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XWork is an command-pattern framework that is used to power WebWork as well as other applications. XWork provides an Inversion of Control container, a powerful expression language, data type conversion, validation, and pluggable configuration.

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/*
 * Copyright (c) 2002-2006 by OpenSymphony
 * All rights reserved.
 */
package com.opensymphony.xwork2.config.impl;

import com.opensymphony.xwork2.util.PatternMatcher;

import java.util.Map;
import java.util.Set;

/**
 * Matches namespace strings against a wildcard pattern matcher
 *
 * @Since 2.1
 */
public class NamespaceMatcher extends AbstractMatcher {
     public NamespaceMatcher(PatternMatcher patternMatcher,
            Set namespaces) {
        super(patternMatcher);
        for (String name : namespaces) {
            if (!patternMatcher.isLiteral(name)) {
                addPattern(name, new NamespaceMatch(name, null), false);
            }
        }
    }

    @Override
    protected NamespaceMatch convert(String path, NamespaceMatch orig, Map vars) {
        /*Map origVars = (Map)vars;
        Map map = new HashMap();
        for (Map.Entry entry : origVars.entrySet()) {
            if (entry.getKey().length() == 1) {
                map.put("ns"+entry.getKey(), entry.getValue());
            }
        }
        */
        return new NamespaceMatch(orig.getPattern(), vars);
    }
}