/
LowercasePackage.java
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/
LowercasePackage.java
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/*
* Copyright 2022 the original author or authors.
* <p>
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* <p>
* https://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.openrewrite.staticanalysis;
import org.openrewrite.*;
import org.openrewrite.internal.lang.Nullable;
import org.openrewrite.java.ChangePackage;
import org.openrewrite.java.JavaIsoVisitor;
import org.openrewrite.java.tree.J;
import org.openrewrite.java.tree.JavaSourceFile;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import static java.util.Objects.requireNonNull;
public class LowercasePackage extends ScanningRecipe<Map<String, String>> {
@Override
public String getDisplayName() {
return "Rename packages to lowercase";
}
@Override
public String getDescription() {
return "By convention all Java package names should contain only lowercase letters, numbers, and dashes. " +
"This recipe converts any uppercase letters in package names to be lowercase.";
}
@Override
public Set<String> getTags() {
return Collections.singleton("RSPEC-S120");
}
@Override
public Map<String, String> getInitialValue(ExecutionContext ctx) {
return new HashMap<>();
}
@Override
public TreeVisitor<?, ExecutionContext> getScanner(Map<String, String> acc) {
return new JavaIsoVisitor<ExecutionContext>() {
@Override
public @Nullable J preVisit(J tree, ExecutionContext ctx) {
if (tree instanceof JavaSourceFile) {
JavaSourceFile cu = (JavaSourceFile) requireNonNull(tree);
J.Package pkg = cu.getPackageDeclaration();
if (pkg != null) {
String packageText = getPackageText(getCursor(), pkg);
String lowerCase = packageText.toLowerCase();
if (!packageText.equals(lowerCase)) {
acc.put(packageText, lowerCase);
}
}
stopAfterPreVisit();
}
return super.preVisit(tree, ctx);
}
};
}
@Override
public TreeVisitor<?, ExecutionContext> getVisitor(Map<String, String> acc) {
return Preconditions.check(!acc.isEmpty(), new JavaIsoVisitor<ExecutionContext>() {
@Override
public J preVisit(J tree, ExecutionContext ctx) {
if (tree instanceof JavaSourceFile) {
JavaSourceFile cu = (JavaSourceFile) requireNonNull(tree);
J.Package pkg = cu.getPackageDeclaration();
if (pkg != null) {
String packageText = getPackageText(getCursor(), pkg);
if (acc.containsKey(packageText)) {
return (JavaSourceFile) new ChangePackage(packageText, acc.get(packageText), true)
.getVisitor().visitNonNull(cu, ctx);
}
}
stopAfterPreVisit();
}
return tree;
}
});
}
private String getPackageText(Cursor cursor, J.Package pkg) {
return pkg.getExpression().print(cursor).replaceAll("\\s", "");
}
}