WmiMgrOperation.java

/*******************************************************************************
 * This file is part of OpenNMS(R).
 *
 * Copyright (C) 2009-2011 The OpenNMS Group, Inc.
 * OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 *
 * OpenNMS(R) is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenNMS(R).  If not, see:
 *      http://www.gnu.org/licenses/
 *
 * For more information contact:
 *     OpenNMS(R) Licensing <license@opennms.org>
 *     http://www.opennms.org/
 *     http://www.opennms.com/
 *******************************************************************************/

package org.opennms.protocols.wmi;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * <p>WmiMgrOperation class.</p>
 *
 * @author ranger
 * @version $Id: $
 */
public enum WmiMgrOperation {
	EQ(0),
	NEQ(1),
	GT(2),
	LT(3);

	private int m_OperationType;

	WmiMgrOperation(final int opType) {
		m_OperationType = opType;
	}

	/**
	 * <p>getOpNumber</p>
	 *
	 * @return a int.
	 */
	public int getOpNumber() {
		return (m_OperationType);
	}

	/**
	 * <p>compareString</p>
	 *
	 * @param comp1 a {@link java.lang.Object} object.
	 * @param comp2 a {@link java.lang.String} object.
	 * @return a boolean.
	 * @throws org.opennms.protocols.wmi.WmiException if any.
	 */
	public boolean compareString(final Object comp1, final String comp2)
			throws WmiException {
		if (comp1 instanceof String) {

			try {
			    final DateFormat fmt2 = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
				final Date date1 = WmiClient.convertWmiDate((String) comp1);
				final Date date2 = fmt2.parse(comp2);

				return compareToDate(date1, date2);
			} catch (ParseException e) {
				// ignore this exception and continue with string comparison.
			}
			return compareToString((String) comp1, comp2);
		} else if (comp1 instanceof Integer) {
		    final Integer compInt1 = (Integer) comp1;
			final Integer compInt2 = Integer.parseInt(comp2);

			return compareToInteger(compInt1, compInt2);
		} else if (comp1 instanceof Boolean) {
		    final Boolean bool1 = (Boolean) comp1;
			final Boolean bool2 = Boolean.parseBoolean(comp2);

			return compareToBoolean(bool1, bool2);
		} else if (comp1 instanceof Float) {
		    final Float fl1 = (Float) comp1;
			final Float fl2 = Float.parseFloat(comp2);

			return compareToFloat(fl1, fl2);
		} else if (comp1 instanceof Date) {
		    final DateFormat fmt = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
			final Date date1 = (Date) comp1;
			Date date2;
			try {
				date2 = fmt.parse(comp2);
			} catch (ParseException e) {
				throw new WmiException("Parsing date '" + comp2 + "' failed: " + e.getMessage(), e);
			}

			return compareToDate(date1, date2);

		}

		// No root type found. Return false. Maybe instead we should throw an exception.
		// A potential bug to fix?
		// TODO maybe throwing an exception would be more useful?
		return false;
	}

	private boolean compareToString(final String comp1, final String comp2) {
		switch (this) {
		case EQ:
			return (comp2.equals(comp1));
		case NEQ:
			return !(comp2.equals(comp1));
		case GT:
			return (comp2.length() < ((String) comp1).length());
		case LT:
			return (comp2.length() > ((String) comp1).length());
		}

		// catch-all
		// TODO maybe throwing an exception would be more useful?
		return false;
	}

	private boolean compareToInteger(final Integer comp1, final Integer comp2) {
		switch (this) {
		case EQ:
			if (comp2.compareTo(comp1) == 0) {
				return true;
			} else {
				return false;
			}
		case NEQ:
			if (comp2.compareTo(comp1) != 0) {
				return true;
			} else {
				return false;
			}
		case GT:
			if (comp2.compareTo(comp1) < 0) {
				return true;
			} else {
				return false;
			}
		case LT:
			if (comp2.compareTo(comp1) > 0) {
				return true;
			} else {
				return false;
			}
		}

		// catch all
		// TODO maybe throwing an exception would be more useful?
		return false;
	}

	private boolean compareToBoolean(final Boolean bool1, final Boolean bool2) {
		switch (this) {
		case EQ:
			return bool1.equals(bool2);
		case NEQ:
		case GT:
		case LT:
			return !(bool1.equals(bool2));
		}
		
		// TODO maybe throwing an exception would be more useful?
		return false;
	}

	private boolean compareToFloat(final Float comp1, final Float comp2) {
		switch (this) {
		case EQ:
			if (comp2.compareTo(comp1) == 0) {
				return true;
			} else {
				return false;
			}
		case NEQ:
			if (comp2.compareTo(comp1) != 0) {
				return true;
			} else {
				return false;
			}
		case GT:
			if (comp2.compareTo(comp1) < 0) {
				return true;
			} else {
				return false;
			}
		case LT:
			if (comp2.compareTo(comp1) > 0) {
				return true;
			} else {
				return false;
			}
		}

		// catch all
		// TODO maybe throwing an exception would be more useful?
		return false;
	}

	private boolean compareToDate(final Date date1, final Date date2) {
		switch (this) {
		case EQ:
			if (date1.equals(date2)) {
				return true;
			}
		case NEQ:
			if (!(date1.equals(date2))) {
				return true;
			}
		case GT:
			if (date1.after(date2)) {
				return true;
			}
		case LT:
			if (date1.before(date2)) {
				return true;
			}
		}

		// catch-all
		// TODO maybe throwing an exception would be more useful?
		return false;
	}
}