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CCTResultsFilter.java

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package org.netbeans.lib.profiler.results.cpu.cct;

import java.util.Collection;
import org.netbeans.lib.profiler.results.cpu.cct.nodes.MarkedCPUCCTNode;
import org.netbeans.lib.profiler.results.cpu.cct.nodes.ThreadCPUCCTNode;
import org.netbeans.lib.profiler.marker.Mark;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import java.util.Stack;
import java.util.logging.Level;
import java.util.logging.Logger;


/**
 *
 * @author Jaroslav Bachorik
 */
00062 public final class CCTResultsFilter extends CPUCCTVisitorAdapter {
    //~ Inner Interfaces ---------------------------------------------------------------------------------------------------------

    public static interface Evaluator {
        //~ Methods --------------------------------------------------------------------------------------------------------------

        boolean evaluate(Mark mark);
    }
    
    public static interface EvaluatorProvider {
        Set/*<Evaluator>*/ getEvaluators();
    }

    //~ Static fields/initializers -----------------------------------------------------------------------------------------------

    private static final Logger LOGGER = Logger.getLogger(CCTResultsFilter.class.getName());

    //~ Instance fields ----------------------------------------------------------------------------------------------------------

    private Set /*<Evaluator>*/ evaluators = null;
    private Set evaluatorProviders = new HashSet();

    private Stack passFlagStack;
    private boolean passingFilter;

    //~ Constructors -------------------------------------------------------------------------------------------------------------

    /** Creates a new instance of CategoryFilter */
00090     public CCTResultsFilter() {
        evaluators = new HashSet /*<Evaluator>*/();
        passFlagStack = new Stack();
        doReset();
    }

    public void setEvaluators(Collection evaluatorProviders) {
        this.evaluatorProviders.clear();
        this.evaluatorProviders.addAll(evaluatorProviders);
    }

    //~ Methods ------------------------------------------------------------------------------------------------------------------
    public synchronized boolean passesFilter() {
        return passingFilter;
    }

    public void beforeWalk() {
        super.beforeWalk();
        evaluators.clear();
        
        for(Iterator iter = evaluatorProviders.iterator();iter.hasNext();) {
            evaluators.addAll(((EvaluatorProvider)iter.next()).getEvaluators());
        }
    }

    public void afterWalk() {
        evaluators.clear();
        super.afterWalk();
    }

    public void reset() {
        doReset();
    }

    public void visit(ThreadCPUCCTNode node) {
        LOGGER.finest("visiting thread node");
        passFlagStack.push(Boolean.valueOf(passingFilter));
        passingFilter = true;

        for (Iterator iter = evaluators.iterator(); iter.hasNext();) {
            Evaluator evaluator = (Evaluator) iter.next();
            passingFilter &= evaluator.evaluate(Mark.DEFAULT);
        }

        LOGGER.finest("Evaluator result: " + passingFilter);
        super.visit(node);
    }

    public void visit(MarkedCPUCCTNode node) {
        if (LOGGER.isLoggable(Level.FINEST)) {
            LOGGER.finest("Entering a node marked " + node.getMark().getId()); // NOI18N
        }

        passFlagStack.push(Boolean.valueOf(passingFilter));
        passingFilter = true;

        for (Iterator iter = evaluators.iterator(); iter.hasNext();) {
            Evaluator evaluator = (Evaluator) iter.next();
            passingFilter &= evaluator.evaluate(node.getMark());
        }
    }

    public void visitPost(ThreadCPUCCTNode node) {
        super.visitPost(node);

        if (!passFlagStack.isEmpty()) {
            passingFilter = ((Boolean) passFlagStack.pop()).booleanValue();
        }
    }

    public void visitPost(MarkedCPUCCTNode node) {
        if (LOGGER.isLoggable(Level.FINEST)) {
            LOGGER.finest("Leaving a node marked " + node.getMark().getId()); // NOI18N
        }

        if (!passFlagStack.isEmpty()) {
            passingFilter = ((Boolean) passFlagStack.pop()).booleanValue();
        }
    }

    private void doReset() {
        passingFilter = false;
        passFlagStack.clear();
    }
}

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