org.apache.commons.digester3.substitution
Class MultiVariableExpander

java.lang.Object
  org.apache.commons.digester3.substitution.MultiVariableExpander

All Implemented Interfaces:

VariableExpander

public class MultiVariableExpander
extends Object
implements VariableExpander

Expands variable references from multiple sources.

Since:

1.6

Constructor Summary

MultiVariableExpander()

Method Summary

void	addSource(String marker, Map<String,Object> source) Add a new variables source, identified by the input marker
String	expand(String param) Return the input string with any variables replaced by their corresponding value.
String	expand(String str, String marker, Map<String,Object> source) Replace any occurrences within the string of the form "marker{key}" with the value from source[key].

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MultiVariableExpander

public MultiVariableExpander()

Method Detail

addSource

public void addSource(String marker,
                      Map<String,Object> source)

Add a new variables source, identified by the input marker

Parameters:

marker - The input variables marker

source - The variables source

expand

public String expand(String param)

Return the input string with any variables replaced by their corresponding value. If there are no variables in the string, then the input parameter is returned unaltered.

Specified by:

expand in interface VariableExpander

Parameters:

param - the string containing variables to be replaced.

Returns:

the input string with any variables replaced by their corresponding value.

expand

public String expand(String str,
                     String marker,
                     Map<String,Object> source)

Replace any occurrences within the string of the form "marker{key}" with the value from source[key].

Commonly, the variable marker is "$", in which case variables are indicated by ${key} in the string.

Returns the string after performing all substitutions.

If no substitutions were made, the input string object is returned (not a copy).

Parameters:

str - The input string containing placeholders

marker - The input variables marker

source - The variables source

Returns:

The input string where variables have been expanded by replacing values found in source