mangotiger.bus.Event.java Source code

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Here is the source code for mangotiger.bus.Event.java

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/*
 * $Source: $
 *
 * Copyright (C) 2002-2005, Thomas Robert Gagnier, Jr., All Rights Reserved.
 * Unauthorized use, disclosure or reproduction of this source code is strictly
 * prohibited by United States copyright law and international treaty provisions.
 * Use of source code requires an appropriate source license.
 */
package mangotiger.bus;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import java.util.TreeMap;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/** @author Tom Gagnier */
public class Event implements Comparable {

    private final String name;
    private final Map<String, String> attributes = new TreeMap<String, String>();

    public Event(final String name) {
        if (name == null)
            throw new IllegalArgumentException("null name");
        this.name = name;
    }

    public Event(final String name, final Map<String, String>... attributes) {
        this(name);
        for (Map<String, String> attributeMap : attributes) {
            this.attributes.putAll(attributeMap);
        }
    }

    /**
     * A new event.
     * @param name       the event name
     * @param attributes attribute name value pairs separated by spaces.
     */
    public Event(final String name, final String attributes) {
        this(name, attributes.split(" +"));
    }

    public Event(final String name, final String... attributeNameValuePairs) {
        this(name);
        for (int i = 1; i < attributeNameValuePairs.length; i += 2) {
            attributes.put(attributeNameValuePairs[i - 1], attributeNameValuePairs[i]);
        }
    }

    public String name() {
        return name;
    }

    public String get(final String attributeName) {
        final String value = attributes.get(attributeName);
        return value == null ? "" : value;
    }

    public Date asDate(final String attributeName) {
        try {
            final SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd - HH:mm:ss");
            final String date = get(attributeName);
            return format.parse(date);
        } catch (ParseException e) {
            unableToParse(attributeName, e);
            return new Date(0);
        }
    }

    public int asInt(final String attributeName) {
        try {
            return Integer.parseInt(get(attributeName));
        } catch (NumberFormatException e) {
            unableToParse(attributeName, e);
            return 0;
        }
    }

    public int asAmount(final String attributeName) {
        try {
            final String amount = get(attributeName).replaceAll("\\.", "");
            return Integer.parseInt(amount);
        } catch (NumberFormatException e) {
            unableToParse(attributeName, e);
            return 0;
        }
    }

    private void unableToParse(final String attributeName, final Exception e) {
        log().error("unable to parse " + name + '.' + attributeName + '=' + get(attributeName), e);
    }

    @Override
    public boolean equals(final Object o) {
        if (this == o)
            return true;
        if (o == null || getClass() != o.getClass())
            return false;
        final Event that = (Event) o;
        return name.equals(that.name) && attributes.equals(that.attributes);
    }

    @Override
    public int hashCode() {
        return 29 * name.hashCode() + attributes.hashCode();
    }

    public int compareTo(final Object o) {
        final Event that = (Event) o;
        return toString().compareTo(that.toString());
    }

    @Override
    public String toString() {
        return "Event{" + name + attributes + '}';
    }

    private static Log log() {
        return LogFactory.getLog(Event.class);
    }
}