = ByteBuffer.wrap(objectId.array(), 0, TIME_LENGTH).order(ByteOrder.BIG_ENDIAN);
machineId = ByteBuffer.wrap(objectId.array(), TIME_LENGTH, MACHINE_ID_LENGTH).order(ByteOrder.LITTLE_ENDIAN);
processId = ByteBuffer.wrap(objectId.array(), MACHINE_ID_LENGTH, PROCESS_ID_LENGTH).order(ByteOrder.LITTLE_ENDIAN);
increment = ByteBuffer.wrap(objectId.array(), PROCESS_ID_LENGTH, INCREMENT_LENGTH).order(ByteOrder.BIG_ENDIAN);
}
@Override
public ByteBuffer objectId() {
return objectId.asReadOnlyBuffer();
}
@Override
public ByteBuffer time() {
return time.asReadOnlyBuffer();
}
@Override
public ByteBuffer machineId() {
return machineId.asReadOnlyBuffer();
}
@Override
public ByteBuffer processId() {
return processId.asReadOnlyBuffer();
}
@Override
public ByteBuffer increment() {
return increment.asReadOnlyBuffer();
}
@Override
public int hashCode() {
return Objects.hashCode(objectId);
}
@Override
public boolean equals(Object object) {
if (object instanceof BsonObjectId) {
BsonObjectId other = (BsonObjectId) object;
return objectId.equals(other.objectId());
}
return false;
}
@Override
public String toString() {
return DatatypeConverter.printHexBinary(objectId.array()).toLowerCase();
}
}