MapUtils

java.lang.Object
- org.apache.commons.exec.util.MapUtils

```
public class MapUtils
extends java.lang.Object
```
Helper classes to manipulate maps to pass substition map to the CommandLine. This class is not part of the public API and could change without warning.

Version:

$Id: MapUtils.java 1636205 2014-11-02 22:32:33Z ggregory $

Constructor Summary

Constructors
Constructor Description

MapUtils()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static <K,V> java.util.Map<K,V>`	`copy(java.util.Map<K,V> source)`	Clones a map.
`static <K,V> java.util.Map<K,V>`	`merge(java.util.Map<K,V> lhs, java.util.Map<K,V> rhs)`	Clones the lhs map and add all things from the rhs map.
`static <K,V> java.util.Map<java.lang.String,V>`	`prefix(java.util.Map<K,V> source, java.lang.String prefix)`	Clones a map and prefixes the keys in the clone, e.g.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MapUtils
```
public MapUtils()
```
- Method Detail
  - copy
```
public static <K,V> java.util.Map<K,V> copy(java.util.Map<K,V> source)
```
    Clones a map.
    
    Type Parameters:
    
    K - the map key type
    
    V - the map value type
    
    Parameters:
    
    source - the Map to clone
    
    Returns:
    
    the cloned map
  - prefix
```
public static <K,V> java.util.Map<java.lang.String,V> prefix(java.util.Map<K,V> source,
                                                                         java.lang.String prefix)
```
    Clones a map and prefixes the keys in the clone, e.g. for mapping "JAVA_HOME" to "env.JAVA_HOME" to simulate the behaviour of Ant.
    
    Type Parameters:
    
    K - the map key type
    
    V - the map value type
    
    Parameters:
    
    source - the source map
    
    prefix - the prefix used for all names
    
    Returns:
    
    the clone of the source map
  - merge
```
public static <K,V> java.util.Map<K,V> merge(java.util.Map<K,V> lhs,
                                                         java.util.Map<K,V> rhs)
```
    Clones the lhs map and add all things from the rhs map.
    
    Type Parameters:
    
    K - the map key type
    
    V - the map value type
    
    Parameters:
    
    lhs - the first map
    
    rhs - the second map
    
    Returns:
    
    the merged map