96 lines
2.7 KiB
Java
96 lines
2.7 KiB
Java
package Common.Utils;
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import java.io.Serializable;
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public class Pair<K, V> implements Serializable {
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/**
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* Key of this <code>Pair</code>.
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*/
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private K key;
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/**
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* Value of this this <code>Pair</code>.
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*/
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private V value;
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/**
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* Creates a new pair
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*
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* @param key The key for this pair
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* @param value The value to use for this pair
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*/
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public Pair(K key, V value) {
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this.key = key;
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this.value = value;
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}
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/**
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* Gets the key for this pair.
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*
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* @return key for this pair
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*/
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public K getKey() {
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return key;
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}
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/**
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* Gets the value for this pair.
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*
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* @return value for this pair
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*/
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public V getValue() {
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return value;
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}
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/**
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* <p><code>String</code> representation of this
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* <code>Pair</code>.</p>
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*
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* <p>The default name/value delimiter '=' is always used.</p>
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*
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* @return <code>String</code> representation of this <code>Pair</code>
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*/
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@Override
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public String toString() {
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return key + "=" + value;
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}
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/**
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* <p>Generate a hash code for this <code>Pair</code>.</p>
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*
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* <p>The hash code is calculated using both the name and
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* the value of the <code>Pair</code>.</p>
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*
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* @return hash code for this <code>Pair</code>
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*/
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@Override
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public int hashCode() {
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// name's hashCode is multiplied by an arbitrary prime number (13)
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// in order to make sure there is a difference in the hashCode between
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// these two parameters:
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// name: a value: aa
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// name: aa value: a
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return key.hashCode() * 13 + (value == null ? 0 : value.hashCode());
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}
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/**
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* <p>Test this <code>Pair</code> for equality with another
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* <code>Object</code>.</p>
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*
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* <p>If the <code>Object</code> to be tested is not a
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* <code>Pair</code> or is <code>null</code>, then this method
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* returns <code>false</code>.</p>
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*
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* <p>Two <code>Pair</code>s are considered equal if and only if
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* both the names and values are equal.</p>
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*
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* @param o the <code>Object</code> to test for
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* equality with this <code>Pair</code>
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* @return <code>true</code> if the given <code>Object</code> is
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* equal to this <code>Pair</code> else <code>false</code>
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*/
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (o instanceof Pair) {
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Pair pair = (Pair) o;
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if (key != null ? !key.equals(pair.key) : pair.key != null) return false;
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if (value != null ? !value.equals(pair.value) : pair.value != null) return false;
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return true;
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}
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return false;
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}
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}
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