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/*
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.util;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.Map;
// @ThreadSafe
public class MapUtils extends org.apache.commons.collections.MapUtils
{
/**
* Convenience method for CollectionUtil#mapWithKeysAndValues(Class, Iterator,
* Iterator); keys and values can be null or empty.
*/
public static Map mapWithKeysAndValues(Class mapClass,
K[] keys,
V[] values)
{
Collection keyCollection = (keys != null ? Arrays.asList(keys) : Collections.EMPTY_LIST);
Collection valuesCollection = (values != null ? Arrays.asList(values) : Collections.EMPTY_LIST);
return mapWithKeysAndValues(mapClass, keyCollection.iterator(), valuesCollection.iterator());
}
/**
* Convenience method for CollectionUtil#mapWithKeysAndValues(Class, Iterator,
* Iterator); keys and values can be null or empty.
*/
public static Map mapWithKeysAndValues(Class mapClass,
Collection keys,
Collection values)
{
keys = (keys != null ? keys : Collections.EMPTY_LIST);
values = (values != null ? values : Collections.EMPTY_LIST);
return mapWithKeysAndValues(mapClass, keys.iterator(), values.iterator());
}
/**
* Create & populate a Map of arbitrary class. Populating stops when either the
* keys or values iterator is null or exhausted.
*
* @param mapClass the Class of the Map to instantiate
* @param keys iterator for Objects ued as keys
* @param values iterator for Objects used as values
* @return the instantiated Map
*/
public static Map mapWithKeysAndValues(Class mapClass,
Iterator keys,
Iterator values)
{
Map m = null;
if (mapClass == null)
{
throw new IllegalArgumentException("Map class must not be null!");
}
try
{
m = mapClass.newInstance();
}
catch (Exception ex)
{
throw new RuntimeException(ex);
}
if (keys != null && values != null)
{
while (keys.hasNext() && values.hasNext())
{
m.put(keys.next(), values.next());
}
}
return m;
}
/**
* Creates a String representation of the given Map, with optional newlines
* between elements.
*
* @param props the map to format
* @param newline indicates whether elements are to be split across lines
* @return the formatted String
*/
public static String toString(Map props, boolean newline)
{
if (props == null || props.isEmpty())
{
return "{}";
}
StringBuilder buf = new StringBuilder(props.size() * 32);
buf.append('{');
if (newline)
{
buf.append(SystemUtils.LINE_SEPARATOR);
}
Object[] entries = props.entrySet().toArray();
int i;
for (i = 0; i < entries.length - 1; i++)
{
Map.Entry property = (Map.Entry) entries[i];
buf.append(property.getKey());
buf.append('=');
buf.append(PropertiesUtils.maskedPropertyValue(property));
if (newline)
{
buf.append(SystemUtils.LINE_SEPARATOR);
}
else
{
buf.append(',').append(' ');
}
}
// don't forget the last one
Map.Entry lastProperty = (Map.Entry) entries[i];
buf.append(lastProperty.getKey().toString());
buf.append('=');
buf.append(PropertiesUtils.maskedPropertyValue(lastProperty));
if (newline)
{
buf.append(SystemUtils.LINE_SEPARATOR);
}
buf.append('}');
return buf.toString();
}
}