com.feilong.lib.xstream.security.RegExpTypePermission Maven / Gradle / Ivy

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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.

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/*
 * Copyright (C) 2014 XStream Committers.
 * All rights reserved.
 *
 * Created on 09. January 2014 by Joerg Schaible
 */
package com.feilong.lib.xstream.security;

import java.util.regex.Pattern;

/**
 * Permission for any type with a name matching one of the provided regular expressions.
 * 
 * @author Jörg Schaible
 * @since 1.4.7
 */
public class RegExpTypePermission implements TypePermission{

    private final Pattern[] patterns;

    public RegExpTypePermission(final String[] patterns){
        this(getPatterns(patterns));
    }

    public RegExpTypePermission(final Pattern[] patterns){
        this.patterns = patterns == null ? new Pattern[0] : patterns;
    }

    @Override
    public boolean allows(final Class type){
        if (type != null){
            final String name = type.getName();
            for (Pattern pattern : patterns){
                if (pattern.matcher(name).matches()){
                    return true;
                }
            }
        }
        return false;
    }

    private static Pattern[] getPatterns(final String[] patterns){
        if (patterns == null){
            return null;
        }
        final Pattern[] array = new Pattern[patterns.length];
        for (int i = 0; i < array.length; ++i){
            array[i] = Pattern.compile(patterns[i]);
        }
        return array;
    }
}