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| package net.sourceforge.pmd.dfa.variableaccess; |
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| import net.sourceforge.pmd.ast.ASTClassOrInterfaceBodyDeclaration; |
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| import net.sourceforge.pmd.ast.ASTConstructorDeclaration; |
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| import net.sourceforge.pmd.ast.ASTMethodDeclaration; |
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| import net.sourceforge.pmd.ast.JavaParserVisitorAdapter; |
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| import net.sourceforge.pmd.ast.SimpleNode; |
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| import net.sourceforge.pmd.dfa.IDataFlowNode; |
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| import net.sourceforge.pmd.dfa.StartOrEndDataFlowNode; |
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| import net.sourceforge.pmd.symboltable.NameOccurrence; |
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| import net.sourceforge.pmd.symboltable.VariableNameDeclaration; |
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| import java.util.ArrayList; |
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| import java.util.HashSet; |
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| import java.util.Iterator; |
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| import java.util.List; |
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| import java.util.Map; |
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| import java.util.Set; |
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| import java.util.Vector; |
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| public class VariableAccessVisitor extends JavaParserVisitorAdapter { |
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| public void compute(ASTMethodDeclaration node) {
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| if (node.jjtGetParent() instanceof ASTClassOrInterfaceBodyDeclaration) {
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| this.computeNow(node);
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| } |
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| } |
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| public void compute(ASTConstructorDeclaration node) {
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| this.computeNow(node);
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| } |
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| private void computeNow(SimpleNode node) {
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| IDataFlowNode inode = node.getDataFlowNode();
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| List undefinitions = markUsages(inode);
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| IDataFlowNode firstINode = (IDataFlowNode) inode.getFlow().get(0);
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| firstINode.setVariableAccess(undefinitions);
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| IDataFlowNode lastINode = (IDataFlowNode) inode.getFlow().get(inode.getFlow().size() - 1);
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| lastINode.setVariableAccess(undefinitions);
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| } |
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| private List markUsages(IDataFlowNode inode) {
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| List undefinitions = new ArrayList();
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| Set variableDeclarations = collectDeclarations(inode);
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| for (Iterator i = variableDeclarations.iterator(); i.hasNext();) {
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| Map declarations = (Map) i.next();
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| for (Iterator j = declarations.keySet().iterator(); j.hasNext();) {
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| VariableNameDeclaration vnd = (VariableNameDeclaration) j.next();
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| addVariableAccess(vnd.getNode().getBeginLine(), new VariableAccess(VariableAccess.DEFINITION, vnd.getImage()), inode.getFlow());
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| undefinitions.add(new VariableAccess(VariableAccess.UNDEFINITION, vnd.getImage()));
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| for (Iterator k = ((List) declarations.get(vnd)).iterator(); k.hasNext();) {
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| addAccess(k, inode);
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| } |
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| } |
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| } |
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| return undefinitions;
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| } |
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| private Set collectDeclarations(IDataFlowNode inode) {
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| Set decls = new HashSet();
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| for (int i = 0; i < inode.getFlow().size(); i++) {
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| IDataFlowNode n = (IDataFlowNode) inode.getFlow().get(i);
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| if (n instanceof StartOrEndDataFlowNode) {
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| continue;
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| } |
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| if (!decls.contains(n.getSimpleNode().getScope().getVariableDeclarations())) {
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| decls.add(n.getSimpleNode().getScope().getVariableDeclarations());
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| } |
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| } |
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| return decls;
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| } |
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| private void addAccess(Iterator k, IDataFlowNode inode) {
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| NameOccurrence occurrence = (NameOccurrence) k.next();
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| if (occurrence.isOnLeftHandSide()) {
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| this.addVariableAccess(occurrence.getLocation().getBeginLine(), new VariableAccess(VariableAccess.DEFINITION, occurrence.getImage()), inode.getFlow());
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| } else if (occurrence.isOnRightHandSide() || (!occurrence.isOnLeftHandSide() && !occurrence.isOnRightHandSide())) {
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| this.addVariableAccess(occurrence.getLocation().getBeginLine(), new VariableAccess(VariableAccess.REFERENCING, occurrence.getImage()), inode.getFlow());
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| } |
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| } |
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| private void addVariableAccess(int line, VariableAccess va, List flow) {
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| for (int i = 1; i < flow.size(); i++) {
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| IDataFlowNode inode = (IDataFlowNode) flow.get(i);
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| if (line == inode.getLine()) {
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| Vector v = new Vector();
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| v.add(va);
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| inode.setVariableAccess(v);
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| } |
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| } |
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| } |
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| } |
