code: /*******************************************************************************
   * Based heavily on Jacoco's Analyzer.java, original author and license below.
   * Modified by Jonathan Bell
   *
   *
   * Copyright (c) 2009, 2017 Mountainminds GmbH & Co. KG and Contributors
   * 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:
   *    Marc R. Hoffmann - initial API and implementation
   *
   *******************************************************************************/
  package edu.gmu.swe.kp.report.jacoco;
  
  import org.jacoco.core.analysis.ICoverageVisitor;
  import org.jacoco.core.data.ExecutionDataStore;
  import org.jacoco.core.internal.ContentTypeDetector;
  import org.jacoco.core.internal.Java9Support;
  import org.jacoco.core.internal.Pack200Streams;
  import org.jacoco.core.internal.analysis.StringPool;
  import org.jacoco.core.internal.data.CRC64;
  import org.jacoco.core.internal.flow.ClassProbesAdapter;
  import org.objectweb.asm.ClassReader;
  import org.objectweb.asm.ClassVisitor;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.HashMap;
  import java.util.StringTokenizer;
  import java.util.zip.GZIPInputStream;
  import java.util.zip.ZipEntry;
  import java.util.zip.ZipInputStream;
  
  /**
   * An {@link Analyzer} instance processes a set of Java class files and
   * calculates coverage data for them. For each class file the result is reported
   * to a given {@link ICoverageVisitor} instance. In addition the
   * {@link Analyzer} requires a {@link ExecutionDataStore} instance that holds
   * the execution data for the classes to analyze. The {@link Analyzer} offers
   * several methods to analyze classes from a variety of sources.
   */
  public class Analyzer {
  
  	private final HashMap<String, HashMap<String, boolean[]>> executionData;
  	private final SessionCoverageVisitor visitor;
  
  	private final StringPool stringPool;
  	private final JSONFormatter formatter;
  
  	/**
  	 * Creates a new analyzer reporting to the given output.
  	 *
  	 * @param executionData execution data
  	 * @param visitor       the output instance that will coverage data for every analyzed
  	 *                      class
  	 */
  	public Analyzer(final HashMap<String, HashMap<String, boolean[]>> executionData, final JSONFormatter formatter,
  	                final SessionCoverageVisitor visitor, StringPool stringPool) {
  		this.executionData = executionData;
  		this.visitor = visitor;
  		this.formatter = formatter;
  		this.stringPool = stringPool;
  	}
  
  	/**
  	 * Creates an ASM class visitor for analysis.
  	 *
  	 * @param classid   id of the class calculated with {@link CRC64}
  	 * @param className VM name of the class
  	 * @return ASM visitor to write class definition to
  	 */
  	private ClassVisitor createAnalyzingVisitor(final long classid,
  	                                            final String className) {
  //		final ClassCoverageImpl coverage = new ClassCoverageImpl(className,
  //				classid, false);
  		final ClassAnalyzer analyzer = new ClassAnalyzer(visitor, executionData,
  				stringPool, classid, className) {
  			@Override
  			public void visitEnd() {
  				super.visitEnd();
  //				coverageVisitor.visitCoverage(coverage);
  			}
  		};
  		return new ClassProbesAdapter(analyzer, false);
  	}
  
  	/**
  	 * Analyzes the class given as a ASM reader.
  	 *
  	 * @param reader reader with class definitions
  	 */
  	public void analyzeClass(final ClassReader reader) {
  		try {
  			final ClassVisitor visitor = createAnalyzingVisitor(
  					CRC64.checksum(reader.b), reader.getClassName());
  			reader.accept(visitor, 0);
  		} catch (Throwable t) {
  			t.printStackTrace();
  		}
  	}
  
  	/**
  	 * Analyzes the class definition from a given in-memory buffer.
  	 *
  	 * @param buffer   class definitions
  	 * @param location a location description used for exception messages
  	 * @throws IOException if the class can't be analyzed
  	 */
  	public void analyzeClass(final byte[] buffer, final String location)
  			throws IOException {
  		try {
  			analyzeClass(
  					new ClassReader(Java9Support.downgradeIfRequired(buffer)));
  		} catch (final Throwable cause) {
  			System.err.println("Error while analyzing " + location);
  			cause.printStackTrace();
  //			throw analyzerError(location, cause);
  		}
  	}
  
  	/**
  	 * Analyzes the class definition from a given input stream.
  	 *
  	 * @param input    stream to read class definition from
  	 * @param location a location description used for exception messages
  	 * @throws IOException if the stream can't be read or the class can't be analyzed
  	 */
  	public void analyzeClass(final InputStream input, final String location)
  			throws IOException {
  		final byte[] buffer;
  		try {
  			buffer = Java9Support.readFully(input);
  		} catch (final IOException e) {
  			throw analyzerError(location, e);
  		}
  		analyzeClass(buffer, location);
  	}
  
  	private IOException analyzerError(final String location,
  	                                  final Exception cause) {
  		final IOException ex = new IOException(String.format(
  				"Error while analyzing %s.", location));
  		ex.initCause(cause);
  		return ex;
  	}
  
  	/**
  	 * Analyzes all classes found in the given input stream. The input stream
  	 * may either represent a single class file, a ZIP archive, a Pack200
  	 * archive or a gzip stream that is searched recursively for class files.
  	 * All other content types are ignored.
  	 *
  	 * @param input    input data
  	 * @param location a location description used for exception messages
  	 * @return number of class files found
  	 * @throws IOException if the stream can't be read or a class can't be analyzed
  	 */
  	public int analyzeAll(final InputStream input, final String location)
  			throws IOException {
  		final ContentTypeDetector detector;
  		try {
  			detector = new ContentTypeDetector(input);
  		} catch (IOException e) {
  			throw analyzerError(location, e);
  		}
  		switch (detector.getType()) {
  			case ContentTypeDetector.CLASSFILE:
  				analyzeClass(detector.getInputStream(), location);
  				return 1;
  			case ContentTypeDetector.ZIPFILE:
  				return analyzeZip(detector.getInputStream(), location);
  			case ContentTypeDetector.GZFILE:
  				return analyzeGzip(detector.getInputStream(), location);
  			case ContentTypeDetector.PACK200FILE:
  				return analyzePack200(detector.getInputStream(), location);
  			default:
  				return 0;
  		}
  	}
  
  	/**
  	 * Analyzes all class files contained in the given file or folder. Class
  	 * files as well as ZIP files are considered. Folders are searched
  	 * recursively.
  	 *
  	 * @param file file or folder to look for class files
  	 * @return number of class files found
  	 * @throws IOException if the file can't be read or a class can't be analyzed
  	 */
  	public int analyzeAll(final File file) throws IOException {
  		int count = 0;
  		if (file.isDirectory()) {
  			for (final File f : file.listFiles()) {
  				count += analyzeAll(f);
  			}
  		} else {
  			final InputStream in = new FileInputStream(file);
  			try {
  				count += analyzeAll(in, file.getPath());
  			} finally {
  				in.close();
  			}
  		}
  		return count;
  	}
  
  	/**
  	 * Analyzes all classes from the given class path. Directories containing
  	 * class files as well as archive files are considered.
  	 *
  	 * @param path    path definition
  	 * @param basedir optional base directory, if <code>null</code> the current
  	 *                working directory is used as the base for relative path
  	 *                entries
  	 * @return number of class files found
  	 * @throws IOException if a file can't be read or a class can't be analyzed
  	 */
  	public int analyzeAll(final String path, final File basedir)
  			throws IOException {
  		int count = 0;
  		final StringTokenizer st = new StringTokenizer(path,
  				File.pathSeparator);
  		while (st.hasMoreTokens()) {
  			count += analyzeAll(new File(basedir, st.nextToken()));
  		}
  		return count;
  	}
  
  	private int analyzeZip(final InputStream input, final String location)
  			throws IOException {
  		final ZipInputStream zip = new ZipInputStream(input);
  		ZipEntry entry;
  		int count = 0;
  		while ((entry = nextEntry(zip, location)) != null) {
  			count += analyzeAll(zip, location + "@" + entry.getName());
  		}
  		return count;
  	}
  
  	private ZipEntry nextEntry(ZipInputStream input, String location)
  			throws IOException {
  		try {
  			return input.getNextEntry();
  		} catch (IOException e) {
  			throw analyzerError(location, e);
  		}
  	}
  
  	private int analyzeGzip(final InputStream input, final String location)
  			throws IOException {
  		GZIPInputStream gzipInputStream;
  		try {
  			gzipInputStream = new GZIPInputStream(input);
  		} catch (IOException e) {
  			throw analyzerError(location, e);
  		}
  		return analyzeAll(gzipInputStream, location);
  	}
  
  	private int analyzePack200(final InputStream input, final String location)
  			throws IOException {
  		InputStream unpackedInput;
  		try {
  			unpackedInput = Pack200Streams.unpack(input);
  		} catch (IOException e) {
  			throw analyzerError(location, e);
  		}
  		return analyzeAll(unpackedInput, location);
  	}
  
  }
  