Java Map Put putAllTransposed( Map> source_key_valueSet, Map output_value_key)

Description

Takes a Map that goes from Object to Set, and fills in the transpose

License

Open Source License

Parameter

Parameter	Description
source_key_valueSet	a parameter
output_value_key	a parameter

Declaration

public static void putAllTransposed(
        Map<Object, Set<Object>> source_key_valueSet,
        Map<Object, Object> output_value_key) 

Method Source Code

//package com.java2s;

import java.util.Iterator;

import java.util.Map;

import java.util.Set;

public class Main {
    /**/*w w  w .j a v  a  2  s .  co  m*/
     * Takes a Map that goes from Object to Set, and fills in the transpose
     *
     * @param source_key_valueSet
     * @param output_value_key
     */
    public static void putAllTransposed(
            Map<Object, Set<Object>> source_key_valueSet,
            Map<Object, Object> output_value_key) {
        for (Iterator<Object> it = source_key_valueSet.keySet().iterator(); it
                .hasNext();) {
            Object key = it.next();
            Set<Object> values = source_key_valueSet.get(key);
            for (Iterator<Object> it2 = values.iterator(); it2.hasNext();) {
                Object value = it2.next();
                output_value_key.put(value, key);
            }
        }
    }

    /**
     * Type-safe get
     * @param map
     * @param key
     * @return value
     */
    public static <K, V, M extends Map<K, V>> V get(M map, K key) {
        return map.get(key);
    }
}

Related

1. putAllIfNotNull(final Map map, final Map m)
2. putAllNewInMap(Map original, Map newStuff)
3. putAllNonNullValues(Map source, Map target)
4. putAllObjects(Map targetMap, Map sourceMap)
5. putAllRecursively(Map destination, Map source)
6. putAsCollection(K key, V value, Map map)
7. putAsStringIfNotNull(Map properties, String key, Object value)
8. putAt(LinkedHashMap map, K key, V value, int pos)
9. putBoolean(Map properties, Object key, boolean value)