net.sourceforge.pmd.lang.ast.Node.getFirstDescendantOfType()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.getFirstDescendantOfType()方法的一些代码示例，展示了Node.getFirstDescendantOfType()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.getFirstDescendantOfType()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：getFirstDescendantOfType

Node.getFirstDescendantOfType介绍

[英]Traverses down the tree to find the first descendant instance of type descendantType without crossing find boundaries.
[中]沿树向下遍历，以查找类型为genderantType的第一个子实例，而不跨越查找边界。

代码示例

代码示例来源：origin: pmd/pmd

  1. private boolean isAdditive(Node n) {
  2.   ASTAdditiveExpression add = n.getFirstDescendantOfType(ASTAdditiveExpression.class);
  3.   // if the first descendant additive expression is deeper than 4 levels,
  4.   // it belongs to a nested method call and not anymore to the append
  5.   // argument.
  6.   return add != null && add.getNthParent(4) == n;
  7. }

代码示例来源：origin: pmd/pmd

  1. private int processAdditive(Node sn) {
  2.   ASTAdditiveExpression additive = sn.getFirstDescendantOfType(ASTAdditiveExpression.class);
  3.   if (additive == null) {
  4.     return 0;
  5.   }
  6.   int anticipatedLength = 0;
  7.   for (int ix = 0; ix < additive.jjtGetNumChildren(); ix++) {
  8.     Node childNode = additive.jjtGetChild(ix);
  9.     ASTLiteral literal = childNode.getFirstDescendantOfType(ASTLiteral.class);
  10.     if (literal != null && literal.getImage() != null) {
  11.       anticipatedLength += literal.getImage().length() - 2;
  12.     }
  13.   }
  14.   return anticipatedLength;
  15. }

代码示例来源：origin: pmd/pmd

  1. private String getExpressionVarName(Node e) {
  2.   String assignedVar = getFirstNameImage(e);
  3.   if (assignedVar == null) {
  4.     ASTPrimarySuffix suffix = e.getFirstDescendantOfType(ASTPrimarySuffix.class);
  5.     if (suffix != null) {
  6.       assignedVar = suffix.getImage();
  7.       ASTPrimaryPrefix prefix = e.getFirstDescendantOfType(ASTPrimaryPrefix.class);
  8.       if (prefix != null) {
  9.         if (prefix.usesThisModifier()) {
  10.           assignedVar = "this." + assignedVar;
  11.         } else if (prefix.usesSuperModifier()) {
  12.           assignedVar = "super." + assignedVar;
  13.         }
  14.       }
  15.     }
  16.   }
  17.   return assignedVar;
  18. }

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. /**
  2.  * Gets the image of the ASTName node found by
  3.  * {@link Node#getFirstDescendantOfType(Class)} if it is the greatgrandchild
  4.  * of the given node.
  5.  *
  6.  * E.g.
  7.  * 
  8.  * <pre>
  9.  * n = Expression || StatementExpression
  10.  *       PrimaryExpression
  11.  *         PrimaryPrefix
  12.  *           Name
  13.  * </pre>
  14.  *
  15.  * @param n
  16.  *            the node to search
  17.  * @return the image of the first ASTName or <code>null</code>
  18.  */
  19. protected String getFirstNameImage(Node n) {
  20.   ASTName name = n.getFirstDescendantOfType(ASTName.class);
  21.   if (name != null && name.getNthParent(3) == n) {
  22.     return name.getImage();
  23.   }
  24.   return null;
  25. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Determines the log level, that is used. It is either the called method name
  3.  * itself or - in case java util logging is used, then it is the first argument of
  4.  * the method call (if it exists).
  5.  *
  6.  * @param node the method call
  7.  * @param methodCallName the called method name previously determined
  8.  * @return the log level or <code>null</code> if it could not be determined
  9.  */
  10. private String getLogLevelName(Node node, String methodCallName) {
  11.   if (!JAVA_UTIL_LOG_METHOD.equals(methodCallName) && !JAVA_UTIL_LOG_GUARD_METHOD.equals(methodCallName)) {
  12.     return methodCallName;
  13.   }
  14.   String logLevel = null;
  15.   ASTPrimarySuffix suffix = node.getFirstDescendantOfType(ASTPrimarySuffix.class);
  16.   if (suffix != null) {
  17.     ASTArgumentList argumentList = suffix.getFirstDescendantOfType(ASTArgumentList.class);
  18.     if (argumentList != null && argumentList.jjtGetNumChildren() > 0) {
  19.       // at least one argument - the log level. If the method call is "log", then a message might follow
  20.       ASTName name = GuardLogStatementRule.<ASTName>getFirstChild(argumentList.jjtGetChild(0),
  21.           ASTPrimaryExpression.class, ASTPrimaryPrefix.class, ASTName.class);
  22.       String lastPart = getLastPartOfName(name);
  23.       lastPart = lastPart.toLowerCase(Locale.ROOT);
  24.       if (!lastPart.isEmpty()) {
  25.         logLevel = lastPart;
  26.       }
  27.     }
  28.   }
  29.   return logLevel;
  30. }

代码示例来源：origin: pmd/pmd

  1. private Entry<VariableNameDeclaration, List<NameOccurrence>> getIterableDeclOfIteratorLoop(VariableNameDeclaration indexDecl, Scope scope) {
  2.   Node initializer = indexDecl.getNode().getFirstParentOfType(ASTVariableDeclarator.class)
  3.                 .getFirstChildOfType(ASTVariableInitializer.class);
  4.   if (initializer == null) {
  5.     return null;
  6.   }
  7.   ASTName nameNode = initializer.getFirstDescendantOfType(ASTName.class);
  8.   if (nameNode == null) {
  9.     // TODO : This can happen if we are calling a local / statically imported method that returns the iterable - currently unhandled
  10.     return null;
  11.   }
  12.   String name = nameNode.getImage();
  13.   int dotIndex = name.indexOf('.');
  14.   if (dotIndex > 0) {
  15.     name = name.substring(0, dotIndex);
  16.   }
  17.   return findDeclaration(name, scope);
  18. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Gets a list of NameDeclarations for all the fields that have type
  3.  * ExpectedException and have a Rule annotation.
  4.  *
  5.  * @param classScope
  6.  *            The class scope to search for
  7.  * @return See description
  8.  */
  9. private Map<String, List<NameOccurrence>> getRuleAnnotatedExpectedExceptions(Scope classScope) {
  10.   Map<String, List<NameOccurrence>> result = new HashMap<>();
  11.   Map<NameDeclaration, List<NameOccurrence>> decls = classScope.getDeclarations();
  12.   for (Map.Entry<NameDeclaration, List<NameOccurrence>> entry : decls.entrySet()) {
  13.     Node parent = entry.getKey().getNode().jjtGetParent().jjtGetParent().jjtGetParent();
  14.     if (parent.hasDescendantOfType(ASTMarkerAnnotation.class)
  15.         && parent.getFirstChildOfType(ASTFieldDeclaration.class) != null) {
  16.       String annot = parent.getFirstDescendantOfType(ASTMarkerAnnotation.class).jjtGetChild(0).getImage();
  17.       if (!"Rule".equals(annot) && !"org.junit.Rule".equals(annot)) {
  18.         continue;
  19.       }
  20.       Node type = parent.getFirstDescendantOfType(ASTReferenceType.class);
  21.       if (!"ExpectedException".equals(type.jjtGetChild(0).getImage())) {
  22.         continue;
  23.       }
  24.       result.put(entry.getKey().getName(), entry.getValue());
  25.     }
  26.   }
  27.   return result;
  28. }

代码示例来源：origin: pmd/pmd

  1. private Object process(Node node, Object data) {
  2.     ASTClassOrInterfaceType cit = node.getFirstDescendantOfType(ASTClassOrInterfaceType.class);
  3.     if (cit == null || !implClassNames.contains(cit.getImage())) {
  4.       return data;
  5.     }
  6.     cit = cit.getFirstDescendantOfType(ASTClassOrInterfaceType.class);
  7.     if (cit == null) {
  8.       return data;
  9.     }
  10.     ASTVariableDeclaratorId decl = node.getFirstDescendantOfType(ASTVariableDeclaratorId.class);
  11.     List<NameOccurrence> usages = decl.getUsages();
  12.     for (NameOccurrence no : usages) {
  13.       ASTName name = (ASTName) no.getLocation();
  14.       Node n = name.jjtGetParent().jjtGetParent().jjtGetParent();
  15.       if (n instanceof ASTCastExpression) {
  16.         addViolation(data, n);
  17.       }
  18.     }
  19.     return null;
  20.   }
  21. }

代码示例来源：origin: pmd/pmd

  1. @Override
  2. public Object visit(ASTClassOrInterfaceBodyDeclaration node, Object data) {
  3.   boolean inAnnotation = false;
  4.   for (int i = 0; i < node.jjtGetNumChildren(); i++) {
  5.     Node child = node.jjtGetChild(i);
  6.     if (child instanceof ASTAnnotation) {
  7.       ASTName annotationName = child.getFirstDescendantOfType(ASTName.class);
  8.       if ("Test".equals(annotationName.getImage())) {
  9.         inAnnotation = true;
  10.         continue;
  11.       }
  12.     }
  13.     if (child instanceof ASTMethodDeclaration) {
  14.       boolean isJUnitMethod = isJUnitMethod((ASTMethodDeclaration) child, data);
  15.       if (inAnnotation || isJUnitMethod) {
  16.         List<Node> found = new ArrayList<>();
  17.         found.addAll((List<Node>) visit((ASTMethodDeclaration) child, data));
  18.         for (Node name : found) {
  19.           addViolation(data, name);
  20.         }
  21.       }
  22.     }
  23.     inAnnotation = false;
  24.   }
  25.   return super.visit(node, data);
  26. }

代码示例来源：origin: pmd/pmd

  1. private List<VariableAccess> markUsages(DataFlowNode inode) {
  2.   // undefinitions was once a field... seems like it works fine as a local
  3.   List<VariableAccess> undefinitions = new ArrayList<>();
  4.   Set<Map<NameDeclaration, List<NameOccurrence>>> variableDeclarations = collectDeclarations(inode);
  5.   for (Map<NameDeclaration, List<NameOccurrence>> declarations : variableDeclarations) {
  6.     for (Map.Entry<NameDeclaration, List<NameOccurrence>> entry : declarations.entrySet()) {
  7.       NameDeclaration vnd = entry.getKey();
  8.       if (vnd.getNode().jjtGetParent() instanceof ASTFormalParameter) {
  9.         // no definition/undefinition/references for parameters
  10.         continue;
  11.       } else if (vnd.getNode().jjtGetParent()
  12.           .getFirstDescendantOfType(ASTVariableOrConstantInitializer.class) != null) {
  13.         // add definition for initialized variables
  14.         addVariableAccess(vnd.getNode(), new VariableAccess(VariableAccess.DEFINITION, vnd.getImage()),
  15.             inode.getFlow());
  16.       }
  17.       undefinitions.add(new VariableAccess(VariableAccess.UNDEFINITION, vnd.getImage()));
  18.       for (NameOccurrence occurrence : entry.getValue()) {
  19.         addAccess(occurrence, inode);
  20.       }
  21.     }
  22.   }
  23.   return undefinitions;
  24. }

代码示例来源：origin: pmd/pmd

  1. private int getConstructorAppendsLength(final Node node) {
  2.   final Node parent = node.getFirstParentOfType(ASTVariableDeclarator.class);
  3.   int size = 0;
  4.   if (parent != null) {
  5.     final Node initializer = parent.getFirstChildOfType(ASTVariableInitializer.class);
  6.     if (initializer != null) {
  7.       final Node primExp = initializer.getFirstDescendantOfType(ASTPrimaryExpression.class);
  8.       if (primExp != null) {
  9.         for (int i = 0; i < primExp.jjtGetNumChildren(); i++) {
  10.           final Node sn = primExp.jjtGetChild(i);
  11.           if (!(sn instanceof ASTPrimarySuffix) || sn.getImage() != null) {
  12.             continue;
  13.           }
  14.           size += processNode(sn);
  15.         }
  16.       }
  17.     }
  18.   }
  19.   return size;
  20. }

代码示例来源：origin: pmd/pmd

  1. private int processNode(Node sn) {
  2.   int anticipatedLength = 0;
  3.   if (sn != null) {
  4.     ASTPrimaryPrefix xn = sn.getFirstDescendantOfType(ASTPrimaryPrefix.class);
  5.     if (xn != null) {
  6.       if (xn.jjtGetNumChildren() != 0 && xn.jjtGetChild(0) instanceof ASTLiteral) {

代码示例来源：origin: pmd/pmd

  1. @Override
  2. public Object visit(ASTAllocationExpression node, Object data) {
  3.   ASTClassOrInterfaceType declClassName = node.getFirstChildOfType(ASTClassOrInterfaceType.class);
  4.   if (declClassName != null && TypeHelper.isA(declClassName, javax.crypto.spec.IvParameterSpec.class)) {
  5.     Node firstArgument = null;
  6.     ASTArguments arguments = node.getFirstChildOfType(ASTArguments.class);
  7.     if (arguments.getArgumentCount() > 0) {
  8.       firstArgument = arguments.getFirstChildOfType(ASTArgumentList.class).jjtGetChild(0);
  9.     }
  10.     if (firstArgument != null) {
  11.       ASTPrimaryPrefix prefix = firstArgument.getFirstDescendantOfType(ASTPrimaryPrefix.class);
  12.       validateProperIv(data, prefix);
  13.     }
  14.   }
  15.   return data;
  16. }

代码示例来源：origin: pmd/pmd

  1. @Override
  2. public Object visit(ASTAllocationExpression node, Object data) {
  3.   ASTClassOrInterfaceType declClassName = node.getFirstChildOfType(ASTClassOrInterfaceType.class);
  4.   if (declClassName != null && TypeHelper.isA(declClassName, SECRET_KEY_SPEC)) {
  5.     Node firstArgument = null;
  6.     ASTArguments arguments = node.getFirstChildOfType(ASTArguments.class);
  7.     if (arguments.getArgumentCount() > 0) {
  8.       firstArgument = arguments.getFirstChildOfType(ASTArgumentList.class).jjtGetChild(0);
  9.     }
  10.     if (firstArgument != null) {
  11.       ASTPrimaryPrefix prefix = firstArgument.getFirstDescendantOfType(ASTPrimaryPrefix.class);
  12.       validateProperKeyArgument(data, prefix);
  13.     }
  14.   }
  15.   return data;
  16. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Determine if the constructor contains (or ends with) a String Literal
  3.  *
  4.  * @param node
  5.  * @return 1 if the constructor contains string argument, else 0
  6.  */
  7. private int checkConstructor(ASTVariableDeclaratorId node, Object data) {
  8.   Node parent = node.jjtGetParent();
  9.   if (parent.jjtGetNumChildren() >= 2) {
  10.     ASTAllocationExpression allocationExpression = parent.jjtGetChild(1)
  11.         .getFirstDescendantOfType(ASTAllocationExpression.class);
  12.     ASTArgumentList list = null;
  13.     if (allocationExpression != null) {
  14.       list = allocationExpression.getFirstDescendantOfType(ASTArgumentList.class);
  15.     }
  16.     if (list != null) {
  17.       ASTLiteral literal = list.getFirstDescendantOfType(ASTLiteral.class);
  18.       if (!isAdditive(list) && literal != null && literal.isStringLiteral()) {
  19.         return 1;
  20.       }
  21.       return processAdditive(data, 0, list, node);
  22.     }
  23.   }
  24.   return 0;
  25. }

代码示例来源：origin: pmd/pmd

  1. /**
  2.  * Gets the name of the variable returned. Some examples: <br>
  3.  * for this.foo returns foo <br>
  4.  * for foo returns foo <br>
  5.  * for foo.bar returns foo.bar
  6.  *
  7.  * @param ret
  8.  *            a return statement to evaluate
  9.  * @return the name of the variable associated or <code>null</code> if it
  10.  *         cannot be detected
  11.  */
  12. protected final String getReturnedVariableName(ASTReturnStatement ret) {
  13.   if (hasTernaryCondition(ret) && hasTernaryNullCheck(ret)) {
  14.     return ret.getFirstDescendantOfType(ASTConditionalExpression.class).jjtGetChild(0)
  15.         .getFirstDescendantOfType(ASTName.class).getImage();
  16.   }
  17.   final ASTName n = ret.getFirstDescendantOfType(ASTName.class);
  18.   if (n != null) {
  19.     return n.getImage();
  20.   }
  21.   final ASTPrimarySuffix ps = ret.getFirstDescendantOfType(ASTPrimarySuffix.class);
  22.   if (ps != null) {
  23.     return ps.getImage();
  24.   }
  25.   return null;
  26. }

代码示例来源：origin: pmd/pmd

  1. for (int a = 0; a < argumentList.jjtGetNumChildren(); a++) {
  2.   Node expression = argumentList.jjtGetChild(a);
  3.   ASTPrimaryPrefix arg = expression.getFirstDescendantOfType(ASTPrimaryPrefix.class);
  4.   String type = "<unknown>";
  5.   if (arg != null && arg.jjtGetNumChildren() > 0) {

代码示例来源：origin: pmd/pmd

  1. private int processAdditive(Object data, int concurrentCount, Node sn, Node rootNode) {
  2.   ASTAdditiveExpression additive = sn.getFirstDescendantOfType(ASTAdditiveExpression.class);

代码示例来源：origin: pmd/pmd

  1. ASTArgumentList args = parent.getFirstDescendantOfType(ASTArgumentList.class);
  2. if (args != null) {
  3.   ASTName arg = args.getFirstDescendantOfType(ASTName.class);
  4.     if (declaration != null) {
  5.       ASTType argType = declaration.getNode().jjtGetParent().jjtGetParent()
  6.           .getFirstDescendantOfType(ASTType.class);
  7.       if (argType != null && argType.jjtGetChild(0) instanceof ASTReferenceType
  8.           && ((ASTReferenceType) argType.jjtGetChild(0)).isArray()) {

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