Java 类com.intellij.psi.impl.source.tree.ChildRole 实例源码

项目：intellij-ce-playground 文件：PsiAnnotationMethodImpl.java

@Override
public PsiAnnotationMemberValue getDefaultValue() {
  final PsiMethodStub stub = getStub();
  if (stub != null) {
    final String text = stub.getDefaultValueText();
    if (StringUtil.isEmpty(text)) return null;

    PsiAnnotationMemberValue value = SoftReference.dereference(myCachedDefaultValue);
    if (value != null) {
      return value;
    }

    value = JavaPsiFacade.getElementFactory(getProject()).createAnnotationFromText("@Foo(" + text + ")", this).findAttributeValue(null);
    myCachedDefaultValue = new SoftReference<PsiAnnotationMemberValue>(value);
    return value;
  }

  myCachedDefaultValue = null;

  final ASTNode node = getNode().findChildByRole(ChildRole.ANNOTATION_DEFAULT_VALUE);
  if (node == null) return null;
  return (PsiAnnotationMemberValue)node.getPsi();
}

项目：intellij-ce-playground 文件：PsiSwitchStatementImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.SWITCH_KEYWORD:
      return findChildByType(SWITCH_KEYWORD);

    case ChildRole.LPARENTH:
      return findChildByType(LPARENTH);

    case ChildRole.SWITCH_EXPRESSION:
      return findChildByType(EXPRESSION_BIT_SET);

    case ChildRole.RPARENTH:
      return findChildByType(RPARENTH);

    case ChildRole.SWITCH_BODY:
      return findChildByType(CODE_BLOCK);
  }
}

项目：intellij-ce-playground 文件：PsiAssertStatementImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == ASSERT_KEYWORD) {
    return ChildRole.ASSERT_KEYWORD;
  }
  else if (i == COLON) {
    return ChildRole.COLON;
  }
  else if (i == SEMICOLON) {
    return ChildRole.CLOSING_SEMICOLON;
  }
  else {
    if (EXPRESSION_BIT_SET.contains(child.getElementType())) {
      int role = getChildRole(child, ChildRole.CONDITION);
      if (role != ChildRoleBase.NONE) return role;
      return ChildRole.ASSERT_DESCRIPTION;
    }
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：PsiSwitchLabelStatementImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == CASE_KEYWORD) {
    return ChildRole.CASE_KEYWORD;
  }
  else if (i == DEFAULT_KEYWORD) {
    return ChildRole.DEFAULT_KEYWORD;
  }
  else if (i == COLON) {
    return ChildRole.COLON;
  }
  else {
    if (EXPRESSION_BIT_SET.contains(child.getElementType())) {
      return ChildRole.CASE_EXPRESSION;
    }
    else {
      return ChildRoleBase.NONE;
    }
  }
}

项目：intellij-ce-playground 文件：PsiLabeledStatementImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.STATEMENT:
      return PsiImplUtil.findStatementChild(this);

    case ChildRole.COLON:
      return findChildByType(COLON);

    case ChildRole.LABEL_NAME:
      return getFirstChildNode();
  }
}

项目：intellij-ce-playground 文件：PsiSuperExpressionImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch (role) {
    default:
      return null;

    case ChildRole.QUALIFIER:
      return getFirstChildNode().getElementType() == JAVA_CODE_REFERENCE ? getFirstChildNode() : null;

    case ChildRole.DOT:
      return findChildByType(DOT);

    case ChildRole.SUPER_KEYWORD:
      return getLastChildNode();
  }
}

项目：intellij-ce-playground 文件：PsiSuperExpressionImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == JAVA_CODE_REFERENCE) {
    return ChildRole.QUALIFIER;
  }
  else if (i == DOT) {
    return ChildRole.DOT;
  }
  else if (i == SUPER_KEYWORD) {
    return ChildRole.SUPER_KEYWORD;
  }
  else {
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：PsiReturnStatementImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == RETURN_KEYWORD) {
    return ChildRole.RETURN_KEYWORD;
  }
  else if (i == SEMICOLON) {
    return ChildRole.CLOSING_SEMICOLON;
  }
  else {
    if (EXPRESSION_BIT_SET.contains(child.getElementType())) {
      return ChildRole.RETURN_VALUE;
    }
    else {
      return ChildRoleBase.NONE;
    }
  }
}

项目：intellij-ce-playground 文件：PsiClassObjectAccessExpressionImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == TYPE) {
    return ChildRole.TYPE;
  }
  else if (i == DOT) {
    return ChildRole.DOT;
  }
  else if (i == CLASS_KEYWORD) {
    return ChildRole.CLASS_KEYWORD;
  }
  else {
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：ImportStatementBaseElement.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == JavaTokenType.IMPORT_KEYWORD) {
    return ChildRole.IMPORT_KEYWORD;
  }
  else if (i == JavaElementType.JAVA_CODE_REFERENCE) {
    return ChildRole.IMPORT_REFERENCE;
  }
  else if (i == JavaTokenType.DOT) {
    return ChildRole.IMPORT_ON_DEMAND_DOT;
  }
  else if (i == JavaTokenType.ASTERISK) {
    return ChildRole.IMPORT_ON_DEMAND_ASTERISK;
  }
  else if (i == JavaTokenType.SEMICOLON) {
    return ChildRole.CLOSING_SEMICOLON;
  }
  else {
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：ImplementsListElement.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == JavaTokenType.IMPLEMENTS_KEYWORD) {
    return ChildRole.IMPLEMENTS_KEYWORD;
  }
  else if (i == JavaTokenType.COMMA) {
    return ChildRole.COMMA;
  }
  else if (i == JavaElementType.JAVA_CODE_REFERENCE) {
    return ChildRole.REFERENCE_IN_LIST;
  }
  else {
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：PsiSynchronizedStatementImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.SYNCHRONIZED_KEYWORD:
      return findChildByType(SYNCHRONIZED_KEYWORD);

    case ChildRole.LPARENTH:
      return findChildByType(LPARENTH);

    case ChildRole.LOCK:
      return findChildByType(EXPRESSION_BIT_SET);

    case ChildRole.RPARENTH:
      return findChildByType(RPARENTH);

    case ChildRole.BLOCK:
      return findChildByType(CODE_BLOCK);
  }
}

项目：intellij-ce-playground 文件：PsiSynchronizedStatementImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == SYNCHRONIZED_KEYWORD) {
    return ChildRole.SYNCHRONIZED_KEYWORD;
  }
  else if (i == LPARENTH) {
    return ChildRole.LPARENTH;
  }
  else if (i == RPARENTH) {
    return ChildRole.RPARENTH;
  }
  else if (i == CODE_BLOCK) {
    return ChildRole.BLOCK;
  }
  else {
    if (EXPRESSION_BIT_SET.contains(child.getElementType())) {
      return ChildRole.LOCK;
    }
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：ParameterElement.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);

  IElementType i = child.getElementType();
  if (i == JavaElementType.MODIFIER_LIST) {
    return ChildRole.MODIFIER_LIST;
  }
  else if (i == JavaElementType.TYPE) {
    return getChildRole(child, ChildRole.TYPE);
  }
  else if (i == JavaTokenType.IDENTIFIER) {
    return getChildRole(child, ChildRole.NAME);
  }
  else {
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：PsiParenthesizedExpressionImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == LPARENTH) {
    return ChildRole.LPARENTH;
  }
  else if (i == RPARENTH) {
    return ChildRole.RPARENTH;
  }
  else {
    if (EXPRESSION_BIT_SET.contains(child.getElementType())) {
      return ChildRole.EXPRESSION;
    }
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：PsiBinaryExpressionImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch (role) {
    default:
      return null;

    case ChildRole.LOPERAND:
      return getFirstChildNode();

    case ChildRole.ROPERAND:
      return ElementType.EXPRESSION_BIT_SET.contains(getLastChildNode().getElementType()) ? getLastChildNode() : null;

    case ChildRole.OPERATION_SIGN:
      return findChildByType(OUR_OPERATIONS_BIT_SET);
  }
}

项目：intellij-ce-playground 文件：PsiCatchSectionImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == PARAMETER) {
    return ChildRole.PARAMETER;
  } else if (i == CODE_BLOCK) {
    return ChildRole.CATCH_BLOCK;
  } else if (i == CATCH_KEYWORD) {
    return ChildRole.CATCH_KEYWORD;
  } else if (i == LPARENTH) {
    return ChildRole.CATCH_BLOCK_PARAMETER_LPARENTH;
  } else if (i == RPARENTH) {
    return ChildRole.CATCH_BLOCK_PARAMETER_RPARENTH;
  }

  return ChildRoleBase.NONE;
}

项目：intellij-ce-playground 文件：ExtendsListElement.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == JavaTokenType.EXTENDS_KEYWORD) {
    return ChildRole.EXTENDS_KEYWORD;
  }
  else if (i == JavaTokenType.COMMA) {
    return ChildRole.COMMA;
  }
  else if (i == JavaElementType.JAVA_CODE_REFERENCE) {
    return ChildRole.REFERENCE_IN_LIST;
  }
  else {
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：PsiThisExpressionImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.QUALIFIER:
      if (getFirstChildNode().getElementType() == JAVA_CODE_REFERENCE){
        return getFirstChildNode();
      }
      else{
        return null;
      }

    case ChildRole.DOT:
      return findChildByType(DOT);

    case ChildRole.THIS_KEYWORD:
      return getLastChildNode();
  }
}

项目：intellij-ce-playground 文件：PsiMethodImpl.java

@Override
public boolean isConstructor() {
  final PsiMethodStub stub = getStub();
  if (stub != null) {
    return stub.isConstructor();
  }

  return getNode().findChildByRole(ChildRole.TYPE) == null;
}

项目：intellij-ce-playground 文件：PsiAssertStatementImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.ASSERT_KEYWORD:
      return findChildByType(ASSERT_KEYWORD);

    case ChildRole.CONDITION:
      return findChildByType(EXPRESSION_BIT_SET);

    case ChildRole.COLON:
      return findChildByType(COLON);

    case ChildRole.ASSERT_DESCRIPTION:
      {
        ASTNode colon = findChildByRole(ChildRole.COLON);
        if (colon == null) return null;
        ASTNode child;
        for(child = colon.getTreeNext(); child != null; child = child.getTreeNext()){
          if (EXPRESSION_BIT_SET.contains(child.getElementType())) break;
        }
        return child;
      }

    case ChildRole.CLOSING_SEMICOLON:
      return findChildByType(SEMICOLON);
  }
}

项目：intellij-ce-playground 文件：PsiConditionalExpressionImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.CONDITION:
      return getFirstChildNode();

    case ChildRole.QUEST:
      return findChildByType(JavaTokenType.QUEST);

    case ChildRole.THEN_EXPRESSION:
      ASTNode quest = findChildByRole(ChildRole.QUEST);
      ASTNode child = quest.getTreeNext();
      while(true){
        if (child == null) return null;
        if (ElementType.EXPRESSION_BIT_SET.contains(child.getElementType())) break;
        child = child.getTreeNext();
      }
      return child;

    case ChildRole.COLON:
      return findChildByType(JavaTokenType.COLON);

    case ChildRole.ELSE_EXPRESSION:
      ASTNode colon = findChildByRole(ChildRole.COLON);
      if (colon == null) return null;
      return ElementType.EXPRESSION_BIT_SET.contains(getLastChildNode().getElementType()) ? getLastChildNode() : null;
  }
}

项目：intellij-ce-playground 文件：PsiPrefixExpressionImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  if (child == getFirstChildNode()) return ChildRole.OPERATION_SIGN;
  if (child == getLastChildNode() && ElementType.EXPRESSION_BIT_SET.contains(child.getElementType())) return ChildRole.OPERAND;
  return ChildRoleBase.NONE;
}

项目：intellij-ce-playground 文件：PsiExpressionListStatementImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.EXPRESSION_LIST:
      return findChildByType(EXPRESSION_LIST);

    case ChildRole.CLOSING_SEMICOLON:
      return TreeUtil.findChildBackward(this, SEMICOLON);
  }
}

项目：intellij-ce-playground 文件：PsiExpressionListStatementImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == EXPRESSION_LIST) {
    return ChildRole.EXPRESSION_LIST;
  }
  else if (i == SEMICOLON) {
    return ChildRole.CLOSING_SEMICOLON;
  }
  else {
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：PsiThrowsListImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.THROWS_KEYWORD:
      return findChildByType(JavaTokenType.THROWS_KEYWORD);
  }
}

项目：intellij-ce-playground 文件：PsiDoWhileStatementImpl.java

@Override
public ASTNode findChildByRole(int role){
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.DO_KEYWORD:
      return findChildByType(DO_KEYWORD);

    case ChildRole.LOOP_BODY:
      return PsiImplUtil.findStatementChild(this);

    case ChildRole.WHILE_KEYWORD:
      return findChildByType(WHILE_KEYWORD);

    case ChildRole.LPARENTH:
      return findChildByType(LPARENTH);

    case ChildRole.CONDITION:
      return findChildByType(EXPRESSION_BIT_SET);

    case ChildRole.RPARENTH:
      return findChildByType(RPARENTH);

    case ChildRole.CLOSING_SEMICOLON:
      return TreeUtil.findChildBackward(this, SEMICOLON);
  }
}

项目：intellij-ce-playground 文件：PsiAssignmentExpressionImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  if (ElementType.EXPRESSION_BIT_SET.contains(child.getElementType())) {
    if (child == getFirstChildNode()) return ChildRole.LOPERAND;
    if (child == getLastChildNode()) return ChildRole.ROPERAND;
    return ChildRoleBase.NONE;
  }
  else if (OUR_OPERATIONS_BIT_SET.contains(child.getElementType())) {
    return ChildRole.OPERATION_SIGN;
  }
  else {
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：PsiLambdaExpressionImpl.java

@Override
public int getChildRole(ASTNode child) {
  final IElementType elType = child.getElementType();
  if (elType == JavaTokenType.ARROW) {
    return ChildRole.ARROW;
  } else if (elType == JavaElementType.PARAMETER_LIST) {
    return ChildRole.PARAMETER_LIST;
  } else if (elType == JavaElementType.CODE_BLOCK) {
    return ChildRole.LBRACE;
  } else {
    return ChildRole.EXPRESSION;
  }
}

项目：intellij-ce-playground 文件：PsiIfStatementImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == IF_KEYWORD) {
    return ChildRole.IF_KEYWORD;
  }
  else if (i == ELSE_KEYWORD) {
    return ChildRole.ELSE_KEYWORD;
  }
  else if (i == LPARENTH) {
    return ChildRole.LPARENTH;
  }
  else if (i == RPARENTH) {
    return ChildRole.RPARENTH;
  }
  else {
    if (ElementType.EXPRESSION_BIT_SET.contains(child.getElementType())) {
      return ChildRole.CONDITION;
    }
    else if (child.getPsi() instanceof PsiStatement) {
      if (findChildByRoleAsPsiElement(ChildRole.THEN_BRANCH) == child) {
        return ChildRole.THEN_BRANCH;
      }
      else {
        return ChildRole.ELSE_BRANCH;
      }
    }
    else {
      return ChildRoleBase.NONE;
    }
  }
}

项目：intellij-ce-playground 文件：PsiClassImpl.java

@Override
public boolean isInterface() {
  final PsiClassStub stub = getStub();
  if (stub != null) {
    return stub.isInterface();
  }

  ASTNode keyword = getNode().findChildByRole(ChildRole.CLASS_OR_INTERFACE_KEYWORD);
  return keyword != null && keyword.getElementType() == JavaTokenType.INTERFACE_KEYWORD;
}

项目：intellij-ce-playground 文件：PsiBlockStatementImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.BLOCK:
      return findChildByType(JavaElementType.CODE_BLOCK);
  }
}

项目：intellij-ce-playground 文件：PsiIfStatementImpl.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.IF_KEYWORD:
      return findChildByType(IF_KEYWORD);

    case ChildRole.LPARENTH:
      return findChildByType(LPARENTH);

    case ChildRole.CONDITION:
      return findChildByType(EXPRESSION_BIT_SET);

    case ChildRole.RPARENTH:
      return findChildByType(RPARENTH);

    case ChildRole.THEN_BRANCH:
      return PsiImplUtil.findStatementChild(this);

    case ChildRole.ELSE_KEYWORD:
      return findChildByType(ELSE_KEYWORD);

    case ChildRole.ELSE_BRANCH:
      {
        ASTNode elseKeyword = findChildByRole(ChildRole.ELSE_KEYWORD);
        if (elseKeyword == null) return null;
        for(ASTNode child = elseKeyword.getTreeNext(); child != null; child = child.getTreeNext()){
          if (child.getPsi() instanceof PsiStatement) return child;
        }
        return null;
      }
  }
}

项目：intellij-ce-playground 文件：PsiBinaryExpressionImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  if (ElementType.EXPRESSION_BIT_SET.contains(child.getElementType())) {
    if (child == getFirstChildNode()) return ChildRole.LOPERAND;
    if (child == getLastChildNode()) return ChildRole.ROPERAND;
    return ChildRoleBase.NONE;
  }
  if (OUR_OPERATIONS_BIT_SET.contains(child.getElementType())) {
    return ChildRole.OPERATION_SIGN;
  }
  return ChildRoleBase.NONE;
}

项目：intellij-ce-playground 文件：ExtendsListElement.java

@Override
public ASTNode findChildByRole(int role) {
  LOG.assertTrue(ChildRole.isUnique(role));
  switch(role){
    default:
      return null;

    case ChildRole.EXTENDS_KEYWORD:
      return findChildByType(JavaTokenType.EXTENDS_KEYWORD);
  }
}

项目：intellij-ce-playground 文件：PsiMethodCallExpressionImpl.java

@Override
@NotNull
public PsiExpressionList getArgumentList() {
  PsiExpressionList list = (PsiExpressionList)findChildByRoleAsPsiElement(ChildRole.ARGUMENT_LIST);
  if (list == null) {
    LOG.error("Invalid PSI for'" + getText() + ". Parent:" + DebugUtil.psiToString(getParent(), false));
  }
  return list;
}

项目：intellij-ce-playground 文件：PsiMethodCallExpressionImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);
  IElementType i = child.getElementType();
  if (i == JavaElementType.EXPRESSION_LIST) {
    return ChildRole.ARGUMENT_LIST;
  }
  else {
    if (ElementType.EXPRESSION_BIT_SET.contains(child.getElementType())) {
      return ChildRole.METHOD_EXPRESSION;
    }
    return ChildRoleBase.NONE;
  }
}

项目：intellij-ce-playground 文件：AnnotationMethodElement.java

@Override
public ASTNode findChildByRole(int role) {
  if (role == ChildRole.ANNOTATION_DEFAULT_VALUE) {
    return findChildByType(ANNOTATION_MEMBER_VALUE_BIT_SET);
  }

  return super.findChildByRole(role);
}

项目：intellij-ce-playground 文件：PsiForeachStatementImpl.java

@Override
public int getChildRole(ASTNode child) {
  LOG.assertTrue(child.getTreeParent() == this);

  IElementType i = child.getElementType();
  if (i == FOR_KEYWORD) {
    return ChildRole.FOR_KEYWORD;
  }
  else if (i == LPARENTH) {
    return ChildRole.LPARENTH;
  }
  else if (i == RPARENTH) {
    return ChildRole.RPARENTH;
  }
  else if (i == PARAMETER) {
    return ChildRole.FOR_ITERATION_PARAMETER;
  }
  else if (i == COLON) {
    return ChildRole.COLON;
  }
  else {
    if (EXPRESSION_BIT_SET.contains(child.getElementType())) {
      return ChildRole.FOR_ITERATED_VALUE;
    }
    else if (child.getPsi() instanceof PsiStatement) {
      return ChildRole.LOOP_BODY;
    }
    else {
      return ChildRoleBase.NONE;
    }
  }
}

项目：intellij-ce-playground 文件：ImportStatementElement.java

@Override
public ASTNode findChildByRole(int role) {
  final ASTNode result = super.findChildByRole(role);
  if (result != null) return result;
  switch (role) {
    default:
      return null;
    case ChildRole.IMPORT_REFERENCE:
      return findChildByType(JavaElementType.JAVA_CODE_REFERENCE);
  }
}