本文整理汇总了Java中edu.umd.cs.findbugs.util.Util.emptyOrNonnullSingleton方法的典型用法代码示例。如果您正苦于以下问题：Java Util.emptyOrNonnullSingleton方法的具体用法？Java Util.emptyOrNonnullSingleton怎么用？Java Util.emptyOrNonnullSingleton使用的例子？那么, 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edu.umd.cs.findbugs.util.Util的用法示例。
在下文中一共展示了Util.emptyOrNonnullSingleton方法的1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: resolveMethodCallTargets
import edu.umd.cs.findbugs.util.Util; //导入方法依赖的package包/类
/**
* Resolve possible method call targets. This works for both static and
* instance method calls.
*
* @param invokeInstruction
* the InvokeInstruction
* @param typeFrame
* the TypeFrame containing the types of stack values
* @param cpg
* the ConstantPoolGen
* @return Set of methods which might be called
* @throws DataflowAnalysisException
* @throws ClassNotFoundException
*/
public static @Nonnull
Set<XMethod> resolveMethodCallTargets(InvokeInstruction invokeInstruction, TypeFrame typeFrame, ConstantPoolGen cpg)
throws DataflowAnalysisException, ClassNotFoundException {
short opcode = invokeInstruction.getOpcode();
if (opcode == Constants.INVOKESTATIC) {
return Util.emptyOrNonnullSingleton(findInvocationLeastUpperBound(invokeInstruction, cpg, STATIC_METHOD));
}
if (!typeFrame.isValid()) {
return Collections.<XMethod> emptySet();
}
Type receiverType;
boolean receiverTypeIsExact;
if (opcode == Constants.INVOKESPECIAL) {
// invokespecial instructions are dispatched to EXACTLY
// the class specified by the instruction
receiverType = ObjectTypeFactory.getInstance(invokeInstruction.getClassName(cpg));
receiverTypeIsExact = false; // Doesn't actually matter
} else {
// For invokevirtual and invokeinterface instructions, we have
// virtual dispatch. By taking the receiver type (which may be a
// subtype of the class specified by the instruction),
// we may get a more precise set of call targets.
int instanceStackLocation = typeFrame.getInstanceStackLocation(invokeInstruction, cpg);
receiverType = typeFrame.getStackValue(instanceStackLocation);
if (!(receiverType instanceof ReferenceType)) {
return Collections.<XMethod> emptySet();
}
receiverTypeIsExact = typeFrame.isExact(instanceStackLocation);
}
if (DEBUG_METHOD_LOOKUP) {
System.out.println("[receiver type is " + receiverType + ", " + (receiverTypeIsExact ? "exact]" : " not exact]"));
}
return resolveMethodCallTargets((ReferenceType) receiverType, invokeInstruction, cpg, receiverTypeIsExact);
}