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 * CruiseControl, a Continuous Integration Toolkit
 * Copyright (c) 2001, ThoughtWorks, Inc.
 * 200 E. Randolph, 25th Floor
 * Chicago, IL 60601 USA
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
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 *     + Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
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 *     + Redistributions in binary form must reproduce the above
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 *       with the distribution.
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 *       names of its contributors may be used to endorse or promote
 *       products derived from this software without specific prior
 *       written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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package net.sourceforge.cruisecontrol.publishers.email;

import java.util.Properties;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import net.sourceforge.cruisecontrol.CruiseControlException;
import net.sourceforge.cruisecontrol.util.ValidationHelper;

public class PropertiesMapper extends EmailAddressMapper {

    private String file = null;
    private final Properties props = new Properties();

    public PropertiesMapper() {
        super();
    }

    public void setFile(String file) {
        this.file = file;
    }

    public String getFile() {
        return file;
    }

    public void validate() throws CruiseControlException {
        ValidationHelper.assertIsSet(file, "file", getClass());
        ValidationHelper.assertFalse(file.equals(""), "empty string is not a valid value of file for "
                + getClass().getName());
        File f = new File(file);
        ValidationHelper.assertExists(f, "file", getClass());
        ValidationHelper.assertIsReadable(f, "file", getClass());
        // this check could also be moved to ValidationHelper
        if (!f.isFile()) {
            throw new CruiseControlException(file + " is not a file");
        }
    }

    /*
     * @see net.sourceforge.cruisecontrol.publishers.EmailAddressMapper#open()
     */
    public void open() throws CruiseControlException {
        File f = new File(getFile());

        try {
            props.load(new BufferedInputStream(new FileInputStream(f)));
        } catch (IOException ie) {
            throw new CruiseControlException(ie);
        }
    }

    public void close() {
        props.clear();
    }

    public String mapUser(String user) {
        return props.getProperty(user);
    }
}