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AssertFilter.java
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AssertFilter.java
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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:
* Evgeny Mandrikov - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.internal.analysis.filter;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.tree.AbstractInsnNode;
import org.objectweb.asm.tree.MethodNode;
/**
* Filters code that is generated for an <code>assert</code> statement.
*/
final class AssertFilter implements IFilter {
public void filter(final MethodNode methodNode,
final IFilterContext context, final IFilterOutput output) {
final Matcher matcher = new Matcher();
if ("<clinit>".equals(methodNode.name)) {
for (final AbstractInsnNode i : methodNode.instructions) {
matcher.matchSet(context.getClassName(), i, output);
}
}
for (final AbstractInsnNode i : methodNode.instructions) {
matcher.matchGet(context.getClassName(), i, output);
}
}
private static class Matcher extends AbstractMatcher {
public void matchSet(final String className,
final AbstractInsnNode start, final IFilterOutput output) {
cursor = start;
nextIsInvoke(Opcodes.INVOKEVIRTUAL, "java/lang/Class",
"desiredAssertionStatus", "()Z");
nextIs(Opcodes.IFNE);
nextIs(Opcodes.ICONST_1);
nextIs(Opcodes.GOTO);
nextIs(Opcodes.ICONST_0);
nextIsField(Opcodes.PUTSTATIC, className, "$assertionsDisabled",
"Z");
if (cursor != null) {
output.ignore(start, cursor);
}
}
public void matchGet(final String className,
final AbstractInsnNode start, final IFilterOutput output) {
cursor = start;
nextIsField(Opcodes.GETSTATIC, className, "$assertionsDisabled",
"Z");
nextIs(Opcodes.IFNE);
if (cursor != null) {
output.ignore(cursor, cursor);
}
}
}
}