it.unimi.dsi.fastutil.longs.AbstractLong2ByteMap Maven / Gradle / Ivy
/*
* Copyright (C) 2002-2017 Sebastiano Vigna
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package it.unimi.dsi.fastutil.longs;
import it.unimi.dsi.fastutil.bytes.ByteCollection;
import it.unimi.dsi.fastutil.bytes.AbstractByteCollection;
import it.unimi.dsi.fastutil.bytes.ByteIterator;
import it.unimi.dsi.fastutil.bytes.AbstractByteIterator;
import it.unimi.dsi.fastutil.objects.ObjectSet;
import it.unimi.dsi.fastutil.objects.ObjectIterator;
import java.util.Iterator;
import java.util.Map;
/** An abstract class providing basic methods for maps implementing a type-specific interface.
*
* Optional operations just throw an {@link
* UnsupportedOperationException}. Generic versions of accessors delegate to
* the corresponding type-specific counterparts following the interface rules
* (they take care of returning {@code null} on a missing key).
*
*
As a further help, this class provides a {@link BasicEntry BasicEntry} inner class
* that implements a type-specific version of {@link java.util.Map.Entry}; it
* is particularly useful for those classes that do not implement their own
* entries (e.g., most immutable maps).
*/
public abstract class AbstractLong2ByteMap extends AbstractLong2ByteFunction implements Long2ByteMap , java.io.Serializable {
private static final long serialVersionUID = -4940583368468432370L;
protected AbstractLong2ByteMap() {}
@Override
public boolean containsValue(byte v) {
return values().contains(v);
}
/** {@inheritDoc}
* @deprecated Please use the corresponding type-specific method instead. */
@Deprecated
@Override
public boolean containsValue(Object ov) {
if (ov == null) return false;
return containsValue(((((Byte)(ov)).byteValue())));
}
@Override
public boolean containsKey(long k) {
ObjectIterator i = long2ByteEntrySet().iterator();
while(i.hasNext())
if (i.next().getLongKey() == k)
return true;
return false;
}
/** Puts all pairs in the given map.
* If the map implements the interface of this map,
* it uses the faster iterators.
*
* @param m a map.
*/
@SuppressWarnings("deprecation")
public void putAll(Map m) {
int n = m.size();
final Iterator> i = m.entrySet().iterator();
if (m instanceof Long2ByteMap) {
Long2ByteMap.Entry e;
while(n-- != 0) {
e = (Long2ByteMap.Entry )i.next();
put(e.getLongKey(), e.getByteValue());
}
}
else {
Map.Entry e;
while(n-- != 0) {
e = i.next();
put(e.getKey(), e.getValue());
}
}
}
public boolean isEmpty() {
return size() == 0;
}
/** This class provides a basic but complete type-specific entry class for all those maps implementations
* that do not have entries on their own (e.g., most immutable maps).
*
* This class does not implement {@link java.util.Map.Entry#setValue(Object) setValue()}, as the modification
* would not be reflected in the base map.
*/
public static class BasicEntry implements Long2ByteMap.Entry {
protected long key;
protected byte value;
public BasicEntry(final Long key, final Byte value) {
this.key = ((key).longValue());
this.value = ((value).byteValue());
}
public BasicEntry(final long key, final byte value) {
this.key = key;
this.value = value;
}
/** {@inheritDoc}
* @deprecated Please use the corresponding type-specific method instead. */
@Deprecated
@Override
public Long getKey() {
return (Long.valueOf(key));
}
@Override
public long getLongKey() {
return key;
}
/** {@inheritDoc}
* @deprecated Please use the corresponding type-specific method instead. */
@Deprecated
@Override
public Byte getValue() {
return (Byte.valueOf(value));
}
@Override
public byte getByteValue() {
return value;
}
@Override
public byte setValue(final byte value) {
throw new UnsupportedOperationException();
}
/** {@inheritDoc}
* @deprecated Please use the corresponding type-specific method instead. */
@Deprecated
@Override
public Byte setValue(final Byte value) {
return Byte.valueOf(setValue(value.byteValue()));
}
@Override
public boolean equals(final Object o) {
if (!(o instanceof Map.Entry)) return false;
final Map.Entry e = (Map.Entry)o;
if (e.getKey() == null || ! (e.getKey() instanceof Long)) return false;
if (e.getValue() == null || ! (e.getValue() instanceof Byte)) return false;
return ( (key) == (((((Long)(e.getKey())).longValue()))) ) && ( (value) == (((((Byte)(e.getValue())).byteValue()))) );
}
@Override
public int hashCode() {
return it.unimi.dsi.fastutil.HashCommon.long2int(key) ^ (value);
}
@Override
public String toString() {
return key + "->" + value;
}
}
/** Returns a type-specific-set view of the keys of this map.
*
*
The view is backed by the set returned by {@link #entrySet()}. Note that
* no attempt is made at caching the result of this method, as this would
* require adding some attributes that lightweight implementations would
* not need. Subclasses may easily override this policy by calling
* this method and caching the result, but implementors are encouraged to
* write more efficient ad-hoc implementations.
*
* @return a set view of the keys of this map; it may be safely cast to a type-specific interface.
*/
@Override
public LongSet keySet() {
return new AbstractLongSet () {
public boolean contains(final long k) { return containsKey(k); }
public int size() { return AbstractLong2ByteMap.this.size(); }
public void clear() { AbstractLong2ByteMap.this.clear(); }
public LongIterator iterator() {
return new AbstractLongIterator () {
final ObjectIterator> i = entrySet().iterator();
@Override
public long nextLong() { return ((Long2ByteMap.Entry )i.next()).getLongKey(); };
@Override
public boolean hasNext() { return i.hasNext(); }
@Override
public void remove() { i.remove(); }
};
}
};
}
/** Returns a type-specific-set view of the values of this map.
*
* The view is backed by the set returned by {@link #entrySet()}. Note that
* no attempt is made at caching the result of this method, as this would
* require adding some attributes that lightweight implementations would
* not need. Subclasses may easily override this policy by calling
* this method and caching the result, but implementors are encouraged to
* write more efficient ad-hoc implementations.
*
* @return a set view of the values of this map; it may be safely cast to a type-specific interface.
*/
@Override
public ByteCollection values() {
return new AbstractByteCollection () {
public boolean contains(final byte k) { return containsValue(k); }
public int size() { return AbstractLong2ByteMap.this.size(); }
public void clear() { AbstractLong2ByteMap.this.clear(); }
public ByteIterator iterator() {
return new AbstractByteIterator () {
final ObjectIterator> i = entrySet().iterator();
/** {@inheritDoc}
* @deprecated Please use the corresponding type-specific method instead. */
@Deprecated
public byte nextByte() { return ((Long2ByteMap.Entry )i.next()).getByteValue(); };
public boolean hasNext() { return i.hasNext(); }
};
}
};
}
/** {@inheritDoc}
* @deprecated Please use the corresponding type-specific method instead. */
@Deprecated
@Override
@SuppressWarnings({ "unchecked", "rawtypes" })
public ObjectSet> entrySet() {
return (ObjectSet)long2ByteEntrySet();
}
/** Returns a hash code for this map.
*
* The hash code of a map is computed by summing the hash codes of its entries.
*
* @return a hash code for this map.
*/
@Override
public int hashCode() {
int h = 0, n = size();
final ObjectIterator> i = entrySet().iterator();
while(n-- != 0) h += i.next().hashCode();
return h;
}
@Override
public boolean equals(Object o) {
if (o == this) return true;
if (! (o instanceof Map)) return false;
Map m = (Map)o;
if (m.size() != size()) return false;
return entrySet().containsAll(m.entrySet());
}
@Override
public String toString() {
final StringBuilder s = new StringBuilder();
final ObjectIterator> i = entrySet().iterator();
int n = size();
Long2ByteMap.Entry e;
boolean first = true;
s.append("{");
while(n-- != 0) {
if (first) first = false;
else s.append(", ");
e = (Long2ByteMap.Entry )i.next();
s.append(String.valueOf(e.getLongKey()));
s.append("=>");
s.append(String.valueOf(e.getByteValue()));
}
s.append("}");
return s.toString();
}
}