Example usage for org.apache.commons.collections15.bidimap DualHashBidiMap DualHashBidiMap

Introduction

In this page you can find the example usage for org.apache.commons.collections15.bidimap DualHashBidiMap DualHashBidiMap.

Prototype

public DualHashBidiMap(Map<? extends K, ? extends V> map) 

Source Link

Document

Constructs a HashBidiMap and copies the mappings from specified Map.

Usage

From source file:edu.utah.further.core.util.context.EnumAliasService.java

/**
 * Return the enum aliases map./* w w  w  .ja v  a  2s .com*/
 *
 * @return the enum aliases map
 */
public BidiMap<String, Class<? extends Enum<?>>> getEnumAliases() {
    // using the double-checked locking with volatile
    // @see http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html
    if (enumAliases == null) {
        synchronized (this) {
            if (enumAliases == null) {
                enumAliases = initializeEnumAliases();
            }
        }
    }
    // Defensive copy. TODO: move to CollectionUtil as a generic factory method
    return new DualHashBidiMap<>(enumAliases);
}

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