/*
 * Copyright (c) 2010 by Intevation GmbH
 *
 * This program is free software under the LGPL (>=v2.1)
 * Read the file LGPL.txt coming with the software for details
 * or visit http://www.gnu.org/licenses/ if it does not exist.
 */

package de.intevation.gnv.action.sessionmodel;

import java.text.NumberFormat;

import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

/**
 * Stores key-value pairs used to save user input for changing diagram
 * attributes.
 *
 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
 */
public class DiagrammOptions {

    private Map<String, Object> values = new HashMap<String, Object>();

    /**
     * Constructor
     */
    public DiagrammOptions() {
        super();
    }

    /**
     * Returns the Value to a given Key
     * @param  key The key of the value that should be returned.
     * @return the value.
     */
    public Object getValue(String key) {
        return this.values.get(key);
    }


    /**
     * Returns the value as string.
     * @param key The key of the value that should be returned.
     * @param locale A locale object used to format numbers.
     * @return the value as string.
     */
    public String getValue(String key, Locale locale) {
        Object obj = values.get(key);

        if (obj instanceof Double && locale != null) {
            Double value        = (Double) obj;
            NumberFormat format = NumberFormat.getNumberInstance(locale);

            return format.format(value);
        }

        return (String) obj;
    }

    /**
     * Set a value with the given key.
     *
     * @param key The given key.
     * @param value The value to be stored.
     */
    public void setValue(String key, Object value) {
        values.put(key, value);
    }
}
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