Examples with FieldVisitor org.objectweb.asm.FieldVisitor used on opensource projects

Example 66 with FieldVisitor

use of org.objectweb.asm.FieldVisitor in project LanternServer by LanternPowered.

the class SubtypeFilterDelegate method createFields.

public void createFields(ClassWriter cw) {
    FieldVisitor fv = cw.visitField(0, "classes", "Ljava/util/Set;", "Ljava/util/Set<Ljava/lang/Class<*>;>;", null);
    fv.visitEnd();
}

Example 67 with FieldVisitor

use of org.objectweb.asm.FieldVisitor in project spring-loaded by spring-projects.

the class SystemClassReflectionGenerator method generateJLRM_Invoke.

public static void generateJLRM_Invoke(ClassWriter cw, String classname) {
    FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_STATIC, jlrmInvokeMember, "Ljava/lang/reflect/Method;", null, null);
    fv.visitEnd();
    MethodVisitor mv = cw.visitMethod(ACC_PRIVATE + ACC_STATIC, jlrmInvokeMember, jlrmInvokeDescriptor, null, new String[] { "java/lang/IllegalAccessException", "java/lang/reflect/InvocationTargetException" });
    mv.visitCode();
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Exception");
    Label l3 = new Label();
    mv.visitLabel(l3);
    mv.visitFieldInsn(GETSTATIC, classname, jlrmInvokeMember, "Ljava/lang/reflect/Method;");
    mv.visitJumpInsn(IFNONNULL, l0);
    Label l4 = new Label();
    mv.visitLabel(l4);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 2);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/reflect/Method", "invoke", "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;", false);
    mv.visitInsn(ARETURN);
    mv.visitLabel(l0);
    mv.visitFieldInsn(GETSTATIC, classname, jlrmInvokeMember, "Ljava/lang/reflect/Method;");
    mv.visitInsn(ACONST_NULL);
    mv.visitInsn(ICONST_3);
    mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
    mv.visitInsn(DUP);
    mv.visitInsn(ICONST_0);
    // target method
    mv.visitVarInsn(ALOAD, 0);
    mv.visitInsn(AASTORE);
    mv.visitInsn(DUP);
    mv.visitInsn(ICONST_1);
    // instance on which to call the method
    mv.visitVarInsn(ALOAD, 1);
    mv.visitInsn(AASTORE);
    mv.visitInsn(DUP);
    mv.visitInsn(ICONST_2);
    // arguments to method call
    mv.visitVarInsn(ALOAD, 2);
    mv.visitInsn(AASTORE);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/reflect/Method", "invoke", "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;", false);
    mv.visitLabel(l1);
    mv.visitInsn(ARETURN);
    mv.visitLabel(l2);
    mv.visitVarInsn(ASTORE, 3);
    Label l5 = new Label();
    mv.visitLabel(l5);
    Label l6 = new Label();
    mv.visitLabel(l6);
    mv.visitInsn(ACONST_NULL);
    mv.visitInsn(ARETURN);
    Label l7 = new Label();
    mv.visitLabel(l7);
    mv.visitMaxs(8, 4);
    mv.visitEnd();
}

Example 68 with FieldVisitor

use of org.objectweb.asm.FieldVisitor in project spring-loaded by spring-projects.

the class SystemClassReflectionGenerator method generateJLCGDFS.

public static void generateJLCGDFS(ClassWriter cw, String classname) {
    FieldVisitor fv = cw.visitField(ACC_PUBLIC_STATIC, "__sljlcgdfs", "Ljava/lang/reflect/Method;", null, null);
    fv.visitEnd();
    MethodVisitor mv = cw.visitMethod(ACC_PRIVATE + ACC_STATIC, "__sljlcgdfs", "(Ljava/lang/Class;)[Ljava/lang/reflect/Field;", null, null);
    mv.visitCode();
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Exception");
    Label l3 = new Label();
    mv.visitLabel(l3);
    mv.visitFieldInsn(GETSTATIC, classname, "__sljlcgdfs", "Ljava/lang/reflect/Method;");
    mv.visitJumpInsn(IFNONNULL, l0);
    Label l4 = new Label();
    mv.visitLabel(l4);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getDeclaredFields", "()[Ljava/lang/reflect/Field;", false);
    mv.visitInsn(ARETURN);
    mv.visitLabel(l0);
    mv.visitFieldInsn(GETSTATIC, classname, "__sljlcgdfs", "Ljava/lang/reflect/Method;");
    mv.visitInsn(ACONST_NULL);
    mv.visitInsn(ICONST_1);
    mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
    mv.visitInsn(DUP);
    mv.visitInsn(ICONST_0);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitInsn(AASTORE);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/reflect/Method", "invoke", "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;", false);
    mv.visitTypeInsn(CHECKCAST, "[Ljava/lang/reflect/Field;");
    mv.visitLabel(l1);
    mv.visitInsn(ARETURN);
    mv.visitLabel(l2);
    mv.visitVarInsn(ASTORE, 1);
    Label l5 = new Label();
    mv.visitLabel(l5);
    mv.visitInsn(ACONST_NULL);
    mv.visitInsn(ARETURN);
    Label l6 = new Label();
    mv.visitLabel(l6);
    // mv.visitLocalVariable("clazz", "Ljava/lang/Class;", "Ljava/lang/Class<*>;", l3, l6, 0);
    // mv.visitLocalVariable("e", "Ljava/lang/Exception;", null, l5, l6, 1);
    mv.visitMaxs(6, 2);
    mv.visitEnd();
}

Example 69 with FieldVisitor

use of org.objectweb.asm.FieldVisitor in project spring-loaded by spring-projects.

the class SystemClassReflectionGenerator method generateJLC_GetDeclaredConstructors.

public static void generateJLC_GetDeclaredConstructors(ClassWriter cw, String classname) {
    FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_STATIC, jlcGetDeclaredConstructorsMember, "Ljava/lang/reflect/Method;", null, null);
    fv.visitEnd();
    MethodVisitor mv = cw.visitMethod(ACC_PRIVATE + ACC_STATIC, jlcGetDeclaredConstructorsMember, jlcGetDeclaredConstructorsDescriptor, null, null);
    mv.visitCode();
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Exception");
    Label l3 = new Label();
    mv.visitLabel(l3);
    mv.visitFieldInsn(GETSTATIC, classname, jlcGetDeclaredConstructorsMember, "Ljava/lang/reflect/Method;");
    mv.visitJumpInsn(IFNONNULL, l0);
    Label l4 = new Label();
    mv.visitLabel(l4);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getDeclaredConstructors", "()[Ljava/lang/reflect/Constructor;", false);
    mv.visitInsn(ARETURN);
    mv.visitLabel(l0);
    mv.visitFieldInsn(GETSTATIC, classname, jlcGetDeclaredConstructorsMember, "Ljava/lang/reflect/Method;");
    mv.visitInsn(ACONST_NULL);
    mv.visitInsn(ICONST_1);
    mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
    mv.visitInsn(DUP);
    mv.visitInsn(ICONST_0);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitInsn(AASTORE);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/reflect/Method", "invoke", "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;", false);
    mv.visitTypeInsn(CHECKCAST, "[Ljava/lang/reflect/Constructor;");
    mv.visitLabel(l1);
    mv.visitInsn(ARETURN);
    mv.visitLabel(l2);
    mv.visitVarInsn(ASTORE, 1);
    Label l5 = new Label();
    mv.visitLabel(l5);
    Label l6 = new Label();
    mv.visitLabel(l6);
    mv.visitInsn(ACONST_NULL);
    mv.visitInsn(ARETURN);
    Label l7 = new Label();
    mv.visitLabel(l7);
    // mv.visitLocalVariable("clazz", "Ljava/lang/Class;", "Ljava/lang/Class<*>;", l3, l7, 0);
    // mv.visitLocalVariable("e", "Ljava/lang/Exception;", null, l5, l7, 1);
    mv.visitMaxs(6, 2);
    mv.visitEnd();
}

Example 70 with FieldVisitor

use of org.objectweb.asm.FieldVisitor in project spring-loaded by spring-projects.

the class SystemClassReflectionGenerator method generateJLObjectStream_hasStaticInitializer.

/**
 * Create a method that can be used to intercept the calls to hasStaticInitializer made in the ObjectStreamClass.
 * The method will ask SpringLoaded whether the type has a static initializer. SpringLoaded will be able to answer
 * if it is a reloadable type. If it is not a reloadable type then springloaded will throw an exception which will
 * be caught here and the 'regular' call to hasStaticInitializer will be made.
 *
 * @param cw the classwriter to create the method in
 * @param classname the name of the class being visited
 */
public static void generateJLObjectStream_hasStaticInitializer(ClassWriter cw, String classname) {
    FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_STATIC, jloObjectStream_hasInitializerMethod, "Ljava/lang/reflect/Method;", null, null);
    fv.visitEnd();
    MethodVisitor mv = cw.visitMethod(ACC_PRIVATE + ACC_STATIC, jloObjectStream_hasInitializerMethod, "(Ljava/lang/Class;)Z", null, null);
    mv.visitCode();
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Exception");
    mv.visitLabel(l0);
    mv.visitFieldInsn(GETSTATIC, classname, jloObjectStream_hasInitializerMethod, "Ljava/lang/reflect/Method;");
    mv.visitInsn(ACONST_NULL);
    mv.visitInsn(ICONST_1);
    mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
    mv.visitInsn(DUP);
    mv.visitInsn(ICONST_0);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitInsn(AASTORE);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/reflect/Method", "invoke", "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;", false);
    mv.visitTypeInsn(CHECKCAST, "java/lang/Boolean");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Boolean", "booleanValue", "()Z", false);
    mv.visitLabel(l1);
    mv.visitInsn(IRETURN);
    mv.visitLabel(l2);
    // If not a reloadable type, we'll end up here (the method we called threw IllegalStateException), just make that native method call
    mv.visitVarInsn(ASTORE, 1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESTATIC, classname, "hasStaticInitializer", "(Ljava/lang/Class;)Z");
    mv.visitInsn(IRETURN);
    mv.visitMaxs(3, 1);
    mv.visitEnd();
}