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/*******************************************************************************
* Copyright (c) 2009, 2021 Mountainminds GmbH & Co. KG and Contributors
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Marc R. Hoffmann - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.internal.instr;
import org.jacoco.core.internal.flow.ClassProbesAdapter;
import org.jacoco.core.runtime.IExecutionDataAccessorGenerator;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.Opcodes;
/**
* Factory to find a suitable strategy to access the probe array for a given
* class.
*/
public final class ProbeArrayStrategyFactory {
private ProbeArrayStrategyFactory() {
}
/**
* Creates a suitable strategy instance for the class described by the given
* reader. Created instance must be used only to process a class or
* interface for which it has been created and must be used only once.
*
* @param classId
* class identifier
* @param reader
* reader to get information about the class
* @param accessorGenerator
* accessor to the coverage runtime
* @return strategy instance
*/
public static IProbeArrayStrategy createFor(final long classId,
final ClassReader reader,
final IExecutionDataAccessorGenerator accessorGenerator) {
final String className = reader.getClassName();
final int version = InstrSupport.getMajorVersion(reader);
if (isInterfaceOrModule(reader)) {
final ProbeCounter counter = getProbeCounter(reader);
if (counter.getCount() == 0) {
return new NoneProbeArrayStrategy();
}
// BEGIN android-change
// See https://github.com/jacoco/jacoco/issues/1151
// if (version >= Opcodes.V11 && counter.hasMethods()) {
// return new CondyProbeArrayStrategy(className, true, classId,
// accessorGenerator);
// }
// END android-change
if (version >= Opcodes.V1_8 && counter.hasMethods()) {
return new InterfaceFieldProbeArrayStrategy(className, classId,
counter.getCount(), accessorGenerator);
} else {
return new LocalProbeArrayStrategy(className, classId,
counter.getCount(), accessorGenerator);
}
} else {
// BEGIN android-change
// See https://github.com/jacoco/jacoco/issues/1151
// if (version >= Opcodes.V11) {
// return new CondyProbeArrayStrategy(className, false, classId,
// accessorGenerator);
// }
// END android-change
return new ClassFieldProbeArrayStrategy(className, classId,
InstrSupport.needsFrames(version), accessorGenerator);
}
}
private static boolean isInterfaceOrModule(final ClassReader reader) {
return (reader.getAccess()
& (Opcodes.ACC_INTERFACE | Opcodes.ACC_MODULE)) != 0;
}
private static ProbeCounter getProbeCounter(final ClassReader reader) {
final ProbeCounter counter = new ProbeCounter();
reader.accept(new ClassProbesAdapter(counter, false), 0);
return counter;
}
}
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