org.jacoco.core.runtime.OfflineInstrumentationAccessGenerator.java Source code

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Here is the source code for org.jacoco.core.runtime.OfflineInstrumentationAccessGenerator.java

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/*******************************************************************************
 * Copyright (c) 2009, 2013 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 org.jacoco.core.runtime;

import org.jacoco.core.JaCoCo;
import org.jacoco.core.internal.instr.InstrSupport;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;

/**
 * This implementation of {@link IExecutionDataAccessorGenerator} generate a
 * direct dependency to the JaCoCo runtime agent to initialize the runtime and
 * obtain probe arrays. This generator is designed for offline instrumentation
 * only.
 */
public class OfflineInstrumentationAccessGenerator implements IExecutionDataAccessorGenerator {

    private final String runtimeClassName;

    /**
     * Creates a new instance for offline instrumentation.
     */
    public OfflineInstrumentationAccessGenerator() {
        this(JaCoCo.RUNTIMEPACKAGE.replace('.', '/') + "/Offline");
    }

    /**
     * Creates a new instance with the given runtime class name for testing
     * purposes
     * 
     * @param runtimeClassName
     *            VM name of the runtime class
     */
    OfflineInstrumentationAccessGenerator(final String runtimeClassName) {
        this.runtimeClassName = runtimeClassName;
    }

    public int generateDataAccessor(final long classid, final String classname, final int probecount,
            final MethodVisitor mv) {
        mv.visitLdcInsn(Long.valueOf(classid));
        mv.visitLdcInsn(classname);
        InstrSupport.push(mv, probecount);
        mv.visitMethodInsn(Opcodes.INVOKESTATIC, runtimeClassName, "getProbes", "(JLjava/lang/String;I)[Z");
        return 4;
    }

}