Remove instrument(ClassReader) and analyzeClass(ClassReader) (bazel-contrib#850)

* they use field `ClassReader.b` which is marked as deprecated in ASM 7.1

* they don't work when field contains more than just bytes of one class
  (see `ClassReader(byte[] classFileBuffer, int classFileOffset, int classFileLength)`)

Author: Godin

org.jacoco.core.test/src/org/jacoco/core/test/perf/ExecuteInstrumentedCodeScenario.java

@@ -18,7 +18,6 @@
 import org.jacoco.core.runtime.LoggerRuntime;
 import org.jacoco.core.runtime.RuntimeData;
 import org.jacoco.core.test.TargetLoader;
-import org.objectweb.asm.ClassReader;
 
 /**
  * This scenario runs a given scenario twice and reports the execution time:
@@ -37,11 +36,11 @@ protected ExecuteInstrumentedCodeScenario(String description,
 	@Override
 	@SuppressWarnings("unchecked")
 	protected Callable<Void> getInstrumentedCallable() throws Exception {
-		ClassReader reader = new ClassReader(TargetLoader.getClassData(target));
 		IRuntime runtime = new LoggerRuntime();
 		runtime.startup(new RuntimeData());
 		final Instrumenter instr = new Instrumenter(runtime);
-		final byte[] instrumentedBuffer = instr.instrument(reader);
+		final byte[] original = TargetLoader.getClassDataAsBytes(target);
+		final byte[] instrumentedBuffer = instr.instrument(original, "");
 		final TargetLoader loader = new TargetLoader();
 
 		return (Callable<Void>) loader.add(target, instrumentedBuffer)

org.jacoco.core.test/src/org/jacoco/core/test/perf/InstrumentationSizeSzenario.java

@@ -15,7 +15,6 @@
 import org.jacoco.core.runtime.IRuntime;
 import org.jacoco.core.runtime.LoggerRuntime;
 import org.jacoco.core.test.TargetLoader;
-import org.objectweb.asm.ClassReader;
 
 /**
  * Scenario to measure the overhead in terms of additional byte code size
@@ -31,11 +30,11 @@ public InstrumentationSizeSzenario(Class<?> target) {
 
 	public void run(IPerfOutput output) throws Exception {
 		final IRuntime runtime = new LoggerRuntime();
-		ClassReader reader = new ClassReader(TargetLoader.getClassData(target));
 		final Instrumenter instr = new Instrumenter(runtime);
-		instr.instrument(reader);
-		output.writeByteResult("instrumented class",
-				instr.instrument(reader).length, reader.b.length);
+		final byte[] original = TargetLoader.getClassDataAsBytes(target);
+		final byte[] instrumented = instr.instrument(original, "");
+		output.writeByteResult("instrumented class", instrumented.length,
+				original.length);
 	}
 
 }

org.jacoco.core/src/org/jacoco/core/analysis/Analyzer.java

@@ -101,16 +101,6 @@ public void visitEnd() {
 		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) {
-		analyzeClass(reader.b);
-	}
-
 	private void analyzeClass(final byte[] source) {
 		final long classId = CRC64.classId(source);
 		final ClassReader reader = InstrSupport.classReaderFor(source);

org.jacoco.core/src/org/jacoco/core/instr/Instrumenter.java

@@ -69,18 +69,6 @@ public void setRemoveSignatures(final boolean flag) {
 		signatureRemover.setActive(flag);
 	}
 
-	/**
-	 * Creates a instrumented version of the given class if possible.
-	 * 
-	 * @param reader
-	 *            definition of the class as ASM reader
-	 * @return instrumented definition
-	 * 
-	 */
-	public byte[] instrument(final ClassReader reader) {
-		return instrument(reader.b);
-	}
-
 	private byte[] instrument(final byte[] source) {
 		final long classId = CRC64.classId(source);
 		final ClassReader reader = InstrSupport.classReaderFor(source);

org.jacoco.doc/docroot/doc/changes.html

@@ -21,13 +21,20 @@ <h1>Change History</h1>
 <h2>Snapshot Build @qualified.bundle.version@ (@build.date@)</h2>
 
 <h3>New Features</h3>
-
 <ul>
   <li>Branches added by the Kotlin compiler version 1.3.30 for suspending lambdas
       and functions are filtered out during generation of report
       (GitHub <a href="https://github.com/jacoco/jacoco/issues/849">#849</a>).</li>
 </ul>
 
+<h3>API Changes</h3>
+<ul>
+    <li>Methods <code>Instrumenter.instrument(org.objectweb.asm.ClassReader)</code>
+        and <code>Analyzer.analyzeClass(org.objectweb.asm.ClassReader)</code>
+        were removed
+        (GitHub <a href="https://github.com/jacoco/jacoco/issues/850">#850</a>).</li>
+</ul>
+
 <h2>Release 0.8.3 (2019/01/23)</h2>
 
 <h3>New Features</h3>