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  5. java.lang.invoke.MethodType#toMethodDescriptorString ( )

java.lang.invoke.MethodType#toMethodDescriptorString ( )源码实例Demo

下面列出了java.lang.invoke.MethodType#toMethodDescriptorString ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： dragonwell8_jdk   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码2 项目： TencentKona-8   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码3 项目： jdk8u60   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码4 项目： openjdk-jdk8u   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码5 项目： openjdk-jdk8u-backup   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码6 项目： openjdk-jdk9   文件： Method.java 
private Handle generateBootstrapMethod(Handle h) {
    String bootstrapName = "bootstrapMethod";
    MethodType bootstrapType = MethodType.methodType(CallSite.class, MethodHandles.Lookup.class, String.class, MethodType.class);

    MethodVisitor bmv = cv.visitMethod(ACC_PUBLIC | ACC_STATIC, bootstrapName, bootstrapType.toMethodDescriptorString(), null, null);
    bmv.visitCode();

    String constCallSite = "java/lang/invoke/ConstantCallSite";
    bmv.visitTypeInsn(NEW, constCallSite);
    bmv.visitInsn(DUP);

    bmv.visitLdcInsn(h);

    bmv.visitMethodInsn(INVOKESPECIAL, constCallSite, "<init>", "(Ljava/lang/invoke/MethodHandle;)V", false);
    bmv.visitInsn(ARETURN);

    bmv.visitMaxs(0,0);
    bmv.visitEnd();

    return new Handle(H_INVOKESTATIC, ownerClassName, bootstrapName, bootstrapType.toMethodDescriptorString());
}
源代码7 项目： openjdk-jdk9   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码8 项目： jdk8u-jdk   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码9 项目： hottub   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码10 项目： openjdk-8-source   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码11 项目： openjdk-8   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码12 项目： jdk8u_jdk   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码13 项目： jdk8u-jdk   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码14 项目： jdk8u-dev-jdk   文件： MethodTypeTest.java 
/**
 * Test of make method, of class MethodType.
 */
@Test
public void testMake_String_ClassLoader() {
    System.out.println("make (from bytecode signature)");
    ClassLoader loader = null;
    MethodType[] instances = {mt_viS, mt_OO2, mt_vv, mt_Ov, mt_iSI, mt_ISi, mt_ISI, mt_iSi};
    String obj = "Ljava/lang/Object;";
    assertEquals(obj, concat(Object.class));
    String[] expResults = {
        "(ILjava/lang/String;)V",
        concat("(", obj, 2, ")", Object.class),
        "()V", "()"+obj,
        concat("(", String.class, Integer.class, ")I"),
        concat("(", String.class, "I)", Integer.class),
        concat("(", String.class, Integer.class, ")", Integer.class),
        concat("(", String.class, "I)I")
    };
    for (int i = 0; i < instances.length; i++) {
        MethodType instance = instances[i];
        String result = instance.toMethodDescriptorString();
        assertEquals("#"+i, expResults[i], result);
        MethodType parsed = MethodType.fromMethodDescriptorString(result, loader);
        assertSame("--#"+i, instance, parsed);
    }
}
源代码15 项目： zelixkiller   文件： ReflectionObfuscationVMT11.java 
/**
 * Converts BoundMethodHandle$Species_L to AbstractInsnNode reference
 * 
 * @param cn
 */
private AbstractInsnNode getOriginalNode(MethodHandle mh, Lookup lookup) throws Exception {
	Field original = mh.getClass().getDeclaredField("argL0");
	original.setAccessible(true);
	MethodHandle originalHandle = (MethodHandle) original.get(mh);

	MethodHandleInfo direct = lookup.revealDirect(originalHandle);

	int refKind = direct.getReferenceKind();
	Class<?> declaringClass = direct.getDeclaringClass();
	String name = direct.getName();
	MethodType methodType = direct.getMethodType();
	int op = -1;
	if (refKind <= 4) {
		switch (refKind) {
		case 1:
			op = GETFIELD;
			break;
		case 2:
			op = GETSTATIC;
			break;
		case 3:
			op = PUTFIELD;
			break;
		case 4:
			op = PUTSTATIC;
			break;
		}
		String desc;
		if (refKind <= 2) {
			desc = methodType.toMethodDescriptorString().substring(2);
		} else {
			// method handle treats field setting as a method (returning void)
			String mds = methodType.toMethodDescriptorString();
			desc = mds.substring(1, mds.lastIndexOf(')'));
		}
		return new FieldInsnNode(op, declaringClass.getName().replace('.', '/'), name, desc);
	}
	switch (refKind) {
	case 5:
		op = INVOKEVIRTUAL;
		break;
	case 6:
		op = INVOKESTATIC;
		break;
	case 7:
	case 8:
		op = INVOKESPECIAL;
		break;
	case 9:
		op = INVOKEINTERFACE;
		break;
	}
	return new MethodInsnNode(op, declaringClass.getName().replace('.', '/'), name,
			methodType.toMethodDescriptorString());
}
源代码16 项目： Bytecoder   文件： ProxyGenerator.java 
/**
 * Generate this method, including the code and exception table entry.
 */
private void generateMethod(ClassWriter cw, String className) {
    MethodType mt = MethodType.methodType(returnType, parameterTypes);
    String desc = mt.toMethodDescriptorString();
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_FINAL,
            method.getName(), desc, null,
            typeNames(Arrays.asList(exceptionTypes)));

    int[] parameterSlot = new int[parameterTypes.length];
    int nextSlot = 1;
    for (int i = 0; i < parameterSlot.length; i++) {
        parameterSlot[i] = nextSlot;
        nextSlot += getWordsPerType(parameterTypes[i]);
    }

    mv.visitCode();
    Label L_startBlock = new Label();
    Label L_endBlock = new Label();
    Label L_RuntimeHandler = new Label();
    Label L_ThrowableHandler = new Label();

    List<Class<?>> catchList = computeUniqueCatchList(exceptionTypes);
    if (catchList.size() > 0) {
        for (Class<?> ex : catchList) {
            mv.visitTryCatchBlock(L_startBlock, L_endBlock, L_RuntimeHandler,
                    dotToSlash(ex.getName()));
        }

        mv.visitTryCatchBlock(L_startBlock, L_endBlock, L_ThrowableHandler,
                JL_THROWABLE);
    }
    mv.visitLabel(L_startBlock);

    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, JLR_PROXY, handlerFieldName,
            LJLR_INVOCATION_HANDLER);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETSTATIC, dotToSlash(className), methodFieldName,
            LJLR_METHOD);

    if (parameterTypes.length > 0) {
        // Create an array and fill with the parameters converting primitives to wrappers
        emitIconstInsn(mv, parameterTypes.length);
        mv.visitTypeInsn(Opcodes.ANEWARRAY, JL_OBJECT);
        for (int i = 0; i < parameterTypes.length; i++) {
            mv.visitInsn(DUP);
            emitIconstInsn(mv, i);
            codeWrapArgument(mv, parameterTypes[i], parameterSlot[i]);
            mv.visitInsn(Opcodes.AASTORE);
        }
    } else {
        mv.visitInsn(Opcodes.ACONST_NULL);
    }

    mv.visitMethodInsn(INVOKEINTERFACE, JLR_INVOCATION_HANDLER,
            "invoke",
            "(Ljava/lang/Object;Ljava/lang/reflect/Method;" +
                    "[Ljava/lang/Object;)Ljava/lang/Object;", true);

    if (returnType == void.class) {
        mv.visitInsn(POP);
        mv.visitInsn(RETURN);
    } else {
        codeUnwrapReturnValue(mv, returnType);
    }

    mv.visitLabel(L_endBlock);

    // Generate exception handler
    mv.visitLabel(L_RuntimeHandler);
    mv.visitInsn(ATHROW);   // just rethrow the exception

    mv.visitLabel(L_ThrowableHandler);
    mv.visitVarInsn(ASTORE, 1);
    mv.visitTypeInsn(Opcodes.NEW, JLR_UNDECLARED_THROWABLE_EX);
    mv.visitInsn(DUP);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKESPECIAL, JLR_UNDECLARED_THROWABLE_EX,
            "<init>", "(Ljava/lang/Throwable;)V", false);
    mv.visitInsn(ATHROW);
    // Maxs computed by ClassWriter.COMPUTE_FRAMES, these arguments ignored
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}
源代码17 项目： openjdk-jdk9   文件： InvokeDynamicPatcher.java 
@Override
public MethodVisitor visitMethod(final int access, final String name,
        final String desc, final String signature,
        final String[] exceptions) {
    /* a code generate looks like
     *  0: aload_0
     *  1: ldc           #125  // int 1
     *  3: ldc2_w        #126  // long 2l
     *  6: ldc           #128  // float 3.0f
     *  8: ldc2_w        #129  // double 4.0d
     * 11: ldc           #132  // String 5
     * 13: aload_0
     * 14: getfield      #135  // Field nativeCallee:Z
     * 17: ifeq          28
     * 20: invokedynamic #181,  0            // InvokeDynamic #1:calleeNative:(Lcompiler/calls/common/InvokeDynamic;IJFDLjava/lang/String;)Z
     * 25: goto          33
     * 28: invokedynamic #183,  0            // InvokeDynamic #1:callee:(Lcompiler/calls/common/InvokeDynamic;IJFDLjava/lang/String;)Z
     * 33: ldc           #185                // String Call insuccessfull
     * 35: invokestatic  #191                // Method jdk/test/lib/Asserts.assertTrue:(ZLjava/lang/String;)V
     * 38: return
     *
     * or, using java-like pseudo-code
     * if (this.nativeCallee == false) {
     *     invokedynamic-call-return-value = invokedynamic-of-callee
     * } else {
     *     invokedynamic-call-return-value = invokedynamic-of-nativeCallee
     * }
     * Asserts.assertTrue(invokedynamic-call-return-value, error-message);
     * return;
     */
    if (name.equals(CALLER_METHOD_NAME)) {
        MethodVisitor mv = cv.visitMethod(access, name, desc,
                signature, exceptions);
        Label nonNativeLabel = new Label();
        Label checkLabel = new Label();
        MethodType mtype = MethodType.methodType(CallSite.class,
                MethodHandles.Lookup.class, String.class, MethodType.class);
        Handle bootstrap = new Handle(Opcodes.H_INVOKESTATIC, CLASS,
                BOOTSTRAP_METHOD_NAME, mtype.toMethodDescriptorString());
        mv.visitCode();
        // push callee parameters onto stack
        mv.visitVarInsn(Opcodes.ALOAD, 0);//push "this"
        mv.visitLdcInsn(1);
        mv.visitLdcInsn(2L);
        mv.visitLdcInsn(3.0f);
        mv.visitLdcInsn(4.0d);
        mv.visitLdcInsn("5");
        // params loaded. let's decide what method to call
        mv.visitVarInsn(Opcodes.ALOAD, 0); // push "this"
        // get nativeCallee field
        mv.visitFieldInsn(Opcodes.GETFIELD, CLASS, CALL_NATIVE_FIELD,
                CALL_NATIVE_FIELD_DESC);
        // if nativeCallee == false goto nonNativeLabel
        mv.visitJumpInsn(Opcodes.IFEQ, nonNativeLabel);
        // invokedynamic nativeCalleeMethod using bootstrap method
        mv.visitInvokeDynamicInsn(NATIVE_CALLEE_METHOD_NAME,
                CALLEE_METHOD_DESC, bootstrap);
        // goto checkLabel
        mv.visitJumpInsn(Opcodes.GOTO, checkLabel);
        // label: nonNativeLabel
        mv.visitLabel(nonNativeLabel);
        // invokedynamic calleeMethod using bootstrap method
        mv.visitInvokeDynamicInsn(CALLEE_METHOD_NAME, CALLEE_METHOD_DESC,
                bootstrap);
        mv.visitLabel(checkLabel);
        mv.visitLdcInsn(CallsBase.CALL_ERR_MSG);
        mv.visitMethodInsn(Opcodes.INVOKESTATIC, ASSERTS_CLASS,
                ASSERTTRUE_METHOD_NAME, ASSERTTRUE_METHOD_DESC, false);
        // label: return
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
        return null;
    }
    return super.visitMethod(access, name, desc, signature, exceptions);
}
 方法所在类
java.lang.invoke.MethodType
 同类方法
methodType ( )
parameterCount ( )
parameterType ( )
genericMethodType ( )
returnType ( )
parameterArray ( )
insertParameterTypes ( )
changeParameterType ( )
changeReturnType ( )
toMethodDescriptorString ( )
fromMethodDescriptorString ( )
equals ( )
toString ( )
hashCode ( )
dropParameterTypes ( )
parameterList ( )
generic ( )
appendParameterTypes ( )
getClass ( )