/*
The MIT License
Copyright (c) 2004-2014 Paul R. Holser, Jr.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package joptsimple.util;
import java.text.MessageFormat;
import java.util.ResourceBundle;
import java.util.regex.Pattern;
import static java.util.regex.Pattern.*;
import joptsimple.ValueConversionException;
import joptsimple.ValueConverter;
/**
* Ensures that values entirely match a regular expression.
*
* @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a>
*/
public class RegexMatcher implements ValueConverter<String> {
private final Pattern pattern;
/**
* Creates a matcher that uses the given regular expression, modified by the given flags.
*
* @param pattern the regular expression pattern
* @param flags modifying regex flags
* @throws IllegalArgumentException if bit values other than those corresponding to the defined match flags are
* set in {@code flags}
* @throws java.util.regex.PatternSyntaxException if the expression's syntax is invalid
*/
public RegexMatcher( String pattern, int flags ) {
this.pattern = compile( pattern, flags );
}
/**
* Gives a matcher that uses the given regular expression.
*
* @param pattern the regular expression pattern
* @return the new converter
* @throws java.util.regex.PatternSyntaxException if the expression's syntax is invalid
*/
public static ValueConverter<String> regex( String pattern ) {
return new RegexMatcher( pattern, 0 );
}
public String convert( String value ) {
if ( !pattern.matcher( value ).matches() ) {
raiseValueConversionFailure( value );
}
return value;
}
public Class<String> valueType() {
return String.class;
}
public String valuePattern() {
return pattern.pattern();
}
private void raiseValueConversionFailure( String value ) {
ResourceBundle bundle = ResourceBundle.getBundle( "joptsimple.ExceptionMessages" );
String template = bundle.getString( getClass().getName() + ".message" );
String message = new MessageFormat( template ).format( new Object[] { value, pattern.pattern() } );
throw new ValueConversionException( message );
}
}