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Java ExpressionUtils.isNullLiteral方法代码示例

本文整理汇总了Java中com.siyeh.ig.psiutils.ExpressionUtils.isNullLiteral方法的典型用法代码示例。如果您正苦于以下问题：Java ExpressionUtils.isNullLiteral方法的具体用法？Java ExpressionUtils.isNullLiteral怎么用？Java ExpressionUtils.isNullLiteral使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类com.siyeh.ig.psiutils.ExpressionUtils的用法示例。


在下文中一共展示了ExpressionUtils.isNullLiteral方法的14个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。

示例1: isNotNullMatcher

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
private static boolean isNotNullMatcher(PsiExpression expr) {
  if (expr instanceof PsiMethodCallExpression) {
    String calledName = ((PsiMethodCallExpression)expr).getMethodExpression().getReferenceName();
    if ("notNullValue".equals(calledName)) {
      return true;
    }
    if ("not".equals(calledName)) {
      PsiExpression[] notArgs = ((PsiMethodCallExpression)expr).getArgumentList().getExpressions();
      if (notArgs.length == 1 &&
          notArgs[0] instanceof PsiMethodCallExpression &&
          "equalTo".equals(((PsiMethodCallExpression)notArgs[0]).getMethodExpression().getReferenceName())) {
        PsiExpression[] equalArgs = ((PsiMethodCallExpression)notArgs[0]).getArgumentList().getExpressions();
        if (equalArgs.length == 1 && ExpressionUtils.isNullLiteral(equalArgs[0])) {
          return true;
        }
      }
    }
  }
  return false;
}
开发者ID:jskierbi，项目名称:intellij-ce-playground，代码行数:21，代码来源:HardcodedContracts.java

示例2: isNullComparison

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
private static boolean isNullComparison(PsiExpression condition, PsiVariable variable) {
  if (!(condition instanceof PsiBinaryExpression)) {
    return false;
  }
  final PsiBinaryExpression comparison = (PsiBinaryExpression)condition;
  final IElementType tokenType = comparison.getOperationTokenType();
  if (!tokenType.equals(JavaTokenType.EQEQ)) {
    return false;
  }
  final PsiExpression lhs = comparison.getLOperand();
  final PsiExpression rhs = comparison.getROperand();
  if (ExpressionUtils.isNullLiteral(rhs)) {
    return VariableAccessUtils.evaluatesToVariable(lhs, variable);
  }
  else if (ExpressionUtils.isNullLiteral(lhs)) {
    return VariableAccessUtils.evaluatesToVariable(rhs, variable);
  }
  return false;
}
开发者ID:jskierbi，项目名称:intellij-ce-playground，代码行数:20，代码来源:NonThreadSafeLazyInitializationInspectionBase.java

示例3: visitBinaryExpression

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
@Override
public void visitBinaryExpression(@NotNull PsiBinaryExpression expression) {
  super.visitBinaryExpression(expression);
  if (!ComparisonUtils.isEqualityComparison(expression)) {
    return;
  }
  final PsiExpression lhs = expression.getLOperand();
  if (!ExpressionUtils.hasStringType(lhs)) {
    return;
  }
  final PsiExpression rhs = expression.getROperand();
  if (rhs == null || !ExpressionUtils.hasStringType(rhs)) {
    return;
  }
  if (ExpressionUtils.isNullLiteral(lhs) || ExpressionUtils.isNullLiteral(rhs)) {
    return;
  }
  final PsiJavaToken sign = expression.getOperationSign();
  registerError(sign);
}
开发者ID:jskierbi，项目名称:intellij-ce-playground，代码行数:21，代码来源:StringEqualityInspection.java

示例4: isNullComparison

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
private static boolean isNullComparison(PsiExpression expression) {
  if (!(expression instanceof PsiBinaryExpression)) {
    return false;
  }
  final PsiBinaryExpression binaryExpression = (PsiBinaryExpression)expression;
  final IElementType tokenType = binaryExpression.getOperationTokenType();
  if (!JavaTokenType.EQEQ.equals(tokenType) && !JavaTokenType.NE.equals(tokenType)) {
    return false;
  }
  final PsiExpression lhs = binaryExpression.getLOperand();
  if (ExpressionUtils.isNullLiteral(lhs)) {
    return true;
  }
  final PsiExpression rhs = binaryExpression.getROperand();
  return ExpressionUtils.isNullLiteral(rhs);
}
开发者ID:jskierbi，项目名称:intellij-ce-playground，代码行数:17，代码来源:CreateAssertIntention.java

示例5: buildReplacement

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
@NonNls
static String buildReplacement(@NotNull PsiExpression operandToReplace, boolean seenString) {
  if (ExpressionUtils.isNullLiteral(operandToReplace)) {
    if (seenString) {
      return "null";
    }
    else {
      return "String.valueOf((Object)null)";
    }
  }
  if (seenString || ExpressionUtils.hasStringType(operandToReplace)) {
    return operandToReplace.getText();
  }
  return "String.valueOf(" + operandToReplace.getText() + ')';
}
开发者ID:jskierbi，项目名称:intellij-ce-playground，代码行数:16，代码来源:TrivialStringConcatenationInspection.java

示例6: visitMethodCallExpression

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
@Override
public void visitMethodCallExpression(
  @NotNull PsiMethodCallExpression call) {
  super.visitMethodCallExpression(call);

  final PsiExpressionList argumentList = call.getArgumentList();
  final PsiExpression[] args = argumentList.getExpressions();
  if (args.length == 0) {
    return;
  }
  final PsiExpression lastArg = args[args.length - 1];
  if (!ExpressionUtils.isNullLiteral(lastArg)) {
    return;
  }
  final PsiMethod method = call.resolveMethod();
  if (method == null) {
    return;
  }
  final PsiParameterList parameterList = method.getParameterList();
  if (parameterList.getParametersCount() != args.length) {
    return;
  }
  final PsiParameter[] parameters = parameterList.getParameters();
  final PsiParameter lastParameter =
    parameters[parameters.length - 1];
  if (!lastParameter.isVarArgs()) {
    return;
  }
  registerError(lastArg);
}
开发者ID:jskierbi，项目名称:intellij-ce-playground，代码行数:31，代码来源:NullArgumentToVariableArgMethodInspection.java

示例7: visitMethodCallExpression

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
@Override
public void visitMethodCallExpression(
  @NotNull PsiMethodCallExpression call) {
  super.visitMethodCallExpression(call);
  if (!MethodCallUtils.isEqualsCall(call)) {
    return;
  }
  final PsiExpressionList argumentList = call.getArgumentList();
  final PsiExpression[] args = argumentList.getExpressions();
  if (args.length == 0 || !ExpressionUtils.isNullLiteral(args[0])) {
    return;
  }
  registerError(args[0]);
}
开发者ID:jskierbi，项目名称:intellij-ce-playground，代码行数:15，代码来源:ObjectEqualsNullInspection.java

示例8: buildReplacement

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
static String buildReplacement(@NotNull PsiExpression operandToReplace, boolean seenString) {
  if (ExpressionUtils.isNullLiteral(operandToReplace)) {
    if (seenString) {
      return "null";
    }
    else {
      return "String.valueOf((Object)null)";
    }
  }
  if (seenString || ExpressionUtils.hasStringType(operandToReplace)) {
    return operandToReplace.getText();
  }
  return "String.valueOf(" + operandToReplace.getText() + ')';
}
开发者ID:lshain-android-source，项目名称:tools-idea，代码行数:15，代码来源:TrivialStringConcatenationInspection.java

示例9: visitMethodCallExpression

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
@Override
public void visitMethodCallExpression(
  @NotNull PsiMethodCallExpression call) {
  super.visitMethodCallExpression(call);

  if (!PsiUtil.isLanguageLevel5OrHigher(call)) {
    return;
  }
  final PsiExpressionList argumentList = call.getArgumentList();
  final PsiExpression[] args = argumentList.getExpressions();
  if (args.length == 0) {
    return;
  }
  final PsiExpression lastArg = args[args.length - 1];
  if (!ExpressionUtils.isNullLiteral(lastArg)) {
    return;
  }
  final PsiMethod method = call.resolveMethod();
  if (method == null) {
    return;
  }
  final PsiParameterList parameterList = method.getParameterList();
  if (parameterList.getParametersCount() != args.length) {
    return;
  }
  final PsiParameter[] parameters = parameterList.getParameters();
  final PsiParameter lastParameter =
    parameters[parameters.length - 1];
  if (!lastParameter.isVarArgs()) {
    return;
  }
  registerError(lastArg);
}
开发者ID:lshain-android-source，项目名称:tools-idea，代码行数:34，代码来源:NullArgumentToVariableArgMethodInspection.java

示例10: isNotNullMatcher

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
private static boolean isNotNullMatcher(PsiExpression expr)
{
	if(expr instanceof PsiMethodCallExpression)
	{
		String calledName = ((PsiMethodCallExpression) expr).getMethodExpression().getReferenceName();
		if("notNullValue".equals(calledName))
		{
			return true;
		}
		if("not".equals(calledName))
		{
			PsiExpression[] notArgs = ((PsiMethodCallExpression) expr).getArgumentList().getExpressions();
			if(notArgs.length == 1 && notArgs[0] instanceof PsiMethodCallExpression && "equalTo".equals(((PsiMethodCallExpression) notArgs[0]).getMethodExpression().getReferenceName()))
			{
				PsiExpression[] equalArgs = ((PsiMethodCallExpression) notArgs[0]).getArgumentList().getExpressions();
				if(equalArgs.length == 1 && ExpressionUtils.isNullLiteral(equalArgs[0]))
				{
					return true;
				}
			}
		}
		if("is".equals(calledName))
		{
			PsiExpression[] args = ((PsiMethodCallExpression) expr).getArgumentList().getExpressions();
			if(args.length == 1)
			{
				return isNotNullMatcher(args[0]);
			}
		}
	}
	return false;
}
开发者ID:consulo，项目名称:consulo-java，代码行数:33，代码来源:HardcodedContracts.java

示例11: isConstantExpression

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
private static boolean isConstantExpression(PsiExpression expression) {
  return ExpressionUtils.isNullLiteral(expression) || PsiUtil.isConstantExpression(expression);
}
开发者ID:jskierbi，项目名称:intellij-ce-playground，代码行数:4，代码来源:ConstantOnRHSOfComparisonInspection.java

示例12: isMoveable

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
protected boolean isMoveable(PsiExpression expression) {
  if (expression == null) {
    return true;
  }
  if (PsiUtil.isConstantExpression(expression) || ExpressionUtils.isNullLiteral(expression)) {
    return true;
  }
  if (expression instanceof PsiNewExpression) {
    final PsiNewExpression newExpression = (PsiNewExpression)expression;
    final PsiExpression[] arrayDimensions = newExpression.getArrayDimensions();
    if (arrayDimensions.length > 0) {
      for (PsiExpression arrayDimension : arrayDimensions) {
        if (!isMoveable(arrayDimension)) {
          return false;
        }
      }
      return true;
    }
    final PsiArrayInitializerExpression arrayInitializer = newExpression.getArrayInitializer();
    boolean result = true;
    if (arrayInitializer != null) {
      final PsiExpression[] initializers = arrayInitializer.getInitializers();
      for (final PsiExpression initializerExpression : initializers) {
        result &= isMoveable(initializerExpression);
      }
    }
    else if (!m_allowConstructorAsInitializer) {
      final PsiType type = newExpression.getType();
      if (!ClassUtils.isImmutable(type)) {
        return false;
      }
    }
    final PsiExpressionList argumentList = newExpression.getArgumentList();
    if (argumentList == null) {
      return result;
    }
    final PsiExpression[] expressions = argumentList.getExpressions();
    for (final PsiExpression argumentExpression : expressions) {
      result &= isMoveable(argumentExpression);
    }
    return result;
  }
  if (expression instanceof PsiReferenceExpression) {
    final PsiReferenceExpression referenceExpression = (PsiReferenceExpression)expression;
    final PsiElement target = referenceExpression.resolve();
    if (!(target instanceof PsiField)) {
      return false;
    }
    final PsiField field = (PsiField)target;
    if (ExpressionUtils.isConstant(field)) {
      return true;
    }
  }
  return false;
}
开发者ID:jskierbi，项目名称:intellij-ce-playground，代码行数:56，代码来源:TooBroadScopeInspectionBase.java

示例13: createNPEFixes

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
@NotNull
protected List<LocalQuickFix> createNPEFixes(PsiExpression qualifier, PsiExpression expression, boolean onTheFly)
{
	qualifier = PsiUtil.deparenthesizeExpression(qualifier);

	final List<LocalQuickFix> fixes = new SmartList<>();
	if(qualifier == null || expression == null)
	{
		return fixes;
	}

	try
	{
		ContainerUtil.addIfNotNull(fixes, StreamFilterNotNullFix.makeFix(qualifier));
		if(isVolatileFieldReference(qualifier))
		{
			ContainerUtil.addIfNotNull(fixes, createIntroduceVariableFix(qualifier));
		}
		else if(!ExpressionUtils.isNullLiteral(qualifier) && !SideEffectChecker.mayHaveSideEffects(qualifier))
		{
			if(PsiUtil.getLanguageLevel(qualifier).isAtLeast(LanguageLevel.JDK_1_4))
			{
				final Project project = qualifier.getProject();
				final PsiElementFactory elementFactory = JavaPsiFacade.getInstance(project).getElementFactory();
				final PsiBinaryExpression binary = (PsiBinaryExpression) elementFactory.createExpressionFromText("a != null", null);
				binary.getLOperand().replace(qualifier);
				if(RefactoringUtil.getParentStatement(expression, false) != null)
				{
					fixes.add(new AddAssertStatementFix(binary));
				}
			}

			if(onTheFly && SurroundWithIfFix.isAvailable(qualifier))
			{
				fixes.add(new SurroundWithIfFix(qualifier));
			}

			if(ReplaceWithTernaryOperatorFix.isAvailable(qualifier, expression))
			{
				fixes.add(new ReplaceWithTernaryOperatorFix(qualifier));
			}
		}

		if(!ExpressionUtils.isNullLiteral(qualifier) && PsiUtil.isLanguageLevel7OrHigher(qualifier))
		{
			fixes.add(new SurroundWithRequireNonNullFix(qualifier));
		}

		ContainerUtil.addIfNotNull(fixes, DfaOptionalSupport.registerReplaceOptionalOfWithOfNullableFix(qualifier));
	}
	catch(IncorrectOperationException e)
	{
		LOG.error(e);
	}
	return fixes;
}
开发者ID:consulo，项目名称:consulo-java，代码行数:57，代码来源:DataFlowInspection.java

示例14: isMoveable

import com.siyeh.ig.psiutils.ExpressionUtils; //导入方法依赖的package包/类
private boolean isMoveable(PsiExpression expression) {
  if (expression == null) {
    return true;
  }
  if (PsiUtil.isConstantExpression(expression) || ExpressionUtils.isNullLiteral(expression)) {
    return true;
  }
  if (expression instanceof PsiNewExpression) {
    final PsiNewExpression newExpression = (PsiNewExpression)expression;
    final PsiExpression[] arrayDimensions = newExpression.getArrayDimensions();
    if (arrayDimensions.length > 0) {
      for (PsiExpression arrayDimension : arrayDimensions) {
        if (!isMoveable(arrayDimension)) {
          return false;
        }
      }
      return true;
    }
    final PsiArrayInitializerExpression arrayInitializer = newExpression.getArrayInitializer();
    boolean result = true;
    if (arrayInitializer != null) {
      final PsiExpression[] initializers = arrayInitializer.getInitializers();
      for (final PsiExpression initializerExpression : initializers) {
        result &= isMoveable(initializerExpression);
      }
    }
    else if (!m_allowConstructorAsInitializer) {
      final PsiType type = newExpression.getType();
      if (!ClassUtils.isImmutable(type)) {
        return false;
      }
    }
    final PsiExpressionList argumentList = newExpression.getArgumentList();
    if (argumentList == null) {
      return result;
    }
    final PsiExpression[] expressions = argumentList.getExpressions();
    for (final PsiExpression argumentExpression : expressions) {
      result &= isMoveable(argumentExpression);
    }
    return result;
  }
  if (expression instanceof PsiReferenceExpression) {
    final PsiReferenceExpression referenceExpression = (PsiReferenceExpression)expression;
    final PsiElement target = referenceExpression.resolve();
    if (!(target instanceof PsiField)) {
      return false;
    }
    final PsiField field = (PsiField)target;
    if (ExpressionUtils.isConstant(field)) {
      return true;
    }
  }
  return false;
}
开发者ID:consulo，项目名称:consulo-java，代码行数:56，代码来源:TooBroadScopeInspection.java


注：本文中的com.siyeh.ig.psiutils.ExpressionUtils.isNullLiteral方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。