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| package net.sourceforge.pmd.dfa; |
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| import net.sourceforge.pmd.ast.ASTBreakStatement; |
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| import net.sourceforge.pmd.ast.ASTConstructorDeclaration; |
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| import net.sourceforge.pmd.ast.ASTContinueStatement; |
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| import net.sourceforge.pmd.ast.ASTDoStatement; |
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| import net.sourceforge.pmd.ast.ASTExpression; |
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| import net.sourceforge.pmd.ast.ASTForInit; |
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| import net.sourceforge.pmd.ast.ASTForStatement; |
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| import net.sourceforge.pmd.ast.ASTForUpdate; |
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| import net.sourceforge.pmd.ast.ASTIfStatement; |
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| import net.sourceforge.pmd.ast.ASTMethodDeclaration; |
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| import net.sourceforge.pmd.ast.ASTReturnStatement; |
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| import net.sourceforge.pmd.ast.ASTStatement; |
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| import net.sourceforge.pmd.ast.ASTStatementExpression; |
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| import net.sourceforge.pmd.ast.ASTSwitchLabel; |
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| import net.sourceforge.pmd.ast.ASTSwitchStatement; |
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| import net.sourceforge.pmd.ast.ASTVariableDeclarator; |
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| import net.sourceforge.pmd.ast.ASTWhileStatement; |
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| import net.sourceforge.pmd.ast.JavaParserVisitorAdapter; |
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| import net.sourceforge.pmd.ast.SimpleNode; |
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| public class StatementAndBraceFinder extends JavaParserVisitorAdapter { |
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| |
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| private Structure dataFlow; |
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| |
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| public void buildDataFlowFor(SimpleNode node) {
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| if (!(node instanceof ASTMethodDeclaration) && !(node instanceof ASTConstructorDeclaration)) {
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| throw new RuntimeException("Can't build a data flow for anything other than a method or a constructor");
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| } |
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| |
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| this.dataFlow = new Structure();
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| this.dataFlow.createStartNode(node.getBeginLine());
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| this.dataFlow.createNewNode(node);
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| node.jjtAccept(this, dataFlow);
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| this.dataFlow.createEndNode(node.getEndLine());
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| Linker linker = new Linker(dataFlow.getBraceStack(), dataFlow.getContinueBreakReturnStack());
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| try {
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| linker.computePaths();
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| } catch (LinkerException e) { |
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0
| e.printStackTrace();
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| } catch (SequenceException e) { |
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| e.printStackTrace();
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| } |
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| } |
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| |
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| public Object visit(ASTStatementExpression node, Object data) {
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| if (!(data instanceof Structure)) {
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| return data;
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| } |
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| Structure dataFlow = (Structure) data;
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| dataFlow.createNewNode(node);
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| return super.visit(node, data);
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| } |
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| public Object visit(ASTVariableDeclarator node, Object data) {
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| if (!(data instanceof Structure)) {
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| return data;
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| } |
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| Structure dataFlow = (Structure) data;
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| dataFlow.createNewNode(node);
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| return super.visit(node, data);
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| } |
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| public Object visit(ASTExpression node, Object data) {
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| if (!(data instanceof Structure)) {
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| return data;
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| } |
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| Structure dataFlow = (Structure) data;
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| if (node.jjtGetParent() instanceof ASTIfStatement) {
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| dataFlow.createNewNode(node);
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| dataFlow.pushOnStack(NodeType.IF_EXPR, dataFlow.getLast());
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| } else if (node.jjtGetParent() instanceof ASTWhileStatement) {
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| dataFlow.createNewNode(node);
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| dataFlow.pushOnStack(NodeType.WHILE_EXPR, dataFlow.getLast());
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| } else if (node.jjtGetParent() instanceof ASTSwitchStatement) {
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| dataFlow.createNewNode(node);
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| dataFlow.pushOnStack(NodeType.SWITCH_START, dataFlow.getLast());
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| } else if (node.jjtGetParent() instanceof ASTForStatement) {
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| dataFlow.createNewNode(node);
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| dataFlow.pushOnStack(NodeType.FOR_EXPR, dataFlow.getLast());
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| } else if (node.jjtGetParent() instanceof ASTDoStatement) {
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| dataFlow.createNewNode(node);
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| dataFlow.pushOnStack(NodeType.DO_EXPR, dataFlow.getLast());
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| } |
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| |
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| return super.visit(node, data);
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| } |
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| public Object visit(ASTForInit node, Object data) {
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| if (!(data instanceof Structure)) {
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| return data;
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| } |
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| Structure dataFlow = (Structure) data;
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| super.visit(node, data);
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| dataFlow.pushOnStack(NodeType.FOR_INIT, dataFlow.getLast());
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| this.addForExpressionNode(node, dataFlow);
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| return data;
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| } |
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| |
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| public Object visit(ASTForUpdate node, Object data) {
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| if (!(data instanceof Structure)) {
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| return data;
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| } |
120 |
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| Structure dataFlow = (Structure) data;
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| this.addForExpressionNode(node, dataFlow);
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| super.visit(node, data);
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| dataFlow.pushOnStack(NodeType.FOR_UPDATE, dataFlow.getLast());
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| return data;
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| } |
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| public Object visit(ASTStatement node, Object data) {
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| if (!(data instanceof Structure)) {
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| return data;
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| } |
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| Structure dataFlow = (Structure) data;
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| if (node.jjtGetParent() instanceof ASTForStatement) {
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| this.addForExpressionNode(node, dataFlow);
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| dataFlow.pushOnStack(NodeType.FOR_BEFORE_FIRST_STATEMENT, dataFlow.getLast());
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| } else if (node.jjtGetParent() instanceof ASTDoStatement) {
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| dataFlow.pushOnStack(NodeType.DO_BEFORE_FIRST_STATEMENT, dataFlow.getLast());
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| dataFlow.createNewNode((SimpleNode) node.jjtGetParent());
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| } |
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| super.visit(node, data);
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| if (node.jjtGetParent() instanceof ASTIfStatement) {
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| ASTIfStatement st = (ASTIfStatement) node.jjtGetParent();
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| if (!st.hasElse()) {
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| dataFlow.pushOnStack(NodeType.IF_LAST_STATEMENT_WITHOUT_ELSE, dataFlow.getLast());
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| } else if (st.hasElse() && !st.jjtGetChild(1).equals(node)) {
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| dataFlow.pushOnStack(NodeType.ELSE_LAST_STATEMENT, dataFlow.getLast());
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| } else { |
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| dataFlow.pushOnStack(NodeType.IF_LAST_STATEMENT, dataFlow.getLast());
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| } |
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| } else if (node.jjtGetParent() instanceof ASTWhileStatement) {
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| dataFlow.pushOnStack(NodeType.WHILE_LAST_STATEMENT, dataFlow.getLast());
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| } else if (node.jjtGetParent() instanceof ASTForStatement) {
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| dataFlow.pushOnStack(NodeType.FOR_END, dataFlow.getLast());
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| } |
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| return data;
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| } |
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| public Object visit(ASTSwitchStatement node, Object data) {
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| if (!(data instanceof Structure)) {
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| return data;
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| } |
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| Structure dataFlow = (Structure) data;
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| super.visit(node, data);
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| dataFlow.pushOnStack(NodeType.SWITCH_END, dataFlow.getLast());
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| return data;
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| } |
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| public Object visit(ASTSwitchLabel node, Object data) {
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| if (!(data instanceof Structure)) {
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| return data;
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| } |
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| Structure dataFlow = (Structure) data;
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| |
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| if (node.jjtGetNumChildren() == 0) {
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| dataFlow.pushOnStack(NodeType.SWITCH_LAST_DEFAULT_STATEMENT, dataFlow.getLast());
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| } else { |
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| dataFlow.pushOnStack(NodeType.CASE_LAST_STATEMENT, dataFlow.getLast());
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| } |
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| return data;
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| } |
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| public Object visit(ASTBreakStatement node, Object data) {
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| if (!(data instanceof Structure)) {
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| return data;
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| } |
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| Structure dataFlow = (Structure) data;
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| dataFlow.createNewNode(node);
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| dataFlow.pushOnStack(NodeType.BREAK_STATEMENT, dataFlow.getLast());
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| return super.visit(node, data);
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| } |
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| public Object visit(ASTContinueStatement node, Object data) {
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| if (!(data instanceof Structure)) {
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| return data;
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| } |
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| Structure dataFlow = (Structure) data;
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| dataFlow.createNewNode(node);
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| dataFlow.pushOnStack(NodeType.CONTINUE_STATEMENT, dataFlow.getLast());
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| return super.visit(node, data);
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| } |
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| |
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0
| public Object visit(ASTReturnStatement node, Object data) {
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0
| if (!(data instanceof Structure)) {
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| return data;
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| } |
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| Structure dataFlow = (Structure) data;
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213 |
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| dataFlow.createNewNode(node);
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| dataFlow.pushOnStack(NodeType.RETURN_STATEMENT, dataFlow.getLast());
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| return super.visit(node, data);
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| } |
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| private void addForExpressionNode(SimpleNode node, Structure dataFlow) {
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| ASTForStatement parent = (ASTForStatement) node.jjtGetParent();
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| boolean hasExpressionChild = false;
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| boolean hasForInitNode = false;
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| boolean hasForUpdateNode = false;
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| for (int i = 0; i < parent.jjtGetNumChildren(); i++) {
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| if (parent.jjtGetChild(i) instanceof ASTExpression)
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| hasExpressionChild = true;
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| else if (parent.jjtGetChild(i) instanceof ASTForUpdate)
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| hasForUpdateNode = true;
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233 |
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| else if (parent.jjtGetChild(i) instanceof ASTForInit)
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| hasForInitNode = true;
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| } |
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| if (!hasExpressionChild) {
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237 |
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| if (node instanceof ASTForInit) {
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2
| dataFlow.createNewNode(node);
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239 |
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| dataFlow.pushOnStack(NodeType.FOR_EXPR, dataFlow.getLast());
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| } else if (node instanceof ASTForUpdate) {
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241 |
2
| if (!hasForInitNode) {
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| dataFlow.createNewNode(node);
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| dataFlow.pushOnStack(NodeType.FOR_EXPR, dataFlow.getLast());
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| } |
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5
| } else if (node instanceof ASTStatement) {
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246 |
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| if (!hasForInitNode && !hasForUpdateNode) {
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2
| dataFlow.createNewNode(node);
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2
| dataFlow.pushOnStack(NodeType.FOR_EXPR, dataFlow.getLast());
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| } |
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| } |
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| } |
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| } |
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| } |