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BEGIN LICENSE BLOCK ***** Version: EPL 1.0/GPL 2.0/LGPL 2.1 The contents of this file are subject to the Eclipse Public License Version 1.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.eclipse.org/legal/epl-v10.html Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. Alternatively, the contents of this file may be used under the terms of either of the GNU General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the LGPL are applicable instead of those above. If you wish to allow use of your version of this file only under the terms of either the GPL or the LGPL, and not to allow others to use your version of this file under the terms of the EPL, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL or the LGPL. If you do not delete the provisions above, a recipient may use your version of this file under the terms of any one of the EPL, the GPL or the LGPL. END LICENSE BLOCK ***
 
 
 package org.jruby.ext.coverage;
 
 import java.util.Map;
 import org.jruby.Ruby;
 
 public class CoverageData {
     private volatile Map<StringInteger[]> coverage;
 
     public boolean isCoverageEnabled() {
         return  != null;
     }
 
     public synchronized void setCoverageEnabled(Ruby runtimeboolean enabled) {
         if (enabled) {
              = new HashMap<StringInteger[]>();
             runtime.addEventHook();
         } else {
              = null;
         }
     }
 
     public synchronized Map<StringInteger[]> resetCoverage(Ruby runtime) {
         Map<StringInteger[]> coverage = this.;
         runtime.removeEventHook();
         this. = null;
         
         return coverage;
     }
 
     public synchronized Map<StringInteger[]> prepareCoverage(String filenameInteger[] lines) {
         assert lines != null;
 
         Map<StringInteger[]> coverage = this.;
 
         if (coverage != null) {
             coverage.put(filenamelines);
         }
 
         return coverage;
     }
     
     private final EventHook COVERAGE_HOOK = new EventHook() {
         @Override
         public synchronized void eventHandler(ThreadContext contextString eventNameString fileint lineString nameIRubyObject type) {
             if ( == null || line <= 0) {
                 return;
             }
             
             // make sure we have a lines array of acceptable length for the given file
             Integer[] lines = .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;
                 .put(filelines);
             }
             
             // 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 == .;
        }
    };
    
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