SessionsProcessor.java

/*******************************************************************************
 * Copyright (c) 2004 Red Hat, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Keith Seitz <keiths@redhat.com> - initial API and implementation
 *******************************************************************************/
package org.eclipse.linuxtools.internal.oprofile.core.opxml.sessions;

import java.util.ArrayList;

import org.eclipse.linuxtools.internal.oprofile.core.model.OpModelEvent;
import org.eclipse.linuxtools.internal.oprofile.core.model.OpModelSession;
import org.eclipse.linuxtools.internal.oprofile.core.opxml.XMLProcessor;
import org.xml.sax.Attributes;


/**
 * A processor for sessions.
 * @see org.eclipse.linuxtools.internal.oprofile.core.opxml.OpxmlRunner
 */
public class SessionsProcessor extends XMLProcessor {
    public static class SessionInfo {
        /**
         *  A list of Session as well as Events under each of them
         */
        public ArrayList<OpModelSession> list;

        public SessionInfo(ArrayList<OpModelSession> session){
            this.list = session;
        }
    }

    // XML tags recognized by this processor
    public static final String SESSION_TAG = "session"; //$NON-NLS-1$
    private static final String SESSION_NAME_ATTR = "name"; //$NON-NLS-1$
    public static final String SAMPLE_COUNT_TAG = "count"; //$NON-NLS-1$
    public static final String EVENT_TAG = "event"; //$NON-NLS-1$
    private static final String EVENT_NAME_ATTR = "name"; //$NON-NLS-1$

    /**
     *  The current session being constructed
     */
    private OpModelSession currentSession;

    /**
     *  The current event being constructed
     */
    private OpModelEvent currentEvent;

    /**
     *  A list of all sessions
     */
    private ArrayList<OpModelEvent> eventList;

    @Override
    public void startElement(String name, Attributes attrs, Object callData) {
        if (name.equals(SESSION_TAG)) {
            String sessionName = validString(attrs.getValue(SESSION_NAME_ATTR));
            currentSession = new OpModelSession(sessionName);
            eventList = new ArrayList<>();
        } else if (name.equals(EVENT_TAG)) {
            String eventName = attrs.getValue(EVENT_NAME_ATTR);
            currentEvent = new OpModelEvent(currentSession,eventName);
        } else {
            super.startElement(name, attrs, callData);
        }
    }

    @Override
    public void endElement(String name, Object callData) {
        if (name.equals(SESSION_TAG)) {
            // Got end of session -- save in session list
            OpModelEvent[] s = new OpModelEvent[eventList.size()];
            eventList.toArray(s);
            currentSession.setEvents(s);
            SessionInfo info = (SessionInfo) callData;
            info.list.add(currentSession);
            currentSession = null;
            eventList = null;
        } else if (name.equals(EVENT_TAG)) {
            // Got end of event -- save session list into current OpModelEvent and
            // save current event into call data
            eventList.add(currentEvent);
            currentEvent = null;
        } else {
            super.endElement(name, callData);
        }
    }
}