gnu.trove.TLongByteHashMap Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of trove4j Show documentation
Show all versions of trove4j Show documentation
Fork of trove4j library used in IntelliJ Platform.
The newest version!
///////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2001, Eric D. Friedman All Rights Reserved.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
///////////////////////////////////////////////////////////////////////////////
// THIS FILE IS AUTOGENERATED, PLEASE DO NOT EDIT OR ELSE
package gnu.trove;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
/**
* An open addressed Map implementation for long keys and byte values.
*
* Created: Sun Nov 4 08:52:45 2001
*
* @author Eric D. Friedman
*/
public class TLongByteHashMap extends TLongHash {
/** the values of the map */
protected transient byte[] _values;
/**
* Creates a new TLongByteHashMap instance with the default
* capacity and load factor.
*/
public TLongByteHashMap() {
}
/**
* Creates a new TLongByteHashMap instance with a prime
* capacity equal to or greater than initialCapacity and
* with the default load factor.
*
* @param initialCapacity an int value
*/
public TLongByteHashMap(int initialCapacity) {
super(initialCapacity);
}
/**
* Creates a new TLongByteHashMap instance with a prime
* capacity equal to or greater than initialCapacity and
* with the specified load factor.
*
* @param initialCapacity an int value
* @param loadFactor a float value
*/
public TLongByteHashMap(int initialCapacity, float loadFactor) {
super(initialCapacity, loadFactor);
}
/**
* Creates a new TLongByteHashMap instance with the default
* capacity and load factor.
* @param strategy used to compute hash codes and to compare keys.
*/
public TLongByteHashMap(TLongHashingStrategy strategy) {
super(strategy);
}
/**
* Creates a new TLongByteHashMap instance whose capacity
* is the next highest prime above initialCapacity + 1
* unless that value is already prime.
*
* @param initialCapacity an int value
* @param strategy used to compute hash codes and to compare keys.
*/
public TLongByteHashMap(int initialCapacity, TLongHashingStrategy strategy) {
super(initialCapacity, strategy);
}
/**
* Creates a new TLongByteHashMap instance with a prime
* value at or near the specified capacity and load factor.
*
* @param initialCapacity used to find a prime capacity for the table.
* @param loadFactor used to calculate the threshold over which
* rehashing takes place.
* @param strategy used to compute hash codes and to compare keys.
*/
public TLongByteHashMap(int initialCapacity, float loadFactor, TLongHashingStrategy strategy) {
super(initialCapacity, loadFactor, strategy);
}
/**
* @return a deep clone of this collection
*/
@Override
public Object clone() {
TLongByteHashMap m = (TLongByteHashMap)super.clone();
m._values = _values == null ? null : _values.clone();
return m;
}
/**
* @return a TLongByteIterator with access to this map's keys and values
*/
public TLongByteIterator iterator() {
return new TLongByteIterator(this);
}
/**
* initializes the hashtable to a prime capacity which is at least
* initialCapacity + 1.
*
* @param initialCapacity an int value
* @return the actual capacity chosen
*/
@Override
protected int setUp(int initialCapacity) {
int capacity = super.setUp(initialCapacity);
_values = initialCapacity == JUST_CREATED_CAPACITY ? null : new byte[capacity];
return capacity;
}
/**
* Inserts a key/value pair into the map.
*
* @param key an long value
* @param value an byte value
* @return the previous value associated with key,
* or null if none was found.
*/
public byte put(long key, byte value) {
byte previous = 0;
int index = insertionIndex(key);
boolean isNewMapping = true;
if (index < 0) {
index = -index -1;
previous = _values[index];
isNewMapping = false;
}
byte previousState = _states[index];
_set[index] = key;
_states[index] = FULL;
_values[index] = value;
if (isNewMapping) {
postInsertHook(previousState == FREE);
}
return previous;
}
/**
* rehashes the map to the new capacity.
*
* @param newCapacity an int value
*/
@Override
protected void rehash(int newCapacity) {
int oldCapacity = capacity();
long[] oldKeys = _set;
byte[] oldVals = _values;
byte[] oldStates = _states;
_set = new long[newCapacity];
_values = new byte[newCapacity];
_states = new byte[newCapacity];
for (int i = oldCapacity; i-- > 0;) {
if(oldStates[i] == FULL) {
long o = oldKeys[i];
int index = insertionIndex(o);
_set[index] = o;
_values[index] = oldVals[i];
_states[index] = FULL;
}
}
}
/**
* retrieves the value for key
*
* @param key an long value
* @return the value of key or null if no such mapping exists.
*/
public byte get(long key) {
int index = index(key);
return index < 0 ? 0 : _values[index];
}
/**
* Empties the map.
*
*/
@Override
public void clear() {
super.clear();
long[] keys = _set;
byte[] vals = _values;
if (vals == null) return;
byte[] states = _states;
for (int i = keys.length; i-- > 0;) {
keys[i] = 0;
vals[i] = 0;
states[i] = FREE;
}
}
/**
* Deletes a key/value pair from the map.
*
* @param key an long value
* @return an byte value
*/
public byte remove(long key) {
byte prev = 0;
int index = index(key);
if (index >= 0) {
prev = _values[index];
removeAt(index); // clear key,state; adjust size
}
return prev;
}
/**
* Compares this map with another map for equality of their stored
* entries.
*
* @param other an Object value
* @return a boolean value
*/
@Override
public boolean equals(Object other) {
if (! (other instanceof TLongByteHashMap)) {
return false;
}
TLongByteHashMap that = (TLongByteHashMap)other;
if (that.size() != size()) {
return false;
}
return forEachEntry(new EqProcedure(that));
}
@Override
public int hashCode() {
HashProcedure p = new HashProcedure();
forEachEntry(p);
return p.getHashCode();
}
private final class HashProcedure implements TLongByteProcedure {
private int h;
HashProcedure() {
}
public int getHashCode() {
return h;
}
public final boolean execute(long key, byte value) {
h += _hashingStrategy.computeHashCode(key) ^ HashFunctions.hash(value);
return true;
}
}
private static final class EqProcedure implements TLongByteProcedure {
private final TLongByteHashMap _otherMap;
EqProcedure(TLongByteHashMap otherMap) {
_otherMap = otherMap;
}
public final boolean execute(long key, byte value) {
int index = _otherMap.index(key);
return index >= 0 && eq(value, _otherMap.get(key));
}
/**
* Compare two bytes for equality.
*/
private static boolean eq(byte v1, byte v2) {
return v1 == v2;
}
}
/**
* removes the mapping at index from the map.
*
* @param index an int value
*/
@Override
protected void removeAt(int index) {
_values[index] = 0;
super.removeAt(index); // clear key, state; adjust size
}
/**
* Returns the values of the map.
*
* @return a Collection value
*/
public byte[] getValues() {
byte[] vals = new byte[size()];
byte[] v = _values;
byte[] states = _states;
if (states != null) {
for (int i = states.length, j = 0; i-- > 0;) {
if (states[i] == FULL) {
vals[j++] = v[i];
}
}
}
return vals;
}
/**
* returns the keys of the map.
*
* @return a Set value
*/
public long[] keys() {
long[] keys = new long[size()];
long[] k = _set;
byte[] states = _states;
if (states != null) {
for (int i = states.length, j = 0; i-- > 0;) {
if (states[i] == FULL) {
keys[j++] = k[i];
}
}
}
return keys;
}
/**
* checks for the presence of val in the values of the map.
*
* @param val an byte value
* @return a boolean value
*/
public boolean containsValue(byte val) {
byte[] states = _states;
byte[] vals = _values;
if (states != null) {
for (int i = states.length; i-- > 0;) {
if (states[i] == FULL && val == vals[i]) {
return true;
}
}
}
return false;
}
/**
* checks for the present of key in the keys of the map.
*
* @param key an long value
* @return a boolean value
*/
public boolean containsKey(long key) {
return contains(key);
}
/**
* Executes procedure for each key in the map.
*
* @param procedure a TLongProcedure value
* @return false if the loop over the keys terminated because
* the procedure returned false for some key.
*/
public boolean forEachKey(TLongProcedure procedure) {
return forEach(procedure);
}
/**
* Executes procedure for each value in the map.
*
* @param procedure a TByteProcedure value
* @return false if the loop over the values terminated because
* the procedure returned false for some value.
*/
public boolean forEachValue(TByteProcedure procedure) {
byte[] states = _states;
byte[] values = _values;
if (states != null) {
for (int i = states.length; i-- > 0;) {
if (states[i] == FULL && ! procedure.execute(values[i])) {
return false;
}
}
}
return true;
}
/**
* Executes procedure for each key/value entry in the
* map.
*
* @param procedure a TLongByteProcedure value
* @return false if the loop over the entries terminated because
* the procedure returned false for some entry.
*/
public boolean forEachEntry(TLongByteProcedure procedure) {
byte[] states = _states;
long[] keys = _set;
byte[] values = _values;
if (states != null) {
for (int i = states.length; i-- > 0;) {
if (states[i] == FULL && ! procedure.execute(keys[i],values[i])) {
return false;
}
}
}
return true;
}
/**
* Retains only those entries in the map for which the procedure
* returns a true value.
*
* @param procedure determines which entries to keep
* @return true if the map was modified.
*/
public boolean retainEntries(TLongByteProcedure procedure) {
boolean modified = false;
byte[] states = _states;
long[] keys = _set;
byte[] values = _values;
if (states != null) {
for (int i = states.length; i-- > 0;) {
if (states[i] == FULL && ! procedure.execute(keys[i],values[i])) {
removeAt(i);
modified = true;
}
}
}
return modified;
}
/**
* Transform the values in this map using function.
*
* @param function a TByteFunction value
*/
public void transformValues(TByteFunction function) {
byte[] states = _states;
byte[] values = _values;
if (states != null) {
for (int i = states.length; i-- > 0;) {
if (states[i] == FULL) {
values[i] = function.execute(values[i]);
}
}
}
}
/**
* Increments the primitive value mapped to key by 1
*
* @param key the key of the value to increment
* @return true if a mapping was found and modified.
*/
public boolean increment(long key) {
return adjustValue(key, (byte) 1);
}
/**
* Adjusts the primitive value mapped to key.
*
* @param key the key of the value to increment
* @param amount the amount to adjust the value by.
* @return true if a mapping was found and modified.
*/
public boolean adjustValue(long key, byte amount) {
int index = index(key);
if (index < 0) {
return false;
} else {
_values[index] += amount;
return true;
}
}
private void writeObject(ObjectOutputStream stream)
throws IOException {
stream.defaultWriteObject();
// number of entries
stream.writeInt(_size);
SerializationProcedure writeProcedure = new SerializationProcedure(stream);
if (! forEachEntry(writeProcedure)) {
throw writeProcedure.exception;
}
}
private void readObject(ObjectInputStream stream)
throws IOException, ClassNotFoundException {
stream.defaultReadObject();
int size = stream.readInt();
setUp(size);
while (size-- > 0) {
long key = stream.readLong();
byte val = stream.readByte();
put(key, val);
}
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
forEachEntry(new TLongByteProcedure() {
public boolean execute(long key, byte value) {
if (sb.length() != 0) {
sb.append(',').append(' ');
}
sb.append(key);
sb.append('=');
sb.append(value);
return true;
}
});
sb.append('}');
sb.insert(0, '{');
return sb.toString();
}
} // TLongByteHashMap