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/*
* SonarQube Java
* Copyright (C) 2012-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the Sonar Source-Available License for more details.
*
* You should have received a copy of the Sonar Source-Available License
* along with this program; if not, see https://sonarsource.com/license/ssal/
*/
package org.sonar.java.checks;
import org.sonar.check.Rule;
import org.sonar.java.checks.methods.AbstractMethodDetection;
import org.sonar.plugins.java.api.semantic.MethodMatchers;
import org.sonar.plugins.java.api.tree.MethodInvocationTree;
import org.sonar.plugins.java.api.tree.Tree;
import org.sonar.plugins.java.api.tree.VariableTree;
@Rule(key = "S899")
public class IgnoredOperationStatusCheck extends AbstractMethodDetection {
private static final String FILE = "java.io.File";
private static final String CONDITION = "java.util.concurrent.locks.Condition";
private static final String BLOCKING_QUEUE = "java.util.concurrent.BlockingQueue";
@Override
protected MethodMatchers getMethodInvocationMatchers() {
return MethodMatchers.or(
MethodMatchers.create().ofSubTypes("java.util.concurrent.locks.Lock").names("tryLock").addWithoutParametersMatcher().build(),
MethodMatchers.create().ofTypes(FILE)
.name(name -> "delete".equals(name) || "exists".equals(name) || "createNewFile".equals(name) ||
name.startsWith("can") || name.startsWith("is"))
.addWithoutParametersMatcher()
.build(),
MethodMatchers.create().ofTypes(FILE).name(name -> name.startsWith("set"))
.withAnyParameters().build(),
MethodMatchers.create().ofTypes(FILE).names("renameTo").addParametersMatcher(FILE).build(),
MethodMatchers.create().ofSubTypes("java.util.Iterator").names("hasNext").addWithoutParametersMatcher().build(),
MethodMatchers.create().ofSubTypes("java.util.Enumeration").names("hasMoreElements").addWithoutParametersMatcher().build(),
MethodMatchers.create().ofSubTypes(CONDITION).names("await").addParametersMatcher("long", "java.util.concurrent.TimeUnit").build(),
MethodMatchers.create().ofSubTypes(CONDITION).names("awaitUntil").addParametersMatcher("java.util.Date").build(),
MethodMatchers.create().ofSubTypes(CONDITION).names("awaitNanos").addParametersMatcher("long").build(),
MethodMatchers.create().ofTypes("java.util.concurrent.CountDownLatch").names("await").addParametersMatcher("long", "java.util.concurrent.TimeUnit").build(),
MethodMatchers.create().ofTypes("java.util.concurrent.Semaphore").names("tryAcquire").withAnyParameters().build(),
MethodMatchers.create().ofSubTypes(BLOCKING_QUEUE).names("offer").withAnyParameters().build(),
MethodMatchers.create().ofSubTypes(BLOCKING_QUEUE).names("remove").withAnyParameters().build());
}
@Override
protected void onMethodInvocationFound(MethodInvocationTree mit) {
Tree parent = mit.parent();
if (parent.is(Tree.Kind.EXPRESSION_STATEMENT)
|| (parent.is(Tree.Kind.VARIABLE) && ((VariableTree) parent).symbol().usages().isEmpty())) {
reportIssue(parent, "Do something with the \"" + mit.symbolType().name() + "\" value returned by \"" + mit.methodSymbol().name() + "\".");
}
}
}
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