Java Method.getSignature方法代码示例

import org.apache.bcel.classfile.Method; //导入方法依赖的package包/类
protected String[] analyze(Method method) {
 SignatureParser parser = new SignatureParser(method.getSignature());
 ArrayList<String> resultList = new ArrayList<String>();
 for (Iterator<String> i = parser.parameterSignatureIterator(); i.hasNext();) {
  resultList.add(i.next());
 }
 return resultList.toArray(new String[resultList.size()]);
}
 

import org.apache.bcel.classfile.Method; //导入方法依赖的package包/类
/**
 * Is the given instruction a self-call?
 */
private Method isSelfCall(InvokeInstruction inv) {
	ConstantPoolGen cpg = classContext.getConstantPoolGen();
	JavaClass jclass = classContext.getJavaClass();

	String calledClassName = inv.getClassName(cpg);

	// FIXME: is it possible we would see a superclass name here?
	// Not a big deal for now, as we are mostly just interested in calls
	// to private methods, for which we will definitely see the right
	// called class name.
	if (!calledClassName.equals(jclass.getClassName()))
		return null;

	String calledMethodName = inv.getMethodName(cpg);
	String calledMethodSignature = inv.getSignature(cpg);
	boolean isStaticCall = (inv instanceof INVOKESTATIC);

	// Scan methods for one that matches.
	Method[] methods = jclass.getMethods();
	for (int i = 0; i < methods.length; ++i) {
		Method method = methods[i];

		String methodName = method.getName();
		String signature = method.getSignature();
		boolean isStatic = method.isStatic();

		if (methodName.equals(calledMethodName) &&
		        signature.equals(calledMethodSignature) &&
		        isStatic == isStaticCall) {
			// This method looks like a match.
			return wantCallsFor(method) ? method : null;
		}
	}

	// Hmm...no matching method found.
	// This is almost certainly because the named method
	// was inherited from a superclass.
	if (DEBUG) System.out.println("No method found for " + calledClassName + "." + calledMethodName + " : " + calledMethodSignature);
	return null;
}
 

import org.apache.bcel.classfile.Method; //导入方法依赖的package包/类
public void visit(Method obj) {
	int accessFlags = obj.getAccessFlags();
	if ((accessFlags & ACC_STATIC) != 0) return;
	String name = obj.getName();
	String sig = obj.getSignature();
	if ((accessFlags & ACC_ABSTRACT) != 0) {
		if (name.equals("equals")
		        && sig.equals("(L" + getClassName() + ";)Z")) {
			bugReporter.reportBug(new BugInstance(this, "EQ_ABSTRACT_SELF", LOW_PRIORITY).addClass(getDottedClassName()));
			return;
		} else if (name.equals("compareTo")
		        && sig.equals("(L" + getClassName() + ";)I")) {
			bugReporter.reportBug(new BugInstance(this, "CO_ABSTRACT_SELF", LOW_PRIORITY).addClass(getDottedClassName()));
			return;
		}
	}
	boolean sigIsObject = sig.equals("(Ljava/lang/Object;)Z");
	if (name.equals("hashCode")
	        && sig.equals("()I")) {
		hasHashCode = true;
		if (obj.isAbstract()) hashCodeIsAbstract = true;
		// System.out.println("Found hashCode for " + betterClassName);
	} else if (name.equals("equals")) {
		if (sigIsObject) {
			hasEqualsObject = true;
			if (obj.isAbstract())
				equalsObjectIsAbstract = true;
			else {
				Code code = obj.getCode();
				byte[] codeBytes = code.getCode();

				if ((codeBytes.length == 5 &&
				        (codeBytes[1] & 0xff) == INSTANCEOF)
				        || (codeBytes.length == 15 &&
				        (codeBytes[1] & 0xff) == INSTANCEOF &&
				        (codeBytes[11] & 0xff) == INVOKESPECIAL)) {
					equalsMethodIsInstanceOfEquals = true;
				}
			}
		} else if (sig.equals("(L" + getClassName() + ";)Z"))
			hasEqualsSelf = true;
	} else if (name.equals("compareTo")) {
		if (sig.equals("(Ljava/lang/Object;)I"))
			hasCompareToObject = true;
		else if (sig.equals("(L" + getClassName() + ";)I"))
			hasCompareToSelf = true;
	}
}