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/* Generic definitions */
/* Assertions (useful to generate conditional code) */
/* Current type and class (and size, if applicable) */
/* Value methods */
/* Interfaces (keys) */
/* Interfaces (values) */
/* Abstract implementations (keys) */
/* Abstract implementations (values) */
/* Static containers (keys) */
/* Static containers (values) */
/* Implementations */
/* Synchronized wrappers */
/* Unmodifiable wrappers */
/* Other wrappers */
/* Methods (keys) */
/* Methods (values) */
/* Methods (keys/values) */
/* Methods that have special names depending on keys (but the special names depend on values) */
/* Equality */
/* Object/Reference-only definitions (keys) */
/* Primitive-type-only definitions (keys) */
/* Object/Reference-only definitions (values) */
/* Primitive-type-only definitions (values) */
/*
* Copyright (C) 2002-2015 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.chars;
/** A class providing static methods and objects that do useful things with type-specific functions.
*
* @see it.unimi.dsi.fastutil.Function
* @see java.util.Collections */
public class Char2ShortFunctions {
private Char2ShortFunctions() {}
/** An immutable class representing an empty type-specific function.
*
* This class may be useful to implement your own in case you subclass a type-specific function. */
public static class EmptyFunction extends AbstractChar2ShortFunction implements java.io.Serializable, Cloneable {
private static final long serialVersionUID = -7046029254386353129L;
protected EmptyFunction() {}
public short get( final char k ) {
return ( (short)0 );
}
public boolean containsKey( final char k ) {
return false;
}
public short defaultReturnValue() {
return ( (short)0 );
}
public void defaultReturnValue( final short defRetValue ) {
throw new UnsupportedOperationException();
}
public Short get( final Object k ) {
return null;
}
public int size() {
return 0;
}
public void clear() {}
private Object readResolve() {
return EMPTY_FUNCTION;
}
public Object clone() {
return EMPTY_FUNCTION;
}
}
/** An empty type-specific function (immutable). It is serializable and cloneable. */
public static final EmptyFunction EMPTY_FUNCTION = new EmptyFunction();
/** An immutable class representing a type-specific singleton function.
*
*
This class may be useful to implement your own in case you subclass a type-specific function. */
public static class Singleton extends AbstractChar2ShortFunction implements java.io.Serializable, Cloneable {
private static final long serialVersionUID = -7046029254386353129L;
protected final char key;
protected final short value;
protected Singleton( final char key, final short value ) {
this.key = key;
this.value = value;
}
public boolean containsKey( final char k ) {
return ( ( key ) == ( k ) );
}
public short get( final char k ) {
if ( ( ( key ) == ( k ) ) ) return value;
return defRetValue;
}
public int size() {
return 1;
}
public Object clone() {
return this;
}
}
/** Returns a type-specific immutable function containing only the specified pair. The returned function is serializable and cloneable.
*
*
Note that albeit the returned function is immutable, its default return value may be changed.
*
* @param key the only key of the returned function.
* @param value the only value of the returned function.
* @return a type-specific immutable function containing just the pair <key,value>. */
public static Char2ShortFunction singleton( final char key, short value ) {
return new Singleton( key, value );
}
/** Returns a type-specific immutable function containing only the specified pair. The returned function is serializable and cloneable.
*
*
Note that albeit the returned function is immutable, its default return value may be changed.
*
* @param key the only key of the returned function.
* @param value the only value of the returned function.
* @return a type-specific immutable function containing just the pair <key,value>. */
public static Char2ShortFunction singleton( final Character key, final Short value ) {
return new Singleton( ( ( key ).charValue() ), ( ( value ).shortValue() ) );
}
/** A synchronized wrapper class for functions. */
public static class SynchronizedFunction extends AbstractChar2ShortFunction implements java.io.Serializable {
private static final long serialVersionUID = -7046029254386353129L;
protected final Char2ShortFunction function;
protected final Object sync;
protected SynchronizedFunction( final Char2ShortFunction f, final Object sync ) {
if ( f == null ) throw new NullPointerException();
this.function = f;
this.sync = sync;
}
protected SynchronizedFunction( final Char2ShortFunction f ) {
if ( f == null ) throw new NullPointerException();
this.function = f;
this.sync = this;
}
public int size() {
synchronized ( sync ) {
return function.size();
}
}
public boolean containsKey( final char k ) {
synchronized ( sync ) {
return function.containsKey( k );
}
}
public short defaultReturnValue() {
synchronized ( sync ) {
return function.defaultReturnValue();
}
}
public void defaultReturnValue( final short defRetValue ) {
synchronized ( sync ) {
function.defaultReturnValue( defRetValue );
}
}
public short put( final char k, final short v ) {
synchronized ( sync ) {
return function.put( k, v );
}
}
public void clear() {
synchronized ( sync ) {
function.clear();
}
}
public String toString() {
synchronized ( sync ) {
return function.toString();
}
}
public Short put( final Character k, final Short v ) {
synchronized ( sync ) {
return function.put( k, v );
}
}
public Short get( final Object k ) {
synchronized ( sync ) {
return function.get( k );
}
}
public Short remove( final Object k ) {
synchronized ( sync ) {
return function.remove( k );
}
}
public short remove( final char k ) {
synchronized ( sync ) {
return function.remove( k );
}
}
public short get( final char k ) {
synchronized ( sync ) {
return function.get( k );
}
}
public boolean containsKey( final Object ok ) {
synchronized ( sync ) {
return function.containsKey( ok );
}
}
}
/** Returns a synchronized type-specific function backed by the given type-specific function.
*
* @param f the function to be wrapped in a synchronized function.
* @return a synchronized view of the specified function.
* @see java.util.Collections#synchronizedMap(java.util.Map) */
public static Char2ShortFunction synchronize( final Char2ShortFunction f ) {
return new SynchronizedFunction( f );
}
/** Returns a synchronized type-specific function backed by the given type-specific function, using an assigned object to synchronize.
*
* @param f the function to be wrapped in a synchronized function.
* @param sync an object that will be used to synchronize the access to the function.
* @return a synchronized view of the specified function.
* @see java.util.Collections#synchronizedMap(java.util.Map) */
public static Char2ShortFunction synchronize( final Char2ShortFunction f, final Object sync ) {
return new SynchronizedFunction( f, sync );
}
/** An unmodifiable wrapper class for functions. */
public static class UnmodifiableFunction extends AbstractChar2ShortFunction implements java.io.Serializable {
private static final long serialVersionUID = -7046029254386353129L;
protected final Char2ShortFunction function;
protected UnmodifiableFunction( final Char2ShortFunction f ) {
if ( f == null ) throw new NullPointerException();
this.function = f;
}
public int size() {
return function.size();
}
public boolean containsKey( final char k ) {
return function.containsKey( k );
}
public short defaultReturnValue() {
return function.defaultReturnValue();
}
public void defaultReturnValue( final short defRetValue ) {
throw new UnsupportedOperationException();
}
public short put( final char k, final short v ) {
throw new UnsupportedOperationException();
}
public void clear() {
throw new UnsupportedOperationException();
}
public String toString() {
return function.toString();
}
public short remove( final char k ) {
throw new UnsupportedOperationException();
}
public short get( final char k ) {
return function.get( k );
}
public boolean containsKey( final Object ok ) {
return function.containsKey( ok );
}
}
/** Returns an unmodifiable type-specific function backed by the given type-specific function.
*
* @param f the function to be wrapped in an unmodifiable function.
* @return an unmodifiable view of the specified function.
* @see java.util.Collections#unmodifiableMap(java.util.Map) */
public static Char2ShortFunction unmodifiable( final Char2ShortFunction f ) {
return new UnmodifiableFunction( f );
}
}