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Derive FQCN of a
{@link using ImportTree
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71 changes: 71 additions & 0 deletions
71
log4j-docgen/src/main/java/org/apache/logging/log4j/docgen/processor/ElementImports.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to you 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 | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * 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.apache.logging.log4j.docgen.processor; | ||
|
|
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| import com.sun.source.tree.ImportTree; | ||
| import com.sun.source.tree.Tree; | ||
| import com.sun.source.util.TreePath; | ||
| import com.sun.source.util.TreeScanner; | ||
| import com.sun.source.util.Trees; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.TreeMap; | ||
| import org.jspecify.annotations.Nullable; | ||
|
|
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| /** | ||
| * A map associating simple class name keys with qualified class names that is collected from {@link com.sun.source.tree.ImportTree} of an {@link javax.lang.model.element.Element}. | ||
| */ | ||
| final class ElementImports extends TreeMap<String, String> { | ||
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| private static final ElementImports EMPTY = new ElementImports(); | ||
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| private static final long serialVersionUID = 0L; | ||
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| private ElementImports() {} | ||
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| private ElementImports(Map<String, String> imports) { | ||
| super(imports); | ||
| } | ||
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| static ElementImportsFactory factory(final Trees trees) { | ||
| return element -> { | ||
| final ImportCollectingTreeScanner scanner = new ImportCollectingTreeScanner(); | ||
| @Nullable final TreePath treePath = trees.getPath(element); | ||
| if (treePath == null) { | ||
| return EMPTY; | ||
| } | ||
| scanner.scan(treePath.getCompilationUnit(), null); | ||
| return new ElementImports(scanner.imports); | ||
| }; | ||
| } | ||
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| private static final class ImportCollectingTreeScanner extends TreeScanner<Object, Trees> { | ||
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| private final Map<String, String> imports = new HashMap<>(); | ||
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| private ImportCollectingTreeScanner() {} | ||
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| @Override | ||
| public Object visitImport(final ImportTree importTree, final Trees trees) { | ||
| final Tree qualifiedIdentifier = importTree.getQualifiedIdentifier(); | ||
| final String qualifiedClassName = qualifiedIdentifier.toString(); | ||
| final String simpleClassName = qualifiedClassName.substring(qualifiedClassName.lastIndexOf('.') + 1); | ||
| imports.put(simpleClassName, qualifiedClassName); | ||
| return super.visitImport(importTree, trees); | ||
| } | ||
| } | ||
| } |
25 changes: 25 additions & 0 deletions
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...docgen/src/main/java/org/apache/logging/log4j/docgen/processor/ElementImportsFactory.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to you 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 | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * 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.apache.logging.log4j.docgen.processor; | ||
|
|
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| import javax.lang.model.element.Element; | ||
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| @FunctionalInterface | ||
| interface ElementImportsFactory { | ||
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| ElementImports ofElement(Element element); | ||
| } |
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