本文整理了Java中net.sourceforge.pmd.lang.ast.Node.getFirstChildOfType()方法的一些代码示例，展示了Node.getFirstChildOfType()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.getFirstChildOfType()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：getFirstChildOfType

Node.getFirstChildOfType介绍

[英]Traverses the children to find the first instance of type childType.
[中]遍历子对象以查找childType类型的第一个实例。

代码示例

代码示例来源：origin: pmd/pmd

private boolean hasElseOrElseIf(final Node parentIfNode) {
  return parentIfNode.getFirstChildOfType(ASTElseStatement.class) != null
      || parentIfNode.getFirstChildOfType(ASTElseIfStatement.class) != null;
}

代码示例来源：origin: pmd/pmd

/**
 * Gets the first child, first grand child, ... of the given types.
 * The children must follow the given order of types
 *
 * @param root the node from where to start the search
 * @param childrenTypes the list of types
 * @param <N> should match the last type of childrenType, otherwise you'll get a ClassCastException
 * @return the found child node or <code>null</code>
 */
@SafeVarargs
private static <N extends Node> N getFirstChild(Node root, Class<? extends Node> ... childrenTypes) {
  Node current = root;
  for (Class<? extends Node> clazz : childrenTypes) {
    Node child = current.getFirstChildOfType(clazz);
    if (child != null) {
      current = child;
    } else {
      return null;
    }
  }
  @SuppressWarnings("unchecked")
  N result = (N) current;
  return result;
}

代码示例来源：origin: pmd/pmd

public boolean isAnonymousClass() {
  return jjtGetParent().getFirstChildOfType(ASTClassOrInterfaceBody.class) != null;
}

代码示例来源：origin: pmd/pmd

/**
 * Returns the the first Class declaration around the node.
 *
 * @param node The node with the enclosing Class declaration.
 *
 * @return The JavaTypeDefinition of the enclosing Class declaration.
 */
private TypeNode getEnclosingTypeDeclaration(Node node) {
  Node previousNode = null;
  while (node != null) {
    if (node instanceof ASTClassOrInterfaceDeclaration) {
      return (TypeNode) node;
      // anonymous class declaration
    } else if (node instanceof ASTAllocationExpression // is anonymous class declaration
        && node.getFirstChildOfType(ASTArrayDimsAndInits.class) == null // array cant be anonymous
        && !(previousNode instanceof ASTArguments)) { // we might come out of the constructor
      return (TypeNode) node;
    }
    previousNode = node;
    node = node.jjtGetParent();
  }
  return null;
}

代码示例来源：origin: pmd/pmd

/**
 * Search the list of thrown exceptions for Exception
 */
private void checkExceptions(Node method, Object o) {
  List<ASTName> exceptionList = Collections.emptyList();
  ASTNameList nameList = method.getFirstChildOfType(ASTNameList.class);
  if (nameList != null) {
    exceptionList = nameList.findDescendantsOfType(ASTName.class);
  }
  if (!exceptionList.isEmpty()) {
    evaluateExceptions(exceptionList, o);
  }
}

代码示例来源：origin: pmd/pmd

private ASTClassOrInterfaceType getTypeOfPrimaryPrefix(ASTPrimarySuffix node) {
    return node.jjtGetParent().getFirstChildOfType(ASTPrimaryPrefix.class)
        .getFirstDescendantOfType(ASTClassOrInterfaceType.class);
  }
}

代码示例来源：origin: pmd/pmd

private boolean isLocalVariableTypeInferred() {
  if (isResourceDeclaration()) {
    // covers "var" in try-with-resources
    return jjtGetParent().getFirstChildOfType(ASTType.class) == null;
  } else if (getNthParent(2) instanceof ASTLocalVariableDeclaration) {
    // covers "var" as local variables and in for statements
    return getNthParent(2).getFirstChildOfType(ASTType.class) == null;
  }
  return false;
}

代码示例来源：origin: pmd/pmd

private boolean isLambdaTypeInferred() {
  return getNthParent(3) instanceof ASTLambdaExpression
      && jjtGetParent().getFirstChildOfType(ASTType.class) == null;
}

代码示例来源：origin: pmd/pmd

public static List<JavaTypeDefinition> getMethodExplicitTypeArugments(Node node) {
    ASTMemberSelector memberSelector = node.getFirstChildOfType(ASTMemberSelector.class);
    if (memberSelector == null) {
      return Collections.emptyList();
    }

    ASTTypeArguments typeArguments = memberSelector.getFirstChildOfType(ASTTypeArguments.class);
    if (typeArguments == null) {
      return Collections.emptyList();
    }

    List<JavaTypeDefinition> result = new ArrayList<>();

    for (int childIndex = 0; childIndex < typeArguments.jjtGetNumChildren(); ++childIndex) {
      result.add(((TypeNode) typeArguments.jjtGetChild(childIndex)).getTypeDefinition());
    }

    return result;
  }
}

代码示例来源：origin: pmd/pmd

public ASTDatatype getTypeNode() {
  if (jjtGetParent() instanceof ASTFormalParameter) {
    return ((ASTFormalParameter) jjtGetParent()).getTypeNode();
  } else {
    Node n = jjtGetParent().jjtGetParent();
    if (n instanceof ASTVariableOrConstantDeclaration || n instanceof ASTFieldDeclaration) {
      return n.getFirstChildOfType(ASTDatatype.class);
    }
  }
  throw new RuntimeException(
      "Don't know how to get the type for anything other than ASTLocalVariableDeclaration/ASTFormalParameter/ASTFieldDeclaration");
}

代码示例来源：origin: pmd/pmd

/**
 * Gets a list of NameDeclarations for all the fields that have type
 * ExpectedException and have a Rule annotation.
 *
 * @param classScope
 *            The class scope to search for
 * @return See description
 */
private Map<String, List<NameOccurrence>> getRuleAnnotatedExpectedExceptions(Scope classScope) {
  Map<String, List<NameOccurrence>> result = new HashMap<>();
  Map<NameDeclaration, List<NameOccurrence>> decls = classScope.getDeclarations();
  for (Map.Entry<NameDeclaration, List<NameOccurrence>> entry : decls.entrySet()) {
    Node parent = entry.getKey().getNode().jjtGetParent().jjtGetParent().jjtGetParent();
    if (parent.hasDescendantOfType(ASTMarkerAnnotation.class)
        && parent.getFirstChildOfType(ASTFieldDeclaration.class) != null) {
      String annot = parent.getFirstDescendantOfType(ASTMarkerAnnotation.class).jjtGetChild(0).getImage();
      if (!"Rule".equals(annot) && !"org.junit.Rule".equals(annot)) {
        continue;
      }
      Node type = parent.getFirstDescendantOfType(ASTReferenceType.class);
      if (!"ExpectedException".equals(type.jjtGetChild(0).getImage())) {
        continue;
      }
      result.put(entry.getKey().getName(), entry.getValue());
    }
  }
  return result;
}

代码示例来源：origin: pmd/pmd

/**
 * Report usages of assignments.
 *
 * @param checkIncrement true: check only '+=' and '-=',
 *                       false: check all other assignments
 * @param ignoreFlags    which statements should be ignored
 */
private void checkAssignments(Object data, Set<String> loopVariables, ASTStatement loopBody, boolean checkIncrement, IgnoreFlags... ignoreFlags) {
  for (ASTAssignmentOperator operator : loopBody.findDescendantsOfType(ASTAssignmentOperator.class)) {
    // check if the current operator is an assign-increment or assign-decrement operator
    final String operatorImage = operator.getImage();
    final boolean isIncrement = "+=".equals(operatorImage) || "-=".equals(operatorImage);
    if (isIncrement != checkIncrement) {
      // wrong type of operator
      continue;
    }
    if (ignoreNode(operator, loopBody, ignoreFlags)) {
      continue;
    }
    final ASTPrimaryExpression primaryExpression = operator.jjtGetParent().getFirstChildOfType(ASTPrimaryExpression.class);
    checkVariable(data, loopVariables, singleVariableName(primaryExpression));
  }
}

代码示例来源：origin: pmd/pmd

/**
 * This method can be called on a prefix
 */
private ASTArguments getSuffixMethodArgs(Node node) {
  Node prefix = node.jjtGetParent();
  if (prefix instanceof ASTPrimaryPrefix
      && prefix.jjtGetParent().jjtGetNumChildren() >= 2) {
    return prefix.jjtGetParent().jjtGetChild(1).getFirstChildOfType(ASTArguments.class);
  }
  return null;
}

代码示例来源：origin: pmd/pmd

private ASTClassOrInterfaceType getTypeOfMethodCall(ASTPrimarySuffix node) {
  ASTClassOrInterfaceType type = null;
  ASTName methodName = node.jjtGetParent().getFirstChildOfType(ASTPrimaryPrefix.class)
      .getFirstChildOfType(ASTName.class);
  if (methodName != null) {
    ClassScope classScope = node.getScope().getEnclosingScope(ClassScope.class);
    Map<MethodNameDeclaration, List<NameOccurrence>> methods = classScope.getMethodDeclarations();
    for (Map.Entry<MethodNameDeclaration, List<NameOccurrence>> e : methods.entrySet()) {
      if (e.getKey().getName().equals(methodName.getImage())) {
        type = e.getKey().getNode().getFirstParentOfType(ASTMethodDeclaration.class)
            .getFirstChildOfType(ASTResultType.class)
            .getFirstDescendantOfType(ASTClassOrInterfaceType.class);
        break;
      }
    }
  }
  return type;
}

代码示例来源：origin: pmd/pmd

private ASTTypeParameter getTypeParameterDeclaration(Node startNode, String image) {
  for (Node parent = startNode.jjtGetParent(); parent != null; parent = parent.jjtGetParent()) {
    ASTTypeParameters typeParameters = null;
    if (parent instanceof ASTTypeParameters) { // if type parameter defined in the same < >
      typeParameters = (ASTTypeParameters) parent;
    } else if (parent instanceof ASTConstructorDeclaration
        || parent instanceof ASTMethodDeclaration
        || parent instanceof ASTClassOrInterfaceDeclaration) {
      typeParameters = parent.getFirstChildOfType(ASTTypeParameters.class);
    }
    if (typeParameters != null) {
      for (int index = 0; index < typeParameters.jjtGetNumChildren(); ++index) {
        String imageToCompareTo = typeParameters.jjtGetChild(index).getImage();
        if (imageToCompareTo != null && imageToCompareTo.equals(image)) {
          return (ASTTypeParameter) typeParameters.jjtGetChild(index);
        }
      }
    }
  }
  return null;
}

代码示例来源：origin: pmd/pmd

private void setVariableNameIfExists(Node node) {
    if (node instanceof ASTFieldDeclaration) {
      variableName = getVariableNames((ASTFieldDeclaration) node);
    } else if (node instanceof ASTLocalVariableDeclaration) {
      variableName = getVariableNames((ASTLocalVariableDeclaration) node);
    } else if (node instanceof ASTVariableDeclarator) {
      variableName = node.jjtGetChild(0).getImage();
    } else if (node instanceof ASTVariableDeclaratorId) {
      variableName = node.getImage();
    } else if (node instanceof ASTFormalParameter) {
      setVariableNameIfExists(node.getFirstChildOfType(ASTVariableDeclaratorId.class));
    } else {
      variableName = "";
    }
  }
}

代码示例来源：origin: pmd/pmd

private boolean doesNodeContainJUnitAnnotation(Node node, String annotationTypeClassName) {
  List<ASTAnnotation> annotations = node.findDescendantsOfType(ASTAnnotation.class);
  for (ASTAnnotation annotation : annotations) {
    Node annotationTypeNode = annotation.jjtGetChild(0);
    TypeNode annotationType = (TypeNode) annotationTypeNode;
    if (annotationType.getType() == null) {
      ASTName name = annotationTypeNode.getFirstChildOfType(ASTName.class);
      if (name != null && (name.hasImageEqualTo("Test") || name.hasImageEqualTo(annotationTypeClassName))) {
        return true;
      }
    } else if (TypeHelper.isA(annotationType, annotationTypeClassName)) {
      return true;
    }
  }
  return false;
}

代码示例来源：origin: pmd/pmd

public void check(Object ctx, ASTArguments node) {
  if (node.getArgumentCount() == argumentsCount
      && node.getNthParent(2) instanceof ASTPrimaryExpression) {
    ASTPrimaryPrefix primaryPrefix = node.getNthParent(2).getFirstChildOfType(ASTPrimaryPrefix.class);
    if (primaryPrefix != null) {
      ASTName name = primaryPrefix.getFirstChildOfType(ASTName.class);
      if (name != null && name.hasImageEqualTo(this.assertionName)) {
        if (isException(node)) {
          return;
        }
        JUnitAssertionsShouldIncludeMessageRule.this.addViolation(ctx, name);
      }
    }
  }
}

代码示例来源：origin: pmd/pmd

private int getConstructorAppendsLength(final Node node) {
  final Node parent = node.getFirstParentOfType(ASTVariableDeclarator.class);
  int size = 0;
  if (parent != null) {
    final Node initializer = parent.getFirstChildOfType(ASTVariableInitializer.class);
    if (initializer != null) {
      final Node primExp = initializer.getFirstDescendantOfType(ASTPrimaryExpression.class);
      if (primExp != null) {
        for (int i = 0; i < primExp.jjtGetNumChildren(); i++) {
          final Node sn = primExp.jjtGetChild(i);
          if (!(sn instanceof ASTPrimarySuffix) || sn.getImage() != null) {
            continue;
          }
          size += processNode(sn);
        }
      }
    }
  }
  return size;
}

代码示例来源：origin: pmd/pmd

@Override
public Object visit(ASTVariableDeclarator node, Object data) {
  if (count > 1) {
    return super.visit(node, data);
  }
  ASTType type = node.jjtGetParent().getFirstChildOfType(ASTType.class);
  if (type != null) {
    Node reftypeNode = type.jjtGetChild(0);
    if (reftypeNode instanceof ASTReferenceType) {
      Node classOrIntType = reftypeNode.jjtGetChild(0);
      if (classOrIntType instanceof ASTClassOrInterfaceType) {
        Class<?> clazzType = ((ASTClassOrInterfaceType) classOrIntType).getType();
        if (clazzType != null
            && (TypeHelper.isA((ASTClassOrInterfaceType) classOrIntType, LOG4J_LOGGER_NAME)
              || TypeHelper.isA((ASTClassOrInterfaceType) classOrIntType, JAVA_LOGGER_NAME)
              || TypeHelper.isA((ASTClassOrInterfaceType) classOrIntType, SLF4J_LOGGER_NAME))
            || clazzType == null && "Logger".equals(classOrIntType.getImage())) {
          ++count;
        }
      }
    }
  }
  return super.visit(node, data);
}