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Utility library that provides some generic data beans like pair, triple and quattro
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/**
* The MIT License
*
* Copyright (C) 2015 Asterios Raptis
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package io.github.astrapi69.collection.pair;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
/**
* The class {@link KeyValuePair} represents a key value pair with generic parameters for the key
* and value type.
*
*
* @param
* The generic type of the key
* @param
* The generic type of the value
*/
public final class KeyValuePair implements Serializable
{
/**
* The Constant serialVersionUID.
*/
private static final long serialVersionUID = 1L;
/**
* The key.
*/
private K key;
/**
* The value.
*/
private V value;
/**
* Instantiates a new key value pair.
*/
public KeyValuePair()
{
}
/**
* Instantiates a new key value pair.
*
* @param key
* the key
* @param value
* the value
*/
public KeyValuePair(final K key, final V value)
{
this.key = key;
this.value = value;
}
/**
* Builder.
*
* @param
* the key type
* @param
* the value type
* @return the key value pair builder
*/
public static KeyValuePairBuilder builder()
{
return new KeyValuePairBuilder<>();
}
/**
* Transforms the given {@link Map} to a list of {@link KeyValuePair}'s.
*
* @param
* The generic type of the key
* @param
* The generic type of the value
* @param map
* the map
* @return the new list with the {@link KeyValuePair}'s.
*/
public static List> toKeyValuePairs(final Map map)
{
final List> list = new ArrayList<>();
for (final Entry entry : map.entrySet())
{
list.add(
KeyValuePair. builder().key(entry.getKey()).value(entry.getValue()).build());
}
return list;
}
/**
* Transforms the given {@link Properties} to a list of {@link KeyValuePair}'s.
*
* @param properties
* the properties
* @return the new list with the {@link KeyValuePair}'s.
*/
public static List> toKeyValuePairs(final Properties properties)
{
final List> list = new ArrayList<>();
for (final Entry entry : properties.entrySet())
{
list.add(KeyValuePair. builder().key((String)entry.getKey())
.value((String)entry.getValue()).build());
}
return list;
}
/**
* Transforms the given {@link List} of {@link KeyValuePair}'s to a {@link Map}.
*
* @param
* The generic type of the key
* @param
* The generic type of the value
* @param list
* the list
* @return the new map.
*/
public static Map toMap(final Collection> list)
{
final Map map = new HashMap<>();
for (KeyValuePair keyValuePair : list)
{
map.put(keyValuePair.getKey(), keyValuePair.getValue());
}
return map;
}
/**
* {@inheritDoc}
*/
@Override
public boolean equals(final Object o)
{
if (o == this)
{
return true;
}
if (!(o instanceof KeyValuePair))
{
return false;
}
final KeyValuePair other = (KeyValuePair)o;
final Object this$key = this.getKey();
final Object other$key = other.getKey();
if (this$key == null ? other$key != null : !this$key.equals(other$key))
{
return false;
}
final Object this$value = this.getValue();
final Object other$value = other.getValue();
if (this$value == null ? other$value != null : !this$value.equals(other$value))
{
return false;
}
return true;
}
/**
* The key.
*
* @return the key
*/
public K getKey()
{
return this.key;
}
/**
* The key.
*
* @param key
* the new key
*/
public void setKey(final K key)
{
this.key = key;
}
/**
* The value.
*
* @return the value
*/
public V getValue()
{
return this.value;
}
/**
* The value.
*
* @param value
* the new value
*/
public void setValue(final V value)
{
this.value = value;
}
/**
* {@inheritDoc}
*/
@Override
public int hashCode()
{
final int PRIME = 59;
int result = 1;
final Object $key = this.getKey();
result = result * PRIME + ($key == null ? 43 : $key.hashCode());
final Object $value = this.getValue();
result = result * PRIME + ($value == null ? 43 : $value.hashCode());
return result;
}
/**
* To builder.
*
* @return the key value pair builder
*/
public KeyValuePairBuilder toBuilder()
{
return new KeyValuePairBuilder().key(this.key).value(this.value);
}
/**
* {@inheritDoc}
*/
@Override
public String toString()
{
return "KeyValuePair(key=" + this.getKey() + ", value=" + this.getValue() + ")";
}
/**
* The class {@link KeyValuePairBuilder}.
*
* @param
* the key type
* @param
* the value type
*/
public static class KeyValuePairBuilder
{
/** The key. */
private K key;
/** The value. */
private V value;
/**
* Instantiates a new key value pair builder.
*/
KeyValuePairBuilder()
{
}
/**
* Build it
*
* @return the key value pair
*/
public KeyValuePair build()
{
return new KeyValuePair<>(key, value);
}
/**
* The key.
*
* @param key
* the key
* @return the key value pair builder
*/
public KeyValuePairBuilder key(final K key)
{
this.key = key;
return this;
}
/**
* {@inheritDoc}
*/
@Override
public String toString()
{
return "KeyValuePair.KeyValuePairBuilder(key=" + this.key + ", value=" + this.value
+ ")";
}
/**
* The value.
*
* @param value
* the value
* @return the key value pair builder
*/
public KeyValuePairBuilder value(final V value)
{
this.value = value;
return this;
}
}
}