package org.apache.maven.linkcheck.validation;

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache Maven" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache Maven", nor may "Apache" appear in their name, without
 *    prior written permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * ====================================================================
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import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;

/**
 * @author <a href="mailto:bwalding@apache.org">Ben Walding</a>
 * @version $Id: LinkValidatorCache.java,v 1.2 2003/02/03 14:13:54 bwalding Exp $
 */
public class LinkValidatorCache {
    private LinkValidatorManager lvm;
    private Map cache = new HashMap();

    public LinkValidatorCache(LinkValidatorManager lvm) {
        this.lvm = lvm;
    }
    public void setCachedResult(Object resourceKey, LinkValidationResult lvr) {
        cache.put(resourceKey, lvr);
    }

    /**
         * 
         * @param lvi
         * @return int Will return a status level, VALID, INVALID, UNKNOWN
         */
    public LinkValidationResult getCachedResult(LinkValidationItem lvi) {
        Iterator iter = lvm.getValidators().iterator();

        while (iter.hasNext()) {
            LinkValidator lv = (LinkValidator) iter.next();

            Object resourceKey = lv.getResourceKey(lvi);

            if (resourceKey != null) {
                return (LinkValidationResult) cache.get(resourceKey);
            }
        }
        return null;

    }

    public void load(InputStream is) {
        final LinkValidationResult LVR_VALID =
            new LinkValidationResult(LinkValidationResult.VALID, true);
        final LinkValidationResult LVR_INVALID =
            new LinkValidationResult(LinkValidationResult.INVALID, true);
        try {
            Properties p = new Properties();
            p.load(is);

            Iterator iter = p.keySet().iterator();
            while (iter.hasNext()) {
                String key = (String) iter.next();
                String value = (String) p.getProperty(key);

                if (value.equals("VALID"))
                    cache.put(key, LVR_VALID);

                if (value.equals("INVALID"))
                    cache.put(key, LVR_INVALID);

            }
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public void save(OutputStream os) {

        try {
            Properties p = new Properties();
            Iterator iter = cache.keySet().iterator();
            while (iter.hasNext()) {
                String key = (String) iter.next();
                LinkValidationResult lvr =
                    (LinkValidationResult) cache.get(key);
                if (lvr.isPersistent()) {
                    if (lvr.getStatus() == LinkValidationResult.VALID) {
                        p.setProperty(key, "VALID");
                    }

                    if (lvr.getStatus() == LinkValidationResult.INVALID) {
                        p.setProperty(key, "INVALID");
                    }
                }
            }

            p.store(os, "LinkCheck Cache");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}
