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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:
* Nikolay Krasko - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.internal.analysis.filter;
import org.objectweb.asm.tree.AbstractInsnNode;
import org.objectweb.asm.tree.MethodNode;
/**
* Filters methods generated by the Kotlin compiler. Kotlin classes are
* identified by the <code>@kotlin.Metadata</code> annotations. In such classes
* generated methods do not have line numbers.
*/
public class KotlinGeneratedFilter implements IFilter {
static final String KOTLIN_METADATA_DESC = "Lkotlin/Metadata;";
static boolean isKotlinClass(final IFilterContext context) {
return context.getClassAnnotations().contains(KOTLIN_METADATA_DESC);
}
public void filter(final MethodNode methodNode,
final IFilterContext context, final IFilterOutput output) {
if (context.getSourceFileName() == null) {
// probably full debug information is missing
// disabled filtering as all methods might be erroneously skipped
return;
}
if (!isKotlinClass(context)) {
return;
}
if (hasLineNumber(methodNode)) {
return;
}
output.ignore(methodNode.instructions.getFirst(),
methodNode.instructions.getLast());
}
private boolean hasLineNumber(final MethodNode methodNode) {
for (final AbstractInsnNode i : methodNode.instructions) {
if (AbstractInsnNode.LINE == i.getType()) {
return true;
}
}
return false;
}
}
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