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| package net.sourceforge.pmd.rules.imports; |
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| import net.sourceforge.pmd.AbstractRule; |
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| import net.sourceforge.pmd.ast.ASTClassOrInterfaceType; |
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| import net.sourceforge.pmd.ast.ASTCompilationUnit; |
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| import net.sourceforge.pmd.ast.ASTImportDeclaration; |
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| import net.sourceforge.pmd.ast.ASTName; |
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| import net.sourceforge.pmd.ast.SimpleJavaNode; |
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| import net.sourceforge.pmd.ast.SimpleNode; |
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| import net.sourceforge.pmd.rules.ImportWrapper; |
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| import java.util.HashSet; |
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| import java.util.Iterator; |
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| import java.util.Set; |
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| public class UnusedImportsRule extends AbstractRule { |
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| private Set imports = new HashSet(); |
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| public Object visit(ASTCompilationUnit node, Object data) {
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| imports.clear();
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| super.visit(node, data);
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| for (Iterator i = imports.iterator(); i.hasNext();) {
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| ImportWrapper wrapper = (ImportWrapper) i.next();
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| addViolation(data, wrapper.getNode(), wrapper.getFullName());
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| } |
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| return data;
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| } |
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| public Object visit(ASTImportDeclaration node, Object data) {
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| if (!node.isImportOnDemand()) {
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| ASTName importedType = (ASTName) node.jjtGetChild(0);
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| String className;
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| if (isQualifiedName(importedType)) {
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| int lastDot = importedType.getImage().lastIndexOf('.') + 1;
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| className = importedType.getImage().substring(lastDot);
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| } else { |
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| className = importedType.getImage();
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| } |
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| imports.add(new ImportWrapper(importedType.getImage(), className, node));
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| } |
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| return data;
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| } |
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| public Object visit(ASTClassOrInterfaceType node, Object data) {
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| check(node);
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| return super.visit(node, data);
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| } |
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| public Object visit(ASTName node, Object data) {
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| check(node);
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| return data;
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| } |
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| private void check(SimpleNode node) {
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| String name;
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| if (!isQualifiedName(node)) {
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| name = node.getImage();
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| } else { |
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| name = node.getImage().substring(0, node.getImage().indexOf('.'));
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| } |
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| ImportWrapper candidate = new ImportWrapper(node.getImage(), name, new SimpleJavaNode(-1));
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| if (imports.contains(candidate)) {
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| imports.remove(candidate);
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| } |
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| } |
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| } |