net.sourceforge.pmd.lang.ast.Node.findDescendantsOfType()方法的使用及代码示例

x33g5p2x  于2022-01-25 转载在 其他  
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本文整理了Java中net.sourceforge.pmd.lang.ast.Node.findDescendantsOfType()方法的一些代码示例，展示了Node.findDescendantsOfType()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Node.findDescendantsOfType()方法的具体详情如下：
包路径：net.sourceforge.pmd.lang.ast.Node
类名称：Node
方法名：findDescendantsOfType

Node.findDescendantsOfType介绍

[英]Traverses down the tree to find all the descendant instances of type descendantType without crossing find boundaries.
[中]沿树向下遍历以查找类型为DegenantType的所有子体实例，而不跨越查找边界。

代码示例

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Adds all methods called on this instance from within this Node.
  3.  */
  4. private static void addCalledMethodsOfNode(Node node, List<MethodInvocation> calledMethods, String className) {
  5.   List<ASTPrimaryExpression> expressions = new ArrayList<>();
  6.   node.findDescendantsOfType(ASTPrimaryExpression.class, expressions, !(node instanceof AccessNode));
  7.   addCalledMethodsOfNodeImpl(expressions, calledMethods, className);
  8. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Evaluates the number of paths through a boolean expression. This is the total number of {@code &&} and {@code ||}
  3.  * operators appearing in the expression. This is used in the calculation of cyclomatic and n-path complexity.
  4.  *
  5.  * @param expr Expression to analyse
  6.  *
  7.  * @return The number of paths through the expression
  8.  */
  9. public static int booleanExpressionComplexity(Node expr) {
  10.   if (expr == null) {
  11.     return 0;
  12.   }
  13.   List<ASTConditionalAndExpression> andNodes = expr.findDescendantsOfType(ASTConditionalAndExpression.class);
  14.   List<ASTConditionalOrExpression> orNodes = expr.findDescendantsOfType(ASTConditionalOrExpression.class);
  15.   int complexity = 0;
  16.   if (expr instanceof ASTConditionalOrExpression || expr instanceof ASTConditionalAndExpression) {
  17.     complexity++;
  18.   }
  19.   for (ASTConditionalOrExpression element : orNodes) {
  20.     complexity += element.jjtGetNumChildren() - 1;
  21.   }
  22.   for (ASTConditionalAndExpression element : andNodes) {
  23.     complexity += element.jjtGetNumChildren() - 1;
  24.   }
  25.   return complexity;
  26. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Checks to see if there is string concatenation in the node.
  3.  *
  4.  * This method checks if it's additive with respect to the append method
  5.  * only.
  6.  *
  7.  * @param n
  8.  *            Node to check
  9.  * @return true if the node has an additive expression (i.e. "Hello " +
  10.  *         Const.WORLD)
  11.  */
  12. private boolean isAdditive(Node n) {
  13.   List<ASTAdditiveExpression> lstAdditive = n.findDescendantsOfType(ASTAdditiveExpression.class);
  14.   if (lstAdditive.isEmpty()) {
  15.     return false;
  16.   }
  17.   // if there are more than 1 set of arguments above us we're not in the
  18.   // append
  19.   // but a sub-method call
  20.   for (int ix = 0; ix < lstAdditive.size(); ix++) {
  21.     ASTAdditiveExpression expr = lstAdditive.get(ix);
  22.     if (expr.getParentsOfType(ASTArgumentList.class).size() != 1) {
  23.       return false;
  24.     }
  25.   }
  26.   return true;
  27. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Checks whether the given target is in the argument list. If this is the
  3.  * case, then the target (root exception) is used as the cause.
  4.  * 
  5.  * @param target
  6.  * @param baseNode
  7.  */
  8. private boolean checkForTargetUsage(String target, Node baseNode) {
  9.   boolean match = false;
  10.   if (target != null && baseNode != null) {
  11.     // TODO : use Node.findDescendantsOfType(ASTName.class, true) on 7.0.0
  12.     List<ASTName> nameNodes = new ArrayList<>();
  13.     baseNode.findDescendantsOfType(ASTName.class, nameNodes, true);
  14.     for (ASTName nameNode : nameNodes) {
  15.       if (target.equals(nameNode.getImage())) {
  16.         boolean isPartOfStringConcatenation = isStringConcat(nameNode, baseNode);
  17.         if (!isPartOfStringConcatenation) {
  18.           match = true;
  19.           break;
  20.         }
  21.       }
  22.     }
  23.   }
  24.   return match;
  25. }

代码示例来源：origin: pmd/pmd

  1. private boolean isAnnotatedOverride(ASTMethodDeclaration decl) {
  2.   List<ASTMarkerAnnotation> annotations = decl.jjtGetParent().findDescendantsOfType(ASTMarkerAnnotation.class);
  3.   for (ASTMarkerAnnotation ann : annotations) { // TODO consider making a method to get the annotations of a method
  4.     if (ann.getFirstChildOfType(ASTName.class).getImage().equals("Override")) {
  5.       return true;
  6.     }
  7.   }
  8.   return false;
  9. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Adds a VariableAccess to a dataflow node.
  3.  * 
  4.  * @param node
  5.  *            location of the access of a variable
  6.  * @param va
  7.  *            variable access to add
  8.  * @param flow
  9.  *            dataflownodes that can contain the node.
  10.  */
  11. private void addVariableAccess(Node node, VariableAccess va, List<DataFlowNode> flow) {
  12.   // backwards to find the right inode (not a method declaration)
  13.   for (int i = flow.size() - 1; i > 0; i--) {
  14.     DataFlowNode inode = flow.get(i);
  15.     if (inode.getNode() == null) {
  16.       continue;
  17.     }
  18.     List<? extends Node> children = inode.getNode().findDescendantsOfType(node.getClass());
  19.     for (Node n : children) {
  20.       if (node.equals(n)) {
  21.         List<VariableAccess> v = new ArrayList<>();
  22.         v.add(va);
  23.         inode.setVariableAccess(v);
  24.         return;
  25.       }
  26.     }
  27.   }
  28. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Adds a VariableAccess to a dataflow node.
  3.  * 
  4.  * @param node
  5.  *            location of the access of a variable
  6.  * @param va
  7.  *            variable access to add
  8.  * @param flow
  9.  *            dataflownodes that can contain the node.
  10.  */
  11. private void addVariableAccess(Node node, VariableAccess va, List<DataFlowNode> flow) {
  12.   // backwards to find the right inode (not a method declaration)
  13.   for (int i = flow.size() - 1; i > 0; i--) {
  14.     DataFlowNode inode = flow.get(i);
  15.     if (inode.getNode() == null) {
  16.       continue;
  17.     }
  18.     List<? extends Node> children = inode.getNode().findDescendantsOfType(node.getClass());
  19.     for (Node n : children) {
  20.       if (node.equals(n)) {
  21.         List<VariableAccess> v = new ArrayList<>();
  22.         v.add(va);
  23.         inode.setVariableAccess(v);
  24.         return;
  25.       }
  26.     }
  27.   }
  28. }

代码示例来源：origin: pmd/pmd

  1. private boolean isEqualsViolation(Node parent) {
  2.   // 3. child: equals
  3.   if (parent.jjtGetChild(2).hasImageEqualTo("equals")) {
  4.     // 4. child: the arguments of equals, there must be exactly one and
  5.     // it must be ""
  6.     List<ASTArgumentList> argList = parent.jjtGetChild(3).findDescendantsOfType(ASTArgumentList.class);
  7.     if (argList.size() == 1) {
  8.       List<ASTLiteral> literals = argList.get(0).findDescendantsOfType(ASTLiteral.class);
  9.       return literals.size() == 1 && literals.get(0).hasImageEqualTo("\"\"");
  10.     }
  11.   }
  12.   return false;
  13. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * TODO modify usages to use symbol table Tells if the variable name is a
  3.  * local variable declared in the method.
  4.  *
  5.  * @param vn
  6.  *            the variable name
  7.  * @param node
  8.  *            the ASTMethodDeclaration where the local variable name will be
  9.  *            searched
  10.  * @return <code>true</code> if the method declaration contains any local
  11.  *         variable named vn and <code>false</code> in other case
  12.  */
  13. protected boolean isLocalVariable(String vn, Node node) {
  14.   final List<ASTLocalVariableDeclaration> lvars = node.findDescendantsOfType(ASTLocalVariableDeclaration.class);
  15.   if (lvars != null) {
  16.     for (ASTLocalVariableDeclaration lvd : lvars) {
  17.       final ASTVariableDeclaratorId vid = lvd.getFirstDescendantOfType(ASTVariableDeclaratorId.class);
  18.       if (vid != null && vid.hasImageEqualTo(vn)) {
  19.         return true;
  20.       }
  21.     }
  22.   }
  23.   return false;
  24. }

代码示例来源：origin: pmd/pmd

  1. private static List<String> getMethodDeclaratorParameterTypes(Node methodOrConstructorDeclarator) {
  2.   List<ASTFormalParameter> parameters = methodOrConstructorDeclarator
  3.       .findDescendantsOfType(ASTFormalParameter.class);
  4.   List<String> parameterTypes = new ArrayList<>();
  5.   if (parameters != null) {
  6.     for (ASTFormalParameter p : parameters) {
  7.       ASTType type = p.getFirstChildOfType(ASTType.class);
  8.       if (type.jjtGetChild(0) instanceof ASTPrimitiveType) {
  9.         parameterTypes.add(type.jjtGetChild(0).getImage());
  10.       } else if (type.jjtGetChild(0) instanceof ASTReferenceType) {
  11.         parameterTypes.add("ref");
  12.       } else {
  13.         parameterTypes.add("<unkown>");
  14.       }
  15.     }
  16.   }
  17.   return parameterTypes;
  18. }

代码示例来源：origin: pmd/pmd

  1. private int getInitialLength(Node node) {
  2.   Node block = node.getFirstParentOfType(ASTBlockStatement.class);
  3.   if (block == null) {
  4.     block = node.getFirstParentOfType(ASTFieldDeclaration.class);
  5.     if (block == null) {
  6.       block = node.getFirstParentOfType(ASTFormalParameter.class);
  7.     }
  8.   }
  9.   List<ASTLiteral> literals = block.findDescendantsOfType(ASTLiteral.class);
  10.   if (literals.size() == 1) {
  11.     ASTLiteral literal = literals.get(0);
  12.     String str = literal.getImage();
  13.     if (str != null && isStringOrCharLiteral(literal)) {
  14.       return str.length() - 2; // take off the quotes
  15.     }
  16.   }
  17.   return 0;
  18. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Tells if the node contains a Test annotation with an expected exception.
  3.  */
  4. private boolean isExpectAnnotated(Node methodParent) {
  5.   List<ASTNormalAnnotation> annotations = methodParent.findDescendantsOfType(ASTNormalAnnotation.class);
  6.   for (ASTNormalAnnotation annotation : annotations) {
  7.     ASTName name = annotation.getFirstChildOfType(ASTName.class);
  8.     if (name != null && TypeHelper.isA(name, JUNIT4_CLASS_NAME)) {
  9.       List<ASTMemberValuePair> memberValues = annotation.findDescendantsOfType(ASTMemberValuePair.class);
  10.       for (ASTMemberValuePair pair : memberValues) {
  11.         if ("expected".equals(pair.getImage())) {
  12.           return true;
  13.         }
  14.       }
  15.     }
  16.   }
  17.   return false;
  18. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Returns {@code true} if the node has only one {@link ASTConstructorDeclaration}
  3.  * child node and the constructor has empty body or simply invokes the superclass
  4.  * constructor with no arguments.
  5.  *
  6.  * @param node the node to check
  7.  */
  8. private boolean isExplicitDefaultConstructor(Node node) {
  9.   List<ASTConstructorDeclaration> nodes
  10.     = node.findDescendantsOfType(ASTConstructorDeclaration.class);
  11.   if (nodes.size() != 1) {
  12.     return false;
  13.   }
  14.   ASTConstructorDeclaration cdnode = nodes.get(0);
  15.   return cdnode.getParameterCount() == 0 && !hasIgnoredAnnotation(cdnode)
  16.     && !cdnode.hasDescendantOfType(ASTBlockStatement.class) && !cdnode.hasDescendantOfType(ASTNameList.class)
  17.     && hasDefaultConstructorInvocation(cdnode);
  18. }

代码示例来源：origin: pmd/pmd

  1. continue;
  2. List<ASTBlockStatement> blocks = trySt.jjtGetChild(0).findDescendantsOfType(ASTBlockStatement.class);
  3. if (blocks.isEmpty()) {
  4.   continue;

代码示例来源：origin: pmd/pmd

  1. private void recursivelyEvaluateCRUDMethodCalls(final AbstractApexNode<?> self,
  2.     final Set<ASTMethodCallExpression> innerMethodCalls, final ASTBlockStatement blockStatement) {
  3.   if (blockStatement != null) {
  4.     int numberOfStatements = blockStatement.jjtGetNumChildren();
  5.     for (int i = 0; i < numberOfStatements; i++) {
  6.       Node n = blockStatement.jjtGetChild(i);
  7.       if (n instanceof ASTIfElseBlockStatement) {
  8.         List<ASTBlockStatement> innerBlocks = n.findDescendantsOfType(ASTBlockStatement.class);
  9.         for (ASTBlockStatement innerBlock : innerBlocks) {
  10.           recursivelyEvaluateCRUDMethodCalls(self, innerMethodCalls, innerBlock);
  11.         }
  12.       }
  13.       AbstractApexNode<?> match = n.getFirstDescendantOfType(self.getClass());
  14.       if (Objects.equal(match, self)) {
  15.         break;
  16.       }
  17.       ASTMethodCallExpression methodCall = n.getFirstDescendantOfType(ASTMethodCallExpression.class);
  18.       if (methodCall != null) {
  19.         mapCallToMethodDecl(self, innerMethodCalls, Arrays.asList(methodCall));
  20.       }
  21.     }
  22.   }
  23. }

代码示例来源：origin: pmd/pmd

  1. private boolean hasOverrideAnnotation(ASTMethodDeclaration node) {
  2.     int childIndex = node.jjtGetChildIndex();
  3.     for (int i = 0; i < childIndex; i++) {
  4.       Node previousSibling = node.jjtGetParent().jjtGetChild(i);
  5.       List<ASTMarkerAnnotation> annotations = previousSibling.findDescendantsOfType(ASTMarkerAnnotation.class);
  6.       for (ASTMarkerAnnotation annotation : annotations) {
  7.         ASTName name = annotation.getFirstChildOfType(ASTName.class);
  8.         if (name != null && (name.hasImageEqualTo("Override") || name.hasImageEqualTo("java.lang.Override"))) {
  9.           return true;
  10.         }
  11.       }
  12.     }
  13.     return false;
  14.   }
  15. }

代码示例来源：origin: pmd/pmd

  1. private void checkForResources(Node node, Object data) {
  2.   List<ASTLocalVariableDeclaration> vars = node.findDescendantsOfType(ASTLocalVariableDeclaration.class);
  3.   List<ASTVariableDeclaratorId> ids = new ArrayList<>();
  4.   // find all variable references to Connection objects
  5.   for (ASTLocalVariableDeclaration var : vars) {
  6.     ASTType type = var.getTypeNode();
  7.     if (type != null && type.jjtGetChild(0) instanceof ASTReferenceType) {
  8.       ASTReferenceType ref = (ASTReferenceType) type.jjtGetChild(0);
  9.       if (ref.jjtGetChild(0) instanceof ASTClassOrInterfaceType) {
  10.         ASTClassOrInterfaceType clazz = (ASTClassOrInterfaceType) ref.jjtGetChild(0);
  11.         if (clazz.getType() != null && types.contains(clazz.getType().getName())
  12.             || clazz.getType() == null && simpleTypes.contains(toSimpleType(clazz.getImage()))
  13.                 && !clazz.isReferenceToClassSameCompilationUnit()
  14.             || types.contains(clazz.getImage()) && !clazz.isReferenceToClassSameCompilationUnit()) {
  15.           ASTVariableDeclaratorId id = var.getFirstDescendantOfType(ASTVariableDeclaratorId.class);
  16.           ids.add(id);
  17.         }
  18.       }
  19.     }
  20.   }
  21.   // if there are connections, ensure each is closed.
  22.   for (ASTVariableDeclaratorId x : ids) {
  23.     ensureClosed((ASTLocalVariableDeclaration) x.jjtGetParent().jjtGetParent(), x, data);
  24.   }
  25. }

代码示例来源：origin: pmd/pmd

  1. private boolean doesNodeContainJUnitAnnotation(Node node, String annotationTypeClassName) {
  2.   List<ASTAnnotation> annotations = node.findDescendantsOfType(ASTAnnotation.class);
  3.   for (ASTAnnotation annotation : annotations) {
  4.     Node annotationTypeNode = annotation.jjtGetChild(0);
  5.     TypeNode annotationType = (TypeNode) annotationTypeNode;
  6.     if (annotationType.getType() == null) {
  7.       ASTName name = annotationTypeNode.getFirstChildOfType(ASTName.class);
  8.       if (name != null && (name.hasImageEqualTo("Test") || name.hasImageEqualTo(annotationTypeClassName))) {
  9.         return true;
  10.       }
  11.     } else if (TypeHelper.isA(annotationType, annotationTypeClassName)) {
  12.       return true;
  13.     }
  14.   }
  15.   return false;
  16. }

代码示例来源：origin: pmd/pmd

  1. return data;
  2. List<ASTLiteral> literals = parent.findDescendantsOfType(ASTLiteral.class);
  3. for (int l = 0; l < literals.size(); l++) {
  4.   ASTLiteral literal = literals.get(l);

代码示例来源：origin: pmd/pmd

  1. addViolationWithMessage(data, child, child.getXPathNodeName() + " should be on line " + lineNumber);
  2. List<ASTEqualityExpression> conditions = child.findDescendantsOfType(ASTEqualityExpression.class);

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