de.invation.code.toval.misc.MapUtils Maven / Gradle / Ivy

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package de.invation.code.toval.misc;

import java.util.HashMap;
import java.util.Map;
import java.util.Vector;

public class MapUtils {
	
	/**
	 * String for value separation.

	 * Used for generating String representations of collections.
	 */
	public static final char VALUE_MAPPING = '=';
	
	/**
	 * String for value separation.

	 * Used for generating String representations of collections.
	 */
	public static final char VALUE_SEPARATION = ' ';
	/**
	 * Default precision used for String representations of map elements
	 * having type Float or Double.
	 */
	public static final int DEFAULT_PRECISION = 2;
	/**
	 * String representation for empty maps.
	 */
	public static final String EMPTY_MAP = "[]";
	
	public static String toString(HashMap map) {
		return toString(map, DEFAULT_PRECISION, DEFAULT_PRECISION);
	}
	
	public static String toString(HashMap map, int precision) {
		return toString(map, precision, precision);
	}
	
	public static String toString(HashMap map, int keyPrecision, int valuePrecision) {
		if(map == null)
			throw new NullPointerException();
		if(map.isEmpty())
			return EMPTY_MAP;
		Vector