org.jruby.ext.coverage.CoverageData Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of killbill-osgi-bundles-jruby Show documentation

There is a newer version: 0.8.14

Show newest version

package org.jruby.ext.coverage;

import java.util.HashMap;
import java.util.Map;
import org.jruby.Ruby;
import org.jruby.runtime.EventHook;
import org.jruby.runtime.RubyEvent;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;

public class CoverageData {
    private volatile Map coverage;

    public boolean isCoverageEnabled() {
        return coverage != null;
    }

    public synchronized void setCoverageEnabled(Ruby runtime, boolean enabled) {
        if (enabled) {
            coverage = new HashMap();
            runtime.addEventHook(COVERAGE_HOOK);
        } else {
            coverage = null;
        }
    }

    public synchronized Map resetCoverage(Ruby runtime) {
        Map coverage = this.coverage;
        runtime.removeEventHook(COVERAGE_HOOK);
        this.coverage = null;
        
        return coverage;
    }

    public synchronized Map prepareCoverage(String filename, Integer[] lines) {
        assert lines != null;

        Map coverage = this.coverage;

        if (coverage != null) {
            coverage.put(filename, lines);
        }

        return coverage;
    }
    
    private final EventHook COVERAGE_HOOK = new EventHook() {
        @Override
        public synchronized void eventHandler(ThreadContext context, String eventName, String file, int line, String name, IRubyObject type) {
            if (coverage == null || line <= 0) {
                return;
            }
            
            // make sure we have a lines array of acceptable length for the given file
            Integer[] lines = coverage.get(file);
            if (lines == null) {
                // loaded before coverage; skip
                return;
            } else if (lines.length <= line) {
                // can this happen? shouldn't all coverable lines be here already (from parse time)?
                Integer[] newLines = new Integer[line];
                System.arraycopy(lines, 0, newLines, 0, lines.length);
                lines = newLines;
                coverage.put(file, lines);
            }
            
            // increment the line's count or set it to 1
            Integer count = lines[line - 1];
            if (count == null) {
                lines[line - 1] = 1;
            } else {
                lines[line - 1] = count + 1;
            }
        }

        @Override
        public boolean isInterestedInEvent(RubyEvent event) {
            return event == RubyEvent.LINE;
        }
    };
    
}