org.codehaus.plexus.interpolation.util
Class ValueSourceUtils

java.lang.Object
  org.codehaus.plexus.interpolation.util.ValueSourceUtils

public final class ValueSourceUtils
extends java.lang.Object

Utility methods shared by multiple ValueSource implementations.

Version:

$Id: ValueSourceUtils.java 7529 2008-07-20 20:24:21Z olamy $

Author:

jdcasey

Method Summary

static java.lang.String

trimPrefix(java.lang.String expression, java.util.Collection possiblePrefixes, boolean allowUnprefixedExpressions) If the expression starts with one of the provided prefixes, trim that prefix and return the remaining expression.

Methods inherited from class java.lang.Object

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

Method Detail

trimPrefix

public static java.lang.String trimPrefix(java.lang.String expression,
                                          java.util.Collection possiblePrefixes,
                                          boolean allowUnprefixedExpressions)

If the expression starts with one of the provided prefixes, trim that prefix and return the remaining expression. If it doesn't start with a provided prefix, and the allowUnprefixedExpressions flag is true, then return the expression unchanged; if the flag is false, return null. Finally, if the original expression is null, return null without attempting to process it.

Parameters:

expression - The expression to trim

possiblePrefixes - The list of possible expression prefixes to trim

allowUnprefixedExpressions - Whether to return the expression if it doesn't start with one of the prefixes. If true, simply return the original expression; if false, return null.

Returns:

The trimmed expression, or null. See the behavior of allowUnprefixedExpressions in this method for more detail.