package it.unimi.dsi.fastutil.bytes;
import java.util.Map;
import java.util.NoSuchElementException;
import it.unimi.dsi.fastutil.objects.AbstractObjectSet;
import it.unimi.dsi.fastutil.objects.ObjectIterator;
import it.unimi.dsi.fastutil.doubles.DoubleCollection;
import it.unimi.dsi.fastutil.doubles.AbstractDoubleCollection;
import it.unimi.dsi.fastutil.doubles.DoubleArrays;
public class Byte2DoubleArrayMap extends AbstractByte2DoubleMap implements java.io.Serializable, Cloneable {
private static final long serialVersionUID = 1L;
private transient byte[] key;
private transient double[] value;
private int size;
public Byte2DoubleArrayMap(final byte[] key, final double[] value) {
this.key = key;
this.value = value;
size = key.length;
if (key.length != value.length)
throw new IllegalArgumentException(
"Keys and values have different lengths (" + key.length + ", " + value.length + ")");
}
public Byte2DoubleArrayMap() {
this.key = ByteArrays.EMPTY_ARRAY;
this.value = DoubleArrays.EMPTY_ARRAY;
}
public Byte2DoubleArrayMap(final int capacity) {
this.key = new byte[capacity];
this.value = new double[capacity];
}
public Byte2DoubleArrayMap(final Byte2DoubleMap m) {
this(m.size());
putAll(m);
}
public Byte2DoubleArrayMap(final Map<? extends Byte, ? extends Double> m) {
this(m.size());
putAll(m);
}
public Byte2DoubleArrayMap(final byte[] key, final double[] value, final int size) {
this.key = key;
this.value = value;
this.size = size;
if (key.length != value.length)
throw new IllegalArgumentException(
"Keys and values have different lengths (" + key.length + ", " + value.length + ")");
if (size > key.length)
throw new IllegalArgumentException("The provided size (" + size
+ ") is larger than or equal to the backing-arrays size (" + key.length + ")");
}
private final class EntrySet extends AbstractObjectSet<Byte2DoubleMap.Entry> implements FastEntrySet {
@Override
public ObjectIterator<Byte2DoubleMap.Entry> iterator() {
return new ObjectIterator<Byte2DoubleMap.Entry>() {
int curr = -1, next = 0;
@Override
public boolean hasNext() {
return next < size;
}
@Override
public Entry next() {
if (!hasNext())
throw new NoSuchElementException();
return new AbstractByte2DoubleMap.BasicEntry(key[curr = next], value[next++]);
}
@Override
public void remove() {
if (curr == -1)
throw new IllegalStateException();
curr = -1;
final int tail = size-- - next--;
System.arraycopy(key, next + 1, key, next, tail);
System.arraycopy(value, next + 1, value, next, tail);
}
};
}
@Override
public ObjectIterator<Byte2DoubleMap.Entry> fastIterator() {
return new ObjectIterator<Byte2DoubleMap.Entry>() {
int next = 0, curr = -1;
final BasicEntry entry = new BasicEntry();
@Override
public boolean hasNext() {
return next < size;
}
@Override
public Entry next() {
if (!hasNext())
throw new NoSuchElementException();
entry.key = key[curr = next];
entry.value = value[next++];
return entry;
}
@Override
public void remove() {
if (curr == -1)
throw new IllegalStateException();
curr = -1;
final int tail = size-- - next--;
System.arraycopy(key, next + 1, key, next, tail);
System.arraycopy(value, next + 1, value, next, tail);
}
};
}
@Override
public int size() {
return size;
}
@Override
public boolean contains(Object o) {
if (!(o instanceof Map.Entry))
return false;
final Map.Entry<?, ?> e = (Map.Entry<?, ?>) o;
if (e.getKey() == null || !(e.getKey() instanceof Byte))
return false;
if (e.getValue() == null || !(e.getValue() instanceof Double))
return false;
final byte k = ((Byte) (e.getKey())).byteValue();
return Byte2DoubleArrayMap.this.containsKey(k)
&& (Double.doubleToLongBits(Byte2DoubleArrayMap.this.get(k)) == Double
.doubleToLongBits(((Double) (e.getValue())).doubleValue()));
}
@Override
public boolean remove(final Object o) {
if (!(o instanceof Map.Entry))
return false;
final Map.Entry<?, ?> e = (Map.Entry<?, ?>) o;
if (e.getKey() == null || !(e.getKey() instanceof Byte))
return false;
if (e.getValue() == null || !(e.getValue() instanceof Double))
return false;
final byte k = ((Byte) (e.getKey())).byteValue();
final double v = ((Double) (e.getValue())).doubleValue();
final int oldPos = Byte2DoubleArrayMap.this.findKey(k);
if (oldPos == -1
|| !(Double.doubleToLongBits(v) == Double.doubleToLongBits(Byte2DoubleArrayMap.this.value[oldPos])))
return false;
final int tail = size - oldPos - 1;
System.arraycopy(Byte2DoubleArrayMap.this.key, oldPos + 1, Byte2DoubleArrayMap.this.key, oldPos, tail);
System.arraycopy(Byte2DoubleArrayMap.this.value, oldPos + 1, Byte2DoubleArrayMap.this.value, oldPos, tail);
Byte2DoubleArrayMap.this.size--;
return true;
}
}
@Override
public FastEntrySet byte2DoubleEntrySet() {
return new EntrySet();
}
private int findKey(final byte k) {
final byte[] key = this.key;
for (int i = size; i-- != 0;)
if (((key[i]) == (k)))
return i;
return -1;
}
@Override
public double get(final byte k) {
final byte[] key = this.key;
for (int i = size; i-- != 0;)
if (((key[i]) == (k)))
return value[i];
return defRetValue;
}
@Override
public int size() {
return size;
}
@Override
public void clear() {
size = 0;
}
@Override
public boolean containsKey(final byte k) {
return findKey(k) != -1;
}
@Override
public boolean containsValue(double v) {
for (int i = size; i-- != 0;)
if ((Double.doubleToLongBits(value[i]) == Double.doubleToLongBits(v)))
return true;
return false;
}
@Override
public boolean isEmpty() {
return size == 0;
}
@Override
public double put(byte k, double v) {
final int oldKey = findKey(k);
if (oldKey != -1) {
final double oldValue = value[oldKey];
value[oldKey] = v;
return oldValue;
}
if (size == key.length) {
final byte[] newKey = new byte[size == 0 ? 2 : size * 2];
final double[] newValue = new double[size == 0 ? 2 : size * 2];
for (int i = size; i-- != 0;) {
newKey[i] = key[i];
newValue[i] = value[i];
}
key = newKey;
value = newValue;
}
key[size] = k;
value[size] = v;
size++;
return defRetValue;
}
@Override
public double remove(final byte k) {
final int oldPos = findKey(k);
if (oldPos == -1)
return defRetValue;
final double oldValue = value[oldPos];
final int tail = size - oldPos - 1;
System.arraycopy(key, oldPos + 1, key, oldPos, tail);
System.arraycopy(value, oldPos + 1, value, oldPos, tail);
size--;
return oldValue;
}
@Override
public ByteSet keySet() {
return new AbstractByteSet() {
@Override
public boolean contains(final byte k) {
return findKey(k) != -1;
}
@Override
public boolean remove(final byte k) {
final int oldPos = findKey(k);
if (oldPos == -1)
return false;
final int tail = size - oldPos - 1;
System.arraycopy(key, oldPos + 1, key, oldPos, tail);
System.arraycopy(value, oldPos + 1, value, oldPos, tail);
size--;
return true;
}
@Override
public ByteIterator iterator() {
return new ByteIterator() {
int pos = 0;
@Override
public boolean hasNext() {
return pos < size;
}
@Override
public byte nextByte() {
if (!hasNext())
throw new NoSuchElementException();
return key[pos++];
}
@Override
public void remove() {
if (pos == 0)
throw new IllegalStateException();
final int tail = size - pos;
System.arraycopy(key, pos, key, pos - 1, tail);
System.arraycopy(value, pos, value, pos - 1, tail);
size--;
}
};
}
@Override
public int size() {
return size;
}
@Override
public void clear() {
Byte2DoubleArrayMap.this.clear();
}
};
}
@Override
public DoubleCollection values() {
return new AbstractDoubleCollection() {
@Override
public boolean contains(final double v) {
return containsValue(v);
}
@Override
public it.unimi.dsi.fastutil.doubles.DoubleIterator iterator() {
return new it.unimi.dsi.fastutil.doubles.DoubleIterator() {
int pos = 0;
@Override
public boolean hasNext() {
return pos < size;
}
@Override
public double nextDouble() {
if (!hasNext())
throw new NoSuchElementException();
return value[pos++];
}
@Override
public void remove() {
if (pos == 0)
throw new IllegalStateException();
final int tail = size - pos;
System.arraycopy(key, pos, key, pos - 1, tail);
System.arraycopy(value, pos, value, pos - 1, tail);
size--;
}
};
}
@Override
public int size() {
return size;
}
@Override
public void clear() {
Byte2DoubleArrayMap.this.clear();
}
};
}
@Override
public Byte2DoubleArrayMap clone() {
Byte2DoubleArrayMap c;
try {
c = (Byte2DoubleArrayMap) super.clone();
} catch (CloneNotSupportedException cantHappen) {
throw new InternalError();
}
c.key = key.clone();
c.value = value.clone();
return c;
}
private void writeObject(java.io.ObjectOutputStream s) throws java.io.IOException {
s.defaultWriteObject();
for (int i = 0; i < size; i++) {
s.writeByte(key[i]);
s.writeDouble(value[i]);
}
}
private void readObject(java.io.ObjectInputStream s) throws java.io.IOException, ClassNotFoundException {
s.defaultReadObject();
key = new byte[size];
value = new double[size];
for (int i = 0; i < size; i++) {
key[i] = s.readByte();
value[i] = s.readDouble();
}
}
}