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| package net.sourceforge.pmd.rules; |
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| import net.sourceforge.pmd.AbstractRule; |
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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 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 DuplicateImportsRule extends AbstractRule { |
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| private Set singleTypeImports; |
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| private Set importOnDemandImports; |
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| public Object visit(ASTCompilationUnit node, Object data) {
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| singleTypeImports = new HashSet();
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| importOnDemandImports = new HashSet();
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| super.visit(node, data);
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| for (Iterator i = importOnDemandImports.iterator(); i.hasNext();) {
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| ImportWrapper thisImportOnDemand = (ImportWrapper) i.next();
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| for (Iterator j = singleTypeImports.iterator(); j.hasNext();) {
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| ImportWrapper thisSingleTypeImport = (ImportWrapper) j.next();
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| String singleTypePkg = thisSingleTypeImport.getName().substring(0, thisSingleTypeImport.getName().lastIndexOf("."));
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| if (thisImportOnDemand.getName().equals(singleTypePkg)) {
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| addViolation(data, thisSingleTypeImport.getNode(), thisSingleTypeImport.getName());
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| } |
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| } |
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| } |
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| singleTypeImports.clear();
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| importOnDemandImports.clear();
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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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| ImportWrapper wrapper = new ImportWrapper(node.getImportedName(), node.getImportedName(), node.getImportedNameNode());
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| if (node.isImportOnDemand()) {
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| if (importOnDemandImports.contains(wrapper)) {
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| addViolation(data, node.getImportedNameNode(), node.getImportedNameNode().getImage());
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| } else { |
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| importOnDemandImports.add(wrapper);
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| } |
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| } else { |
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| if (singleTypeImports.contains(wrapper)) {
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| addViolation(data, node.getImportedNameNode(), node.getImportedNameNode().getImage());
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| } else { |
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| singleTypeImports.add(wrapper);
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| } |
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| } |
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| return data;
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| } |
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| } |