com.puppycrawl.tools.checkstyle.checks.annotation.PackageAnnotationCheck Maven / Gradle / Ivy
Show all versions of checkstyle Show documentation
////////////////////////////////////////////////////////////////////////////////
// checkstyle: Checks Java source code for adherence to a set of rules.
// Copyright (C) 2001-2021 the original author or authors.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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 GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
////////////////////////////////////////////////////////////////////////////////
package com.puppycrawl.tools.checkstyle.checks.annotation;
import com.puppycrawl.tools.checkstyle.StatelessCheck;
import com.puppycrawl.tools.checkstyle.api.AbstractCheck;
import com.puppycrawl.tools.checkstyle.api.DetailAST;
import com.puppycrawl.tools.checkstyle.api.TokenTypes;
import com.puppycrawl.tools.checkstyle.utils.AnnotationUtil;
/**
*
* Checks that all package annotations are in the package-info.java file.
*
*
* For Java SE8 and above, placement of package annotations in the package-info.java
* file is enforced by the compiler and this check is not necessary.
*
*
* For Java SE7 and below, the Java Language Specification highly recommends
* but doesn't require that annotations are placed in the package-info.java file,
* and this check can help to enforce that placement.
*
*
* See
* Java Language Specification, §7.4.1 for more info.
*
*
* To configure the check:
*
*
* <module name="PackageAnnotation"/>
*
* Example of validating MyClass.java:
*
* @Deprecated
* package com.example.annotations.packageannotation; //violation
*
* Example of fixing violation in MyClass.java:
*
* package com.example.annotations.packageannotation; //ok
*
* Example of validating package-info.java:
*
* @Deprecated
* package com.example.annotations.packageannotation; //ok
*
*
* Parent is {@code com.puppycrawl.tools.checkstyle.TreeWalker}
*
*
* Violation Message Keys:
*
*
* -
* {@code annotation.package.location}
*
*
*
* @since 5.0
*/
@StatelessCheck
public class PackageAnnotationCheck extends AbstractCheck {
/**
* A key is pointing to the warning message text in "messages.properties"
* file.
*/
public static final String MSG_KEY = "annotation.package.location";
@Override
public int[] getDefaultTokens() {
return getRequiredTokens();
}
@Override
public int[] getRequiredTokens() {
return new int[] {
TokenTypes.PACKAGE_DEF,
};
}
@Override
public int[] getAcceptableTokens() {
return getRequiredTokens();
}
@Override
public void visitToken(final DetailAST ast) {
final boolean containsAnnotation =
AnnotationUtil.containsAnnotation(ast);
final boolean inPackageInfo =
getFileContents().inPackageInfo();
if (containsAnnotation && !inPackageInfo) {
log(ast, MSG_KEY);
}
}
}