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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
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 */

// Portions Copyright [2016] [Payara Foundation and/or its affiliates]

package com.sun.gjc.util;

import java.util.Comparator;

/**
 * Store the sql queries executed by applications along with the number of
 * times executed and the time stamp of the last usage.
 * Used for monitoring information.
 * 
 * @author Shalini M
 */
public class SQLTrace {

    private String queryName;
    private int numExecutions;
    private long lastUsageTime;

    public SQLTrace(String query, int numExecutions, long time) {
        this.queryName = query;
        this.numExecutions = numExecutions;
        this.lastUsageTime = time;
    }
    
    /**
     * Get the value of queryName
     *
     * @return the value of queryName
     */
    public String getQueryName() {
        return queryName;
    }

    /**
     * Set the value of queryName
     *
     * @param queryName new value of queryName
     */
    public void setQueryName(String queryName) {
        this.queryName = queryName;
    }

    /**
     * Get the value of numExecutions
     *
     * @return the value of numExecutions
     */
    public int getNumExecutions() {
        return numExecutions;
    }

    /**
     * Set the value of numExecutions
     *
     * @param numExecutions new value of numExecutions
     */
    public void setNumExecutions(int numExecutions) {
        this.numExecutions = numExecutions;
    }

    /**
     * Get the value of lastUsageTime
     *
     * @return the value of lastUsageTime
     */
    public long getLastUsageTime() {
        return lastUsageTime;
    }

    /**
     * Set the value of lastUsageTime
     *
     * @param lastUsageTime new value of lastUsageTime
     */
    public void setLastUsageTime(long lastUsageTime) {
        this.lastUsageTime = lastUsageTime;
    }
    
    // Comparator that orders based upon the number of executions and the last usage time.
    public static Comparator SQLTraceFrequencyComparator = new Comparator() {
        
        @Override
        public int compare(SQLTrace sqlTrace1, SQLTrace sqlTrace2) {
            final int sqlTrace1Frequency = sqlTrace1.getNumExecutions();
            final int sqlTrace2Frequency = sqlTrace2.getNumExecutions();
            
            // Initialise the comparison variable to be equal
            int compare = 0;
            
            // Compare the number of executions
            if (sqlTrace1Frequency < sqlTrace2Frequency) {
                compare = 1;
            } else if (sqlTrace1Frequency > sqlTrace2Frequency) {
                compare = -1;
            }
            
            // If the number of executions are the same, compare the last usage time
            if (compare == 0) {
                final long sqlTrace1LastUsageTime = sqlTrace1.getLastUsageTime();
                final long sqlTrace2LastUsageTime = sqlTrace2.getLastUsageTime();
                
                if (sqlTrace1LastUsageTime < sqlTrace2LastUsageTime) {
                    compare = 1;
                } else if (sqlTrace1LastUsageTime > sqlTrace2LastUsageTime) {
                    compare = -1;
                }
            }
            
            return compare;
        }
    };
}