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The CodeNarc project provides a static analysis tool for Groovy code.
package org.codenarc.rule;
import org.codehaus.groovy.ast.*;
import org.codehaus.groovy.ast.expr.*;
import org.codehaus.groovy.ast.stmt.*;
import org.codehaus.groovy.classgen.BytecodeExpression;
import org.codehaus.groovy.control.SourceUnit;
import org.codenarc.source.SourceCode;
import org.codenarc.util.AstUtil;
import java.util.ArrayList;
import java.util.List;
/**
* This is the base class for AST Visitors that only need to visit the methods of
* a class. It will not visit anything except the MethodNode. It is much faster than
* the alternative of visiting the whole class.
*
* When you override visitMethod(MethodNode), there is no need to invoke the super method.
*/
public class AbstractMethodVisitor extends ClassCodeVisitorSupport implements AstVisitor {
private Rule rule;
private SourceCode sourceCode;
private final List violations = new ArrayList();
private ClassNode currentClassNode = null;
@Override
public void visitClass(ClassNode node) {
currentClassNode = node;
for (MethodNode method : node.getMethods()) {
visitMethod(method);
}
currentClassNode = null;
}
protected final ClassNode getCurrentClassNode() {
return currentClassNode;
}
protected final String getCurrentClassName() {
if (currentClassNode == null) {
return "";
}
return currentClassNode.getName();
}
/**
* Add a new Violation to the list of violations found by this visitor.
* Only add the violation if the node lineNumber >= 0.
*
* @param node - the Groovy AST Node
* @param message - the message for the violation; defaults to null
*/
protected void addViolation(ASTNode node, String message) {
if (node.getLineNumber() >= 0) {
int lineNumber = AstUtil.findFirstNonAnnotationLine(node, sourceCode);
String sourceLine = sourceCode.line(lineNumber - 1);
Violation violation = new Violation();
violation.setRule(rule);
violation.setLineNumber(lineNumber);
violation.setSourceLine(sourceLine);
violation.setMessage(message);
violations.add(violation);
}
}
/**
* Add a new Violation to the list of violations found by this visitor.
* Only add the violation if the node lineNumber >= 0.
*
* @param node - the Groovy AST Node
* @param message - the message for the violation; defaults to null
*/
protected void addViolation(MethodNode node, String message) {
addViolation((ASTNode) node, String.format(
"Violation in class %s. %s", node.getDeclaringClass().getNameWithoutPackage(), message
));
}
/**
* Add a new Violation to the list of violations found by this visitor.
* Only add the violation if the node lineNumber >= 0.
*
* @param node - the Groovy AST Node
* @param message - the message for the violation; defaults to null
*/
protected void addViolation(ClassNode node, String message) {
addViolation((ASTNode) node, String.format(
"Violation in class %s. %s", node.getNameWithoutPackage(), message
));
}
protected SourceCode getSourceCode() {
return sourceCode;
}
/**
* Set the Rule associated with this visitor
*
* @param rule - the Rule
*/
public void setRule(Rule rule) {
this.rule = rule;
}
/**
* Gets the rule for this visitor.
*
* @return the rule
*/
public Rule getRule() {
return rule;
}
/**
* Set the SourceCode associated with this visitor
*
* @param sourceCode - the SourceCode
*/
public void setSourceCode(SourceCode sourceCode) {
this.sourceCode = sourceCode;
}
/**
* Retrieve the List of Violations resulting from applying this visitor
*
* @return the List of Violations; may be empty
*/
public List getViolations() {
return violations;
}
@Override
public final void visitField(FieldNode node) {
throw new UnsupportedOperationException();
}
@Override
protected final void visitObjectInitializerStatements(ClassNode node) {
throw new UnsupportedOperationException();
}
@Override
protected final SourceUnit getSourceUnit() {
throw new RuntimeException("should never be called");
}
@Override
public final void visitPackage(PackageNode node) {
throw new UnsupportedOperationException();
}
@Override
public final void visitImports(ModuleNode node) {
throw new UnsupportedOperationException();
}
@Override
public final void visitAnnotations(AnnotatedNode node) {
throw new UnsupportedOperationException();
}
@Override
protected final void visitClassCodeContainer(Statement code) {
throw new UnsupportedOperationException();
}
@Override
public final void visitVariableExpression(VariableExpression expression) {
throw new UnsupportedOperationException();
}
@Override
protected final void visitConstructorOrMethod(MethodNode node, boolean isConstructor) {
throw new UnsupportedOperationException();
}
@Override
public final void visitConstructor(ConstructorNode node) {
throw new UnsupportedOperationException();
}
@Override
public final void visitProperty(PropertyNode node) {
throw new UnsupportedOperationException();
}
@Override
public final void addError(String msg, ASTNode expr) {
super.addError(msg, expr);
}
@Override
protected final void visitStatement(Statement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitAssertStatement(AssertStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitBlockStatement(BlockStatement block) {
throw new UnsupportedOperationException();
}
@Override
public final void visitBreakStatement(BreakStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitCaseStatement(CaseStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitCatchStatement(CatchStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitContinueStatement(ContinueStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitDoWhileLoop(DoWhileStatement loop) {
throw new UnsupportedOperationException();
}
@Override
public final void visitExpressionStatement(ExpressionStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitForLoop(ForStatement forLoop) {
throw new UnsupportedOperationException();
}
@Override
public final void visitIfElse(IfStatement ifElse) {
throw new UnsupportedOperationException();
}
@Override
public final void visitReturnStatement(ReturnStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitSwitch(SwitchStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitSynchronizedStatement(SynchronizedStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitThrowStatement(ThrowStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitTryCatchFinally(TryCatchStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitWhileLoop(WhileStatement loop) {
throw new UnsupportedOperationException();
}
@Override
public final void visitEmptyStatement(EmptyStatement statement) {
throw new UnsupportedOperationException();
}
@Override
public final void visitMethodCallExpression(MethodCallExpression call) {
throw new UnsupportedOperationException();
}
@Override
public final void visitStaticMethodCallExpression(StaticMethodCallExpression call) {
throw new UnsupportedOperationException();
}
@Override
public final void visitConstructorCallExpression(ConstructorCallExpression call) {
throw new UnsupportedOperationException();
}
@Override
public final void visitBinaryExpression(BinaryExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitTernaryExpression(TernaryExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitShortTernaryExpression(ElvisOperatorExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitPostfixExpression(PostfixExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitPrefixExpression(PrefixExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitBooleanExpression(BooleanExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitNotExpression(NotExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitClosureExpression(ClosureExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitTupleExpression(TupleExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitListExpression(ListExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitArrayExpression(ArrayExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitMapExpression(MapExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitMapEntryExpression(MapEntryExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitRangeExpression(RangeExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitSpreadExpression(SpreadExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitSpreadMapExpression(SpreadMapExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitMethodPointerExpression(MethodPointerExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitUnaryMinusExpression(UnaryMinusExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitUnaryPlusExpression(UnaryPlusExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitBitwiseNegationExpression(BitwiseNegationExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitCastExpression(CastExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitConstantExpression(ConstantExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitClassExpression(ClassExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitDeclarationExpression(DeclarationExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitPropertyExpression(PropertyExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitAttributeExpression(AttributeExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitFieldExpression(FieldExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitGStringExpression(GStringExpression expression) {
throw new UnsupportedOperationException();
}
@Override
public final void visitListOfExpressions(List list) {
throw new UnsupportedOperationException();
}
@Override
public final void visitArgumentlistExpression(ArgumentListExpression ale) {
throw new UnsupportedOperationException();
}
@Override
public final void visitClosureListExpression(ClosureListExpression cle) {
throw new UnsupportedOperationException();
}
@Override
public final void visitBytecodeExpression(BytecodeExpression cle) {
throw new UnsupportedOperationException();
}
@Override
public void visitMethod(MethodNode node) {
throw new UnsupportedOperationException();
}
}