Example usage for org.objectweb.asm MethodVisitor visitLdcInsn

List of usage examples for org.objectweb.asm MethodVisitor visitLdcInsn

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Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitLdcInsn.

Prototype

public void visitLdcInsn(final Object value)

Source Link

Document

Visits a LDC instruction.

Usage

From source file:net.wpm.reflectasm.ClassAccess.java

License:Open Source License

static private MethodVisitor insertThrowExceptionForFieldNotFound(MethodVisitor mv) {
    mv.visitTypeInsn(NEW, "java/lang/IllegalArgumentException");
    mv.visitInsn(DUP);/*from w ww  .  ja  va 2s . com*/
    mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
    mv.visitInsn(DUP);
    mv.visitLdcInsn("Field not found: ");
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V", false);
    mv.visitVarInsn(ILOAD, 2);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;",
            false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/IllegalArgumentException", "<init>", "(Ljava/lang/String;)V",
            false);
    mv.visitInsn(ATHROW);
    return mv;
}

From source file:net.wpm.reflectasm.ClassAccess.java

License:Open Source License

static private MethodVisitor insertThrowExceptionForFieldType(MethodVisitor mv, String fieldType) {
    mv.visitTypeInsn(NEW, "java/lang/IllegalArgumentException");
    mv.visitInsn(DUP);//  www.  j a  va2s. com
    mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
    mv.visitInsn(DUP);
    mv.visitLdcInsn("Field not declared as " + fieldType + ": ");
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V", false);
    mv.visitVarInsn(ILOAD, 2);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;",
            false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/IllegalArgumentException", "<init>", "(Ljava/lang/String;)V",
            false);
    mv.visitInsn(ATHROW);
    return mv;
}

From source file:net.yrom.tools.ShrinkRClassVisitor.java

License:Apache License

private static void pushInt(MethodVisitor mv, int i) {
    if (0 <= i && i <= 5) {
        mv.visitInsn(Opcodes.ICONST_0 + i); //  ICONST_0 ~ ICONST_5
    } else if (i <= Byte.MAX_VALUE) {
        mv.visitIntInsn(Opcodes.BIPUSH, i);
    } else if (i <= Short.MAX_VALUE) {
        mv.visitIntInsn(Opcodes.SIPUSH, i);
    } else {//from www  .  j  a v  a 2  s .  c o m
        mv.visitLdcInsn(i);
    }
}

From source file:nova.core.wrapper.mc.forge.v17.asm.lib.ComponentInjector.java

License:Open Source License

private Class<? extends T> construct(List<Class<? extends Component>> components) {

    // Map components to specified wrapped interfaces
    Map<Class<?>, Class<? extends Component>> intfComponentMap = new HashMap<>();
    for (Class<? extends Component> component : components) {
        for (Passthrough pt : component.getAnnotationsByType(Passthrough.class)) {
            Class<?> intf;/*from w  w w . j a va 2s.c  om*/
            try {
                intf = Class.forName(pt.value());
            } catch (ClassNotFoundException exec) {
                throw new ClassLoaderUtil.ClassLoaderException(
                        "Invalid passthrough \"%s\" on component %s, the specified interface doesn't exist.",
                        pt.value(), component);
            }
            if (!intf.isAssignableFrom(component)) {
                throw new ClassLoaderUtil.ClassLoaderException(
                        "Invalid passthrough \"%s\" on component %s, the specified interface isn't implemented.",
                        pt.value(), component);
            }
            if (intfComponentMap.containsKey(intf)) {
                throw new ClassLoaderUtil.ClassLoaderException(
                        "Duplicate Passthrough interface found: %s (%s, %s)", pt.value(), component,
                        intfComponentMap.get(intf));
            }
            intfComponentMap.put(intf, component);
        }
    }

    // Create new ClassNode from cached bytes
    ClassNode clazzNode = new ClassNode();
    String name = Type.getInternalName(baseClazz);
    String classname = name + "_$$_NOVA_" + cache.size();

    // Inject block field
    clazzNode.visit(V1_8, ACC_PUBLIC | ACC_SUPER, classname, null, name,
            intfComponentMap.keySet().stream().map(Type::getInternalName).toArray(s -> new String[s]));
    clazzNode.visitField(ACC_PRIVATE | ACC_FINAL, "$$_provider", Type.getDescriptor(ComponentProvider.class),
            null, null).visitEnd();

    // Add constructors
    for (Constructor<?> constructor : baseClazz.getConstructors()) {
        int mod = constructor.getModifiers();
        String descr = Type.getConstructorDescriptor(constructor);

        if (Modifier.isFinal(mod) || Modifier.isPrivate(mod)) {
            continue;
        }
        MethodVisitor mv = clazzNode.visitMethod(mod, "<init>", descr, null,
                ASMHelper.getExceptionTypes(constructor));

        // Call super constructor
        mv.visitCode();
        // load this
        mv.visitVarInsn(ALOAD, 0);
        Class<?>[] parameters = constructor.getParameterTypes();
        for (int i = 0; i < constructor.getParameterCount(); i++) {
            // variables
            mv.visitVarInsn(Type.getType(parameters[i]).getOpcode(ILOAD), i + 1);
        }
        mv.visitMethodInsn(INVOKESPECIAL, Type.getInternalName(baseClazz), "<init>", descr, false);
        // return
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

    // Add methods
    for (Class<?> intf : intfComponentMap.keySet()) {
        // Create class constant
        Type clazzConst = Type.getType(intf.getClass());

        for (Method m : intf.getMethods()) {
            boolean isVoid = m.getReturnType() == null;
            String descr = Type.getMethodDescriptor(m);

            MethodVisitor mv = clazzNode.visitMethod(ACC_PUBLIC, m.getName(), descr, null,
                    ASMHelper.getExceptionTypes(m));
            mv.visitCode();

            // load block instance
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, classname, "$$_provider", Type.getDescriptor(ComponentProvider.class));
            mv.visitLdcInsn(clazzConst);
            // load component instance
            mv.visitMethodInsn(INVOKEVIRTUAL, Type.getInternalName(ComponentProvider.class), "get",
                    Type.getMethodDescriptor(Type.getType(Component.class), Type.getType(Class.class)), false);

            // add parameters
            Class<?>[] parameters = m.getParameterTypes();
            for (int i = 0; i < m.getParameterCount(); i++) {
                mv.visitVarInsn(Type.getType(parameters[i]).getOpcode(ILOAD), i + 1);
            }

            // invoke
            mv.visitMethodInsn(INVOKEINTERFACE, Type.getInternalName(intf), m.getName(), descr, true);
            mv.visitInsn(isVoid ? RETURN : Type.getType(m.getReturnType()).getOpcode(IRETURN));
            mv.visitMaxs(0, 0);
            mv.visitEnd();
        }
    }

    clazzNode.visitEnd();

    return ASMHelper.defineClass(clazzNode, ClassWriter.COMPUTE_MAXS, baseClazz.getProtectionDomain());
}

From source file:one.nio.gen.BytecodeGenerator.java

License:Apache License

public static void emitThrow(MethodVisitor mv, String exceptionClass, String message) {
    mv.visitTypeInsn(NEW, exceptionClass);
    mv.visitInsn(DUP);/*from   w ww. j av  a 2  s.  c  om*/
    mv.visitLdcInsn(message);
    mv.visitMethodInsn(INVOKESPECIAL, exceptionClass, "<init>", "(Ljava/lang/String;)V");
    mv.visitInsn(ATHROW);
}

From source file:one.nio.gen.BytecodeGenerator.java

License:Apache License

public static void emitInt(MethodVisitor mv, int c) {
    if (c >= -1 && c <= 5) {
        mv.visitInsn(ICONST_0 + c);/*w  ww .j a v  a 2s. c  o  m*/
    } else if (c >= Byte.MIN_VALUE && c <= Byte.MAX_VALUE) {
        mv.visitIntInsn(BIPUSH, c);
    } else if (c >= Short.MIN_VALUE && c <= Short.MAX_VALUE) {
        mv.visitIntInsn(SIPUSH, c);
    } else {
        mv.visitLdcInsn(c);
    }
}

From source file:one.nio.gen.BytecodeGenerator.java

License:Apache License

public static void emitLong(MethodVisitor mv, long c) {
    if (c >= 0 && c <= 1) {
        mv.visitInsn(LCONST_0 + (int) c);
    } else {//ww w. j a  v  a2  s  .  com
        mv.visitLdcInsn(c);
    }
}

From source file:one.nio.gen.BytecodeGenerator.java

License:Apache License

public static void emitFloat(MethodVisitor mv, float c) {
    if (c == 0.0f) {
        mv.visitInsn(FCONST_0);//from  ww w . j ava2  s  .co  m
    } else if (c == 1.0f) {
        mv.visitInsn(FCONST_1);
    } else if (c == 2.0f) {
        mv.visitInsn(FCONST_2);
    } else {
        mv.visitLdcInsn(c);
    }
}

From source file:one.nio.gen.BytecodeGenerator.java

License:Apache License

public static void emitDouble(MethodVisitor mv, double c) {
    if (c == 0.0) {
        mv.visitInsn(DCONST_0);/*from   w  ww . j  ava2  s .  c  o m*/
    } else if (c == 1.0) {
        mv.visitInsn(DCONST_1);
    } else {
        mv.visitLdcInsn(c);
    }
}

From source file:one.nio.http.gen.RequestHandlerGenerator.java

License:Apache License

private void setupParam(MethodVisitor mv, Class type, Param param) {
    String name = param.value();/* w ww . j  av a  2  s .c  o m*/
    String defaultValue = null;
    int eq = name.indexOf('=');
    if (eq > 0) {
        defaultValue = name.substring(eq + 1);
        name = name.substring(0, eq);
    }

    mv.visitVarInsn(ALOAD, 1);
    mv.visitLdcInsn(name + '=');

    boolean needNullCheck = false;
    if (param.required()) {
        mv.visitMethodInsn(INVOKEVIRTUAL, "one/nio/http/Request", "getRequiredParameter",
                "(Ljava/lang/String;)Ljava/lang/String;");
    } else if (defaultValue != null) {
        mv.visitLdcInsn(defaultValue);
        mv.visitMethodInsn(INVOKEVIRTUAL, "one/nio/http/Request", "getParameter",
                "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;");
    } else {
        mv.visitMethodInsn(INVOKEVIRTUAL, "one/nio/http/Request", "getParameter",
                "(Ljava/lang/String;)Ljava/lang/String;");
        needNullCheck = true;
    }

    convertArgument(mv, type, needNullCheck);
}