/*
* Hibernate Validator, declare and validate application constraints
*
* License: Apache License, Version 2.0
* See the license.txt file in the root directory or <http://www.apache.org/licenses/LICENSE-2.0>.
*/
package org.hibernate.validator.internal.engine.messageinterpolation.util;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Utilities used for message interpolation.
*
* @author Guillaume Smet
*/
public class InterpolationHelper {
public static final char BEGIN_TERM = '{';
public static final char END_TERM = '}';
public static final char EL_DESIGNATOR = '$';
public static final char ESCAPE_CHARACTER = '\\';
private static final Pattern ESCAPE_MESSAGE_PARAMETER_PATTERN = Pattern.compile( "([\\" + ESCAPE_CHARACTER + BEGIN_TERM + END_TERM + EL_DESIGNATOR + "])" );
private InterpolationHelper() {
}
public static String escapeMessageParameter(String messageParameter) {
if ( messageParameter == null ) {
return null;
}
return ESCAPE_MESSAGE_PARAMETER_PATTERN.matcher( messageParameter ).replaceAll( Matcher.quoteReplacement( String.valueOf( ESCAPE_CHARACTER ) ) + "$1" );
}
}