Java Opcodes.ACC_FINAL属性代码示例

public int getAccess() {
	if (asmNodes != null) {
		return asmNodes[0].access;
	} else {
		int ret = Opcodes.ACC_PUBLIC;

		if (!implementers.isEmpty()) {
			ret |= Opcodes.ACC_INTERFACE | Opcodes.ACC_ABSTRACT;
		} else if (superClass != null && superClass.id.equals("Ljava/lang/Enum;")) {
			ret |= Opcodes.ACC_ENUM;
			if (childClasses.isEmpty()) ret |= Opcodes.ACC_FINAL;
		} else if (interfaces.size() == 1 && interfaces.iterator().next().id.equals("Ljava/lang/annotation/Annotation;")) {
			ret |= Opcodes.ACC_ANNOTATION | Opcodes.ACC_INTERFACE | Opcodes.ACC_ABSTRACT;
		}

		return ret;
	}
}
 

/**
 * Checks that the given access flags do not contain invalid flags. This
 * method also checks that mutually incompatible flags are not set
 * simultaneously.
 * 
 * @param access
 *            the access flags to be checked
 * @param possibleAccess
 *            the valid access flags.
 */
static void checkAccess(final int access, final int possibleAccess) {
    if ((access & ~possibleAccess) != 0) {
        throw new IllegalArgumentException("Invalid access flags: "
                + access);
    }
    int pub = (access & Opcodes.ACC_PUBLIC) == 0 ? 0 : 1;
    int pri = (access & Opcodes.ACC_PRIVATE) == 0 ? 0 : 1;
    int pro = (access & Opcodes.ACC_PROTECTED) == 0 ? 0 : 1;
    if (pub + pri + pro > 1) {
        throw new IllegalArgumentException(
                "public private and protected are mutually exclusive: "
                        + access);
    }
    int fin = (access & Opcodes.ACC_FINAL) == 0 ? 0 : 1;
    int abs = (access & Opcodes.ACC_ABSTRACT) == 0 ? 0 : 1;
    if (fin + abs > 1) {
        throw new IllegalArgumentException(
                "final and abstract are mutually exclusive: " + access);
    }
}
 

/**
 * Modifies a {@link ClassNode} to clear final flags and rewrite byte code.
 */
@SuppressWarnings("unchecked")
private void modifyClass(ClassNode classNode) {
    // Make the class not final.
    classNode.access &= ~Opcodes.ACC_FINAL;
    
    List<MethodNode> methodNodes = classNode.methods;
    for (MethodNode methodNode : methodNodes) {
        methodNode.access &= ~Opcodes.ACC_FINAL;
        fixMethodBody(methodNode, classNode);
    }
    
    List<FieldNode> fieldNodes = classNode.fields;
    for (FieldNode fieldNode : fieldNodes) {
        // Make public instance fields non-final. This is needed e.g. to "mock" SyncResult.stats.
        if ((fieldNode.access & Opcodes.ACC_PUBLIC) != 0 &&
                (fieldNode.access & Opcodes.ACC_STATIC) == 0) {
            fieldNode.access &= ~Opcodes.ACC_FINAL;
        }
    }
    
    List<InnerClassNode> innerClasses = classNode.innerClasses;
    for (InnerClassNode innerClassNode : innerClasses) {
        innerClassNode.access &= ~Opcodes.ACC_FINAL;
    }
}
 

@Override
public double getScore(FieldInstance fieldA, FieldInstance fieldB, ClassEnvironment env) {
	if (!checkAsmNodes(fieldA, fieldB)) return compareAsmNodes(fieldA, fieldB);

	int mask = (Opcodes.ACC_PUBLIC | Opcodes.ACC_PROTECTED | Opcodes.ACC_PRIVATE) | Opcodes.ACC_FINAL | Opcodes.ACC_VOLATILE | Opcodes.ACC_TRANSIENT | Opcodes.ACC_SYNTHETIC;
	int resultA = fieldA.getAsmNode().access & mask;
	int resultB = fieldB.getAsmNode().access & mask;

	return 1 - Integer.bitCount(resultA ^ resultB) / 6.;
}
 

@Override
public double getScore(MethodInstance methodA, MethodInstance methodB, ClassEnvironment env) {
	if (!checkAsmNodes(methodA, methodB)) return compareAsmNodes(methodA, methodB);

	int mask = (Opcodes.ACC_PUBLIC | Opcodes.ACC_PROTECTED | Opcodes.ACC_PRIVATE) | Opcodes.ACC_FINAL | Opcodes.ACC_SYNCHRONIZED | Opcodes.ACC_BRIDGE | Opcodes.ACC_VARARGS | Opcodes.ACC_STRICT | Opcodes.ACC_SYNTHETIC;
	int resultA = methodA.getAsmNode().access & mask;
	int resultB = methodB.getAsmNode().access & mask;

	return 1 - Integer.bitCount(resultA ^ resultB) / 8.;
}
 

@Override
public MethodVisitor visitMethod(final int access, final String name,
        final String desc, final String signature, final String[] exceptions) {
    if (computeSVUID) {
        if ("<clinit>".equals(name)) {
            hasStaticInitializer = true;
        }
        /*
         * Remembers non private constructors and methods for SVUID
         * computation For constructor and method modifiers, only the
         * ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC, ACC_FINAL,
         * ACC_SYNCHRONIZED, ACC_NATIVE, ACC_ABSTRACT and ACC_STRICT flags
         * are used.
         */
        int mods = access
                & (Opcodes.ACC_PUBLIC | Opcodes.ACC_PRIVATE
                        | Opcodes.ACC_PROTECTED | Opcodes.ACC_STATIC
                        | Opcodes.ACC_FINAL | Opcodes.ACC_SYNCHRONIZED
                        | Opcodes.ACC_NATIVE | Opcodes.ACC_ABSTRACT | Opcodes.ACC_STRICT);

        // all non private methods
        if ((access & Opcodes.ACC_PRIVATE) == 0) {
            if ("<init>".equals(name)) {
                svuidConstructors.add(new Item(name, mods, desc));
            } else if (!"<clinit>".equals(name)) {
                svuidMethods.add(new Item(name, mods, desc));
            }
        }
    }

    return super.visitMethod(access, name, desc, signature, exceptions);
}
 

protected void addSVUID(long svuid) {
    FieldVisitor fv = super.visitField(Opcodes.ACC_FINAL
            + Opcodes.ACC_STATIC, "serialVersionUID", "J", null, svuid);
    if (fv != null) {
        fv.visitEnd();
    }
}
 

@Override
public FieldVisitor visitField(final int access, final String name,
        final String desc, final String signature, final Object value) {
    if (computeSVUID) {
        if ("serialVersionUID".equals(name)) {
            // since the class already has SVUID, we won't be computing it.
            computeSVUID = false;
            hasSVUID = true;
        }
        /*
         * Remember field for SVUID computation For field modifiers, only
         * the ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, ACC_STATIC,
         * ACC_FINAL, ACC_VOLATILE, and ACC_TRANSIENT flags are used when
         * computing serialVersionUID values.
         */
        if ((access & Opcodes.ACC_PRIVATE) == 0
                || (access & (Opcodes.ACC_STATIC | Opcodes.ACC_TRANSIENT)) == 0) {
            int mods = access
                    & (Opcodes.ACC_PUBLIC | Opcodes.ACC_PRIVATE
                            | Opcodes.ACC_PROTECTED | Opcodes.ACC_STATIC
                            | Opcodes.ACC_FINAL | Opcodes.ACC_VOLATILE | Opcodes.ACC_TRANSIENT);
            svuidFields.add(new Item(name, mods, desc));
        }
    }

    return super.visitField(access, name, desc, signature, value);
}
 

public FieldVisitor visitField(int access, String name, String desc,
		String signature, Object value) {
	if ((access & Opcodes.ACC_FINAL) != 0) {
		finalFields.add(name);
	}
	return super.visitField(access, name, desc, signature, value);
}
 

private static boolean isConstant(int access) {
    return (access & Opcodes.ACC_FINAL) != 0 && (access & Opcodes.ACC_STATIC) != 0;
}
 

static void appendAccess(final int access, final StringBuilder sb) {
    if ((access & Opcodes.ACC_PUBLIC) != 0) {
        sb.append("public ");
    }
    if ((access & Opcodes.ACC_PRIVATE) != 0) {
        sb.append("private ");
    }
    if ((access & Opcodes.ACC_PROTECTED) != 0) {
        sb.append("protected ");
    }
    if ((access & Opcodes.ACC_FINAL) != 0) {
        sb.append("final ");
    }
    if ((access & Opcodes.ACC_STATIC) != 0) {
        sb.append("static ");
    }
    if ((access & Opcodes.ACC_SUPER) != 0) {
        if ((access & ACCESS_CLASS) == 0) {
            sb.append("synchronized ");
        } else {
            sb.append("super ");
        }
    }
    if ((access & Opcodes.ACC_VOLATILE) != 0) {
        if ((access & ACCESS_FIELD) == 0) {
            sb.append("bridge ");
        } else {
            sb.append("volatile ");
        }
    }
    if ((access & Opcodes.ACC_TRANSIENT) != 0) {
        if ((access & ACCESS_FIELD) == 0) {
            sb.append("varargs ");
        } else {
            sb.append("transient ");
        }
    }
    if ((access & Opcodes.ACC_NATIVE) != 0) {
        sb.append("native ");
    }
    if ((access & Opcodes.ACC_STRICT) != 0) {
        sb.append("strict ");
    }
    if ((access & Opcodes.ACC_INTERFACE) != 0) {
        sb.append("interface ");
    }
    if ((access & Opcodes.ACC_ABSTRACT) != 0) {
        sb.append("abstract ");
    }
    if ((access & Opcodes.ACC_SYNTHETIC) != 0) {
        sb.append("synthetic ");
    }
    if ((access & Opcodes.ACC_ANNOTATION) != 0) {
        sb.append("annotation ");
    }
    if ((access & Opcodes.ACC_ENUM) != 0) {
        sb.append("enum ");
    }
    if ((access & Opcodes.ACC_DEPRECATED) != 0) {
        sb.append("deprecated ");
    }
    if ((access & Opcodes.ACC_MANDATED) != 0) {
        sb.append("mandated ");
    }
}
 

public boolean isFinal() {
	return (getAccess() & Opcodes.ACC_FINAL) != 0;
}
 

/**
 * Appends a string representation of the given access modifiers to
 * {@link #buf buf}.
 *
 * @param access
 *            some access modifiers.
 */
private void appendAccess(final int access) {
    if ((access & Opcodes.ACC_PUBLIC) != 0) {
        buf.append("public ");
    }
    if ((access & Opcodes.ACC_PRIVATE) != 0) {
        buf.append("private ");
    }
    if ((access & Opcodes.ACC_PROTECTED) != 0) {
        buf.append("protected ");
    }
    if ((access & Opcodes.ACC_FINAL) != 0) {
        buf.append("final ");
    }
    if ((access & Opcodes.ACC_STATIC) != 0) {
        buf.append("static ");
    }
    if ((access & Opcodes.ACC_SYNCHRONIZED) != 0) {
        buf.append("synchronized ");
    }
    if ((access & Opcodes.ACC_VOLATILE) != 0) {
        buf.append("volatile ");
    }
    if ((access & Opcodes.ACC_TRANSIENT) != 0) {
        buf.append("transient ");
    }
    if ((access & Opcodes.ACC_ABSTRACT) != 0) {
        buf.append("abstract ");
    }
    if ((access & Opcodes.ACC_STRICT) != 0) {
        buf.append("strictfp ");
    }
    if ((access & Opcodes.ACC_SYNTHETIC) != 0) {
        buf.append("synthetic ");
    }
    if ((access & Opcodes.ACC_MANDATED) != 0) {
        buf.append("mandated ");
    }
    if ((access & Opcodes.ACC_ENUM) != 0) {
        buf.append("enum ");
    }
}
 

public static ClassAccessMatcher isFinal() {
    return new ClassAccessMatcher(Opcodes.ACC_FINAL);
}
 

public static MethodAccessMatch isFinal() {
    return new MethodAccessMatch(Opcodes.ACC_FINAL);
}