package org.mapdb.serializer;
import org.mapdb.DataInput2;
import org.mapdb.DataOutput2;
import org.mapdb.Serializer;
import java.io.IOException;
import java.util.Arrays;
import java.util.Comparator;
/**
* Created by jan on 2/28/16.
*/
public abstract class SerializerFourByte<E> implements GroupSerializer<E> {
protected abstract E unpack(int l);
protected abstract int pack(E l);
@Override
public boolean isTrusted() {
return true;
}
@Override
public int fixedSize() {
return 4;
}
@Override
public E valueArrayGet(Object vals, int pos) {
return unpack(((int[]) vals)[pos]);
}
@Override
public int valueArraySize(Object vals) {
return ((int[]) vals).length;
}
@Override
public Object valueArrayEmpty() {
return new int[0];
}
@Override
public Object valueArrayPut(Object vals, int pos, E newValue) {
int[] array = (int[]) vals;
final int[] ret = Arrays.copyOf(array, array.length + 1);
if (pos < array.length) {
System.arraycopy(array, pos, ret, pos + 1, array.length - pos);
}
ret[pos] = pack(newValue);
return ret;
}
@Override
public Object valueArrayUpdateVal(Object vals, int pos, E newValue) {
int[] vals2 = ((int[]) vals).clone();
vals2[pos] = pack(newValue);
return vals2;
}
@Override
public Object valueArrayFromArray(Object[] objects) {
int[] ret = new int[objects.length];
int pos = 0;
for (Object o : objects) {
ret[pos++] = pack((E) o);
}
return ret;
}
@Override
public Object valueArrayCopyOfRange(Object vals, int from, int to) {
return Arrays.copyOfRange((int[]) vals, from, to);
}
@Override
public Object valueArrayDeleteValue(Object vals, int pos) {
int[] valsOrig = (int[]) vals;
int[] vals2 = new int[valsOrig.length - 1];
System.arraycopy(vals, 0, vals2, 0, pos - 1);
System.arraycopy(vals, pos, vals2, pos - 1, vals2.length - (pos - 1));
return vals2;
}
@Override
public void valueArraySerialize(DataOutput2 out, Object vals) throws IOException {
for (int o : (int[]) vals) {
out.writeInt(o);
}
}
@Override
public Object valueArrayDeserialize(DataInput2 in, int size) throws IOException {
int[] ret = new int[size];
for (int i = 0; i < size; i++) {
ret[i] = in.readInt();
}
return ret;
}
@Override
final public int valueArraySearch(Object keys, E key, Comparator comparator) {
if (comparator == this)
return valueArraySearch(keys, key);
int[] array = (int[]) keys;
int lo = 0;
int hi = array.length - 1;
while (lo <= hi) {
int mid = (lo + hi) >>> 1;
int compare = comparator.compare(key, unpack(array[mid]));
if (compare == 0)
return mid;
else if (compare < 0)
hi = mid - 1;
else
lo = mid + 1;
}
return -(lo + 1);
}
@Override
public E valueArrayBinaryGet(DataInput2 input, int keysLen, int pos) throws IOException {
input.skipBytes(pos*4);
return unpack(input.readInt());
}
}