Example usage for org.objectweb.asm Opcodes ACC_STATIC

Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes ACC_STATIC.

Prototype

int ACC_STATIC

To view the source code for org.objectweb.asm Opcodes ACC_STATIC.

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Usage

From source file:co.cask.cdap.internal.app.runtime.batch.distributed.ContainerLauncherGenerator.java

License:Apache License

/**
 * Generates the bytecode for a main class and writes to the given {@link JarOutputStream}.
 * The generated class looks like this://from  ww  w  .j  a  v  a 2  s  .  co m
 *
 * <pre>{@code
 * class className {
 *   public static void main(String[] args) {
 *     MapReduceContainerLauncher.launch(launcherClassPath, classLoaderName, className, args);
 *   }
 * }
 * }
 * </pre>
 *
 * The {@code launcherClassPath}, {@code classLoaderName} and {@code className} are represented as
 * string literals in the generated class.
 */
private static void generateLauncherClass(String launcherClassPath, String classLoaderName, String className,
        JarOutputStream output) throws IOException {
    String internalName = className.replace('.', '/');

    ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
    classWriter.visit(Opcodes.V1_7, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, internalName, null,
            Type.getInternalName(Object.class), null);

    Method constructor = Methods.getMethod(void.class, "<init>");

    // Constructor
    // MRAppMaster()
    GeneratorAdapter mg = new GeneratorAdapter(Opcodes.ACC_PUBLIC, constructor, null, null, classWriter);

    mg.loadThis();
    mg.invokeConstructor(Type.getType(Object.class), constructor);
    mg.returnValue();
    mg.endMethod();

    // Main method.
    // public static void main(String[] args) {
    //   MapReduceContainerLauncher.launch(launcherClassPath, classLoaderName, className, args);
    // }
    Method mainMethod = Methods.getMethod(void.class, "main", String[].class);
    mg = new GeneratorAdapter(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, mainMethod, null,
            new Type[] { Type.getType(Exception.class) }, classWriter);

    mg.getStatic(Type.getType(System.class), "out", Type.getType(PrintStream.class));
    mg.visitLdcInsn("Launch class " + className);
    mg.invokeVirtual(Type.getType(PrintStream.class), Methods.getMethod(void.class, "println", String.class));

    // The Launcher classpath, classloader name and main classname are stored as string literal in the generated class
    mg.visitLdcInsn(launcherClassPath);
    mg.visitLdcInsn(classLoaderName);
    mg.visitLdcInsn(className);
    mg.loadArg(0);
    mg.invokeStatic(Type.getType(MapReduceContainerLauncher.class),
            Methods.getMethod(void.class, "launch", String.class, String.class, String.class, String[].class));
    mg.returnValue();
    mg.endMethod();

    classWriter.visitEnd();

    output.putNextEntry(new JarEntry(internalName + ".class"));
    output.write(classWriter.toByteArray());
}

---

From source file:co.cask.cdap.internal.app.runtime.batch.distributed.ContainerLauncherGenerator.java

License:Apache License

/**
 * Generates a class that has a static main method which delegates the call to a static method in the given delegator
 * class with method signature {@code public static void launch(String className, String[] args)}
 *
 * @param className the classname of the generated class
 * @param mainDelegator the class to delegate the main call to
 * @param output for writing the generated bytes
 *///from  w  ww  . j  a  v a2 s  .co  m
private static void generateMainClass(String className, Type mainDelegator, JarOutputStream output)
        throws IOException {
    String internalName = className.replace('.', '/');

    ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
    classWriter.visit(Opcodes.V1_7, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, internalName, null,
            Type.getInternalName(Object.class), null);

    // Generate the default constructor, which just call super()
    Method constructor = Methods.getMethod(void.class, "<init>");
    GeneratorAdapter mg = new GeneratorAdapter(Opcodes.ACC_PUBLIC, constructor, null, null, classWriter);
    mg.loadThis();
    mg.invokeConstructor(Type.getType(Object.class), constructor);
    mg.returnValue();
    mg.endMethod();

    // Generate the main method
    // public static void main(String[] args) {
    //   System.out.println("Launch class .....");
    //   <MainDelegator>.launch(<className>, args);
    // }
    Method mainMethod = Methods.getMethod(void.class, "main", String[].class);
    mg = new GeneratorAdapter(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, mainMethod, null,
            new Type[] { Type.getType(Exception.class) }, classWriter);

    mg.getStatic(Type.getType(System.class), "out", Type.getType(PrintStream.class));
    mg.visitLdcInsn("Launch class " + className + " by calling " + mainDelegator.getClassName() + ".launch");
    mg.invokeVirtual(Type.getType(PrintStream.class), Methods.getMethod(void.class, "println", String.class));

    // The main classname is stored as string literal in the generated class
    mg.visitLdcInsn(className);
    mg.loadArg(0);
    mg.invokeStatic(mainDelegator, Methods.getMethod(void.class, "launch", String.class, String[].class));
    mg.returnValue();
    mg.endMethod();

    classWriter.visitEnd();

    output.putNextEntry(new JarEntry(internalName + ".class"));
    output.write(classWriter.toByteArray());
}

---

From source file:co.cask.cdap.internal.app.runtime.service.http.HttpHandlerGenerator.java

License:Apache License

/**
 * Generates a static Logger field for logging and a static initialization block to initialize the logger.
 *//*from  w ww . j a v a2 s.  c  o  m*/
private void generateLogger(Type classType, ClassWriter classWriter) {
    // private static final Logger LOG = LoggerFactory.getLogger(classType);
    classWriter.visitField(Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC | Opcodes.ACC_FINAL, "LOG",
            Type.getType(Logger.class).getDescriptor(), null, null);
    Method init = Methods.getMethod(void.class, "<clinit>");
    GeneratorAdapter mg = new GeneratorAdapter(Opcodes.ACC_STATIC, init, null, null, classWriter);
    mg.visitLdcInsn(classType);
    mg.invokeStatic(Type.getType(LoggerFactory.class),
            Methods.getMethod(Logger.class, "getLogger", Class.class));
    mg.putStatic(classType, "LOG", Type.getType(Logger.class));
    mg.returnValue();
    mg.endMethod();
}

---

From source file:co.cask.cdap.internal.io.DatumWriterGenerator.java

License:Apache License

/**
 * Generates a {@link DatumWriter} class for encoding data of the given output type with the given schema.
 * @param outputType Type information of the output data type.
 * @param schema Schema of the output data type.
 * @return A {@link co.cask.cdap.internal.asm.ClassDefinition} that contains generated class information.
 *///from w  w  w .j  av a2s  . co m
ClassDefinition generate(TypeToken<?> outputType, Schema schema) {
    classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
    preservedClasses = Lists.newArrayList();

    TypeToken<?> interfaceType = getInterfaceType(outputType);

    // Generate the class
    String className = getClassName(interfaceType, schema);
    classType = Type.getObjectType(className);
    classWriter.visit(Opcodes.V1_6, Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL, className,
            Signatures.getClassSignature(interfaceType), Type.getInternalName(Object.class),
            new String[] { Type.getInternalName(interfaceType.getRawType()) });

    // Static schema hash field, for verification
    classWriter.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC + Opcodes.ACC_FINAL, "SCHEMA_HASH",
            Type.getDescriptor(String.class), null, schema.getSchemaHash().toString()).visitEnd();

    // Schema field
    classWriter.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_FINAL, "schema", Type.getDescriptor(Schema.class),
            null, null).visitEnd();

    // Encode method
    generateEncode(outputType, schema);

    // Constructor
    generateConstructor();

    ClassDefinition classDefinition = new ClassDefinition(classWriter.toByteArray(), className,
            preservedClasses);
    // DEBUG block. Uncomment for debug
    //    co.cask.cdap.internal.asm.Debugs.debugByteCode(classDefinition, new java.io.PrintWriter(System.out));
    // End DEBUG block
    return classDefinition;
}

---

From source file:co.cask.common.internal.io.DatumWriterGenerator.java

License:Apache License

/**
 * Generates a {@link DatumWriter} class for encoding data of the given output type with the given schema.
 * @param outputType Type information of the output data type.
 * @param schema Schema of the output data type.
 * @return A {@link co.cask.common.internal.asm.ClassDefinition} that contains generated class information.
 *///from   www  . ja  v  a2 s .  co m
ClassDefinition generate(TypeToken<?> outputType, Schema schema) {
    classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
    preservedClasses = Lists.newArrayList();

    TypeToken<?> interfaceType = getInterfaceType(outputType);

    // Generate the class
    String className = getClassName(interfaceType, schema);
    classType = Type.getObjectType(className);
    classWriter.visit(Opcodes.V1_6, Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL, className,
            Signatures.getClassSignature(interfaceType), Type.getInternalName(Object.class),
            new String[] { Type.getInternalName(interfaceType.getRawType()) });

    // Static schema hash field, for verification
    classWriter.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC + Opcodes.ACC_FINAL, "SCHEMA_HASH",
            Type.getDescriptor(String.class), null, schema.getSchemaHash().toString()).visitEnd();

    // Schema field
    classWriter.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_FINAL, "schema", Type.getDescriptor(Schema.class),
            null, null).visitEnd();

    // Encode method
    generateEncode(outputType, schema);

    // Constructor
    generateConstructor();

    ClassDefinition classDefinition = new ClassDefinition(classWriter.toByteArray(), className,
            preservedClasses);
    // DEBUG block. Uncomment for debug
    //    co.cask.common.internal.asm.Debugs.debugByteCode(classDefinition, new java.io.PrintWriter(System.out));
    // End DEBUG block
    return classDefinition;
}

---

From source file:co.cask.tigon.internal.io.DatumWriterGenerator.java

License:Apache License

/**
 * Generates a {@link DatumWriter} class for encoding data of the given output type with the given schema.
 * @param outputType Type information of the output data type.
 * @param schema Schema of the output data type.
 * @return A {@link co.cask.tigon.internal.asm.ClassDefinition} that contains generated class information.
 *///from  w  ww. j  ava  2 s  .c  o m
ClassDefinition generate(TypeToken<?> outputType, Schema schema) {
    classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES);

    TypeToken<?> interfaceType = getInterfaceType(outputType);

    // Generate the class
    String className = getClassName(interfaceType, schema);
    classType = Type.getObjectType(className);
    classWriter.visit(Opcodes.V1_6, Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL, className,
            Signatures.getClassSignature(interfaceType), Type.getInternalName(Object.class),
            new String[] { Type.getInternalName(interfaceType.getRawType()) });

    // Static schema hash field, for verification
    classWriter.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_STATIC + Opcodes.ACC_FINAL, "SCHEMA_HASH",
            Type.getDescriptor(String.class), null, schema.getSchemaHash().toString()).visitEnd();

    // Schema field
    classWriter.visitField(Opcodes.ACC_PRIVATE + Opcodes.ACC_FINAL, "schema", Type.getDescriptor(Schema.class),
            null, null).visitEnd();

    // Encode method
    generateEncode(outputType, schema);

    // Constructor
    generateConstructor();

    ClassDefinition classDefinition = new ClassDefinition(classWriter.toByteArray(), className);
    // DEBUG block. Uncomment for debug
    //    co.cask.tigon.internal.asm.Debugs.debugByteCode(classDefinition, new java.io.PrintWriter(System.out));
    // End DEBUG block
    return classDefinition;
}

---

From source file:co.paralleluniverse.fibers.instrument.InstrumentMethod.java

License:Open Source License

public InstrumentMethod(MethodDatabase db, String className, MethodNode mn) throws AnalyzerException {
    this.db = db;
    this.className = className;
    this.mn = mn;

    try {//from   w  w w.  ja  v  a  2  s.  co  m
        Analyzer a = new TypeAnalyzer(db);
        this.frames = a.analyze(className, mn);
        this.lvarStack = mn.maxLocals;
        this.lvarResumed = mn.maxLocals + 1;
        this.lvarInvocationReturnValue = mn.maxLocals + 2;
        // this.lvarSuspendableCalled = (verifyInstrumentation ? mn.maxLocals + 3 : -1);
        this.firstLocal = ((mn.access & Opcodes.ACC_STATIC) == Opcodes.ACC_STATIC) ? 0 : 1;
    } catch (UnsupportedOperationException ex) {
        throw new AnalyzerException(null, ex.getMessage(), ex);
    }
}

---

From source file:com.alibaba.hotswap.meta.MetaInfo.java

License:Open Source License

public boolean isStatic() {
    return (access & Opcodes.ACC_STATIC) == Opcodes.ACC_STATIC;
}

---

From source file:com.alibaba.hotswap.processor.clinit.ClinitVisitor.java

License:Open Source License

@Override
public void visitEnd() {
    // If no clinit method, then add it
    if (!hasClinitMethod) {
        if (!isInterface) {
            int access = Opcodes.ACC_STATIC + Opcodes.ACC_PUBLIC;
            String name = HotswapConstants.HOTSWAP_CLINIT;
            String desc = "()V";
            MethodVisitor mv = super.visitMethod(access, name, desc, null, null);
            if (mv != null) {
                mv.visitCode();/*from  www. j a v a 2s.c  o m*/
                mv.visitTypeInsn(Opcodes.NEW, "java/util/concurrent/ConcurrentHashMap");
                mv.visitInsn(Opcodes.DUP);
                mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/util/concurrent/ConcurrentHashMap", "<init>",
                        "()V");
                mv.visitFieldInsn(Opcodes.PUTSTATIC, className, HotswapConstants.STATIC_FIELD_HOLDER,
                        "Ljava/util/concurrent/ConcurrentHashMap;");

                mv.visitInsn(Opcodes.RETURN);
                mv.visitMaxs(2, 0);
                mv.visitEnd();
            }

            generateClinit();
        } else {
            generateDefaultClinit();
        }
    } else {
        if (!isInterface) {
            generateClinit();
        }
    }

    super.visitEnd();
}

---

From source file:com.alibaba.hotswap.processor.clinit.ClinitVisitor.java

License:Open Source License

/**
 * Generate <code>&lt;clinit&gt;</code>, call <code>__$$hotswap_clinit$$__</code>
 *///from   w w w.ja v a 2s.  c om
private void generateClinit() {
    MethodVisitor clinit = cv.visitMethod(Opcodes.ACC_STATIC, HotswapConstants.CLINIT, "()V", null, null);
    if (clinit != null) {
        clinit.visitCode();

        clinit.visitMethodInsn(Opcodes.INVOKESTATIC, className, HotswapConstants.HOTSWAP_CLINIT, "()V");
        clinit.visitInsn(Opcodes.RETURN);
        clinit.visitMaxs(0, 0);
        clinit.visitEnd();
    }
}

---

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