Example usage for org.objectweb.asm Label Label

List of usage examples for org.objectweb.asm Label Label

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Introduction

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

Prototype

public Label()

Source Link

Document

Constructs a new label.

Usage

From source file:com.centimia.orm.jaqu.ext.asm.JaquClassAdapter.java

License:Open Source License

/**
 * Generates the new method body, copy the old to a new method and connect them.
 * the structure of the new method is:<br>
 * <br><b><div style="background:lightgray">
 * <pre>//from w  w w.j  a  v  a  2  s .c o  m
 * public [entityType] [getterName]() {
 *   if ([field] == null) {
 *      try {
 *         if (null == db)
 *            throw new RuntimeException("Cannot initialize 'Relation' outside an open session!!!. Try initializing field directly within the class.");
 *         
 *         [parentType] parent = this.getClass().newInstance();
 *         [entityType] desc = TestB.class.newInstance();
 *         
 *         // get the primary key
 *         Object pk = db.getPrimaryKey(this);
 *         
 *         // get the object
 *         [entityValue] = db.from(desc).innerJoin(parent).on(parent.[entityValue]).is(desc).where(db.getPrimaryKey(parent)).is(pk).selectFirst();
 *      }
 *      catch (Exception e) {
 *         if (e instanceof RuntimeException)
 *            throw (RuntimeException)e;
 *         throw new RuntimeException(e.getMessage(), e);
 *      }
 *   }
 *   return $orig_[getterName]();
 *  }
 * </pre>
 * </div>
 * 
 * @param access
 * @param desc
 * @param exceptions
 * @param name - current method name
 * @param newName - new method name (the orig...)
 * @param fieldName
 */
public void generateLazyRelation(int access, String desc, String[] exceptions, String name, String newName,
        String fieldName) {
    MethodVisitor mv = cv.visitMethod(access, name, desc, null, exceptions);
    String fieldSignature = desc.substring(desc.indexOf(')') + 1);
    String fieldClassName = desc.substring(desc.indexOf(')') + 2, desc.length() - 1);

    mv.visitCode();
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Exception");
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, fieldName, fieldSignature);
    Label l3 = new Label();
    mv.visitJumpInsn(IFNULL, l3);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, fieldName, fieldSignature);
    mv.visitFieldInsn(GETFIELD, fieldClassName, "isLazy", "Z");
    mv.visitJumpInsn(IFEQ, l3);
    mv.visitLabel(l0);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, "db", "Lcom/centimia/orm/jaqu/Db;");
    Label l4 = new Label();
    mv.visitJumpInsn(IFNULL, l4);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, "db", "Lcom/centimia/orm/jaqu/Db;");
    mv.visitMethodInsn(INVOKEVIRTUAL, "com/centimia/orm/jaqu/Db", "isClosed", "()Z", false);
    Label l5 = new Label();
    mv.visitJumpInsn(IFEQ, l5);
    mv.visitLabel(l4);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitTypeInsn(NEW, "java/lang/RuntimeException");
    mv.visitInsn(DUP);
    mv.visitLdcInsn(
            "Cannot initialize 'Relation' outside an open session!!!. Try initializing field directly within the class.");
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/RuntimeException", "<init>", "(Ljava/lang/String;)V", false);
    mv.visitInsn(ATHROW);
    mv.visitLabel(l5);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "getClass", "()Ljava/lang/Class;", false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "newInstance", "()Ljava/lang/Object;", false);
    mv.visitTypeInsn(CHECKCAST, className);
    mv.visitVarInsn(ASTORE, 1);
    mv.visitLdcInsn(Type.getType(fieldSignature));
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "newInstance", "()Ljava/lang/Object;", false);
    mv.visitTypeInsn(CHECKCAST, fieldClassName);
    mv.visitVarInsn(ASTORE, 2);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, "db", "Lcom/centimia/orm/jaqu/Db;");
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEVIRTUAL, "com/centimia/orm/jaqu/Db", "getPrimaryKey",
            "(Ljava/lang/Object;)Ljava/lang/Object;", false);
    mv.visitVarInsn(ASTORE, 3);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, "db", "Lcom/centimia/orm/jaqu/Db;");
    mv.visitVarInsn(ALOAD, 2);
    mv.visitMethodInsn(INVOKEVIRTUAL, "com/centimia/orm/jaqu/Db", "from",
            "(Ljava/lang/Object;)Lcom/centimia/orm/jaqu/QueryInterface;", false);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEINTERFACE, "com/centimia/orm/jaqu/QueryInterface", "innerJoin",
            "(Ljava/lang/Object;)Lcom/centimia/orm/jaqu/QueryJoin;", true);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitFieldInsn(GETFIELD, className, fieldName, fieldSignature);
    mv.visitMethodInsn(INVOKEVIRTUAL, "com/centimia/orm/jaqu/QueryJoin", "on",
            "(Ljava/lang/Object;)Lcom/centimia/orm/jaqu/QueryJoinCondition;", false);
    mv.visitVarInsn(ALOAD, 2);
    mv.visitMethodInsn(INVOKEVIRTUAL, "com/centimia/orm/jaqu/QueryJoinCondition", "is",
            "(Ljava/lang/Object;)Lcom/centimia/orm/jaqu/QueryJoinWhere;", false);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, "db", "Lcom/centimia/orm/jaqu/Db;");
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, "com/centimia/orm/jaqu/Db", "getPrimaryKey",
            "(Ljava/lang/Object;)Ljava/lang/Object;", false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "com/centimia/orm/jaqu/QueryJoinWhere", "where",
            "(Ljava/lang/Object;)Lcom/centimia/orm/jaqu/QueryCondition;", false);
    mv.visitVarInsn(ALOAD, 3);
    mv.visitMethodInsn(INVOKEVIRTUAL, "com/centimia/orm/jaqu/QueryCondition", "is",
            "(Ljava/lang/Object;)Lcom/centimia/orm/jaqu/QueryWhere;", false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "com/centimia/orm/jaqu/QueryWhere", "selectFirst", "()Ljava/lang/Object;",
            false);
    mv.visitTypeInsn(CHECKCAST, fieldClassName);
    mv.visitFieldInsn(PUTFIELD, className, fieldName, fieldSignature);
    mv.visitLabel(l1);
    mv.visitJumpInsn(GOTO, l3);
    mv.visitLabel(l2);
    mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] { "java/lang/Exception" });
    mv.visitVarInsn(ASTORE, 1);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(INSTANCEOF, "java/lang/RuntimeException");
    Label l6 = new Label();
    mv.visitJumpInsn(IFEQ, l6);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(CHECKCAST, "java/lang/RuntimeException");
    mv.visitInsn(ATHROW);
    mv.visitLabel(l6);
    mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] { "java/lang/Exception" }, 0, null);
    mv.visitTypeInsn(NEW, "java/lang/RuntimeException");
    mv.visitInsn(DUP);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Exception", "getMessage", "()Ljava/lang/String;", false);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/RuntimeException", "<init>",
            "(Ljava/lang/String;Ljava/lang/Throwable;)V", false);
    mv.visitInsn(ATHROW);
    mv.visitLabel(l3);
    mv.visitFrame(Opcodes.F_CHOP, 1, null, 0, null);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEVIRTUAL, className, newName, desc, false);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(4, 4);
    mv.visitEnd();
}

From source file:com.changingbits.Builder.java

License:Apache License

private void buildAsm(GeneratorAdapter gen, Node node, int uptoLocal) {

    if (node.outputs != null) {
        //System.out.println("gen outputs=" + node.outputs);
        // Increment any range outputs at the current node:
        for (int range : node.outputs) {
            // Load arg 1 (the int[] answers):
            gen.loadArg(1);//from  www .  j a  va2 s.c o m
            // Load the index we will store to
            gen.loadLocal(uptoLocal, Type.INT_TYPE);
            // The range value we will store:
            gen.push(range);
            // Store it
            gen.arrayStore(Type.INT_TYPE);
            // Increment our upto:
            gen.iinc(uptoLocal, 1);
        }
    }

    if (node.left != null && (node.left.hasOutputs || node.right.hasOutputs)) {
        assert node.left.end + 1 == node.right.start;
        if (node.left.hasOutputs && node.right.hasOutputs) {
            // Recurse on either left or right
            Label labelLeft = new Label();
            Label labelEnd = new Label();
            gen.loadArg(0);
            gen.push(node.left.end);

            gen.ifCmp(Type.LONG_TYPE, GeneratorAdapter.LE, labelLeft);
            buildAsm(gen, node.right, uptoLocal);
            gen.goTo(labelEnd);
            gen.visitLabel(labelLeft);
            buildAsm(gen, node.left, uptoLocal);
            gen.visitLabel(labelEnd);
        } else if (node.left.hasOutputs) {
            // Recurse only on left
            Label labelEnd = new Label();
            gen.loadArg(0);
            gen.push(node.left.end);

            gen.ifCmp(Type.LONG_TYPE, GeneratorAdapter.GT, labelEnd);
            buildAsm(gen, node.left, uptoLocal);
            gen.visitLabel(labelEnd);
        } else {
            // Recurse only on right
            Label labelEnd = new Label();
            gen.loadArg(0);
            gen.push(node.left.end);

            gen.ifCmp(Type.LONG_TYPE, GeneratorAdapter.LE, labelEnd);
            buildAsm(gen, node.right, uptoLocal);
            gen.visitLabel(labelEnd);
        }
    }
}

From source file:com.changingbits.Builder.java

License:Apache License

/** Increments counts as field members (count0, count1,
 *  ...) instead of a this.intArray[0], ... */
private void buildCounterAsm2(GeneratorAdapter gen, Node node, boolean sawOutputs) {

    sawOutputs |= node.outputs != null;/*from  w w  w .  j ava  2 s .c  o m*/

    if (node.left != null) {
        assert node.left.end + 1 == node.right.start;
        // Recurse on either left or right
        Label labelLeft = new Label();
        Label labelEnd = new Label();
        gen.loadArg(0);
        gen.push(node.left.end);

        gen.ifCmp(Type.LONG_TYPE, GeneratorAdapter.LE, labelLeft);
        buildCounterAsm2(gen, node.right, sawOutputs);
        gen.goTo(labelEnd);
        gen.visitLabel(labelLeft);
        buildCounterAsm2(gen, node.left, sawOutputs);
        gen.visitLabel(labelEnd);
    } else if (sawOutputs) {
        // leaf: this.countN++
        gen.loadThis();
        gen.loadThis();
        gen.getField(COMPILED_COUNTER_CLASS2_TYPE, "count" + node.leafIndex, Type.INT_TYPE);
        gen.push(1);
        gen.visitInsn(Opcodes.IADD);
        gen.putField(COMPILED_COUNTER_CLASS2_TYPE, "count" + node.leafIndex, Type.INT_TYPE);
    }
}

From source file:com.changingbits.Builder.java

License:Apache License

private void buildCounterAsm(GeneratorAdapter gen, Node node, boolean sawOutputs) {

    sawOutputs |= node.outputs != null;/*from   w  ww .  j  av  a  2 s  . c o m*/

    if (node.left != null) {
        assert node.left.end + 1 == node.right.start;
        // Recurse on either left or right
        Label labelLeft = new Label();
        Label labelEnd = new Label();
        gen.loadArg(0);
        gen.push(node.left.end);

        gen.ifCmp(Type.LONG_TYPE, GeneratorAdapter.LE, labelLeft);
        buildCounterAsm(gen, node.right, sawOutputs);
        gen.goTo(labelEnd);
        gen.visitLabel(labelLeft);
        buildCounterAsm(gen, node.left, sawOutputs);
        gen.visitLabel(labelEnd);
    } else if (sawOutputs) {
        // leaf: elementaryCounts[node.leafIndex]++
        gen.loadThis();
        gen.getField(BASE_LONG_RANGE_COUNTER_TYPE, "elementaryCounts", INT_ARRAY_TYPE);
        gen.push(node.leafIndex);
        gen.dup2();
        gen.arrayLoad(Type.INT_TYPE);
        gen.push(1);
        gen.visitInsn(Opcodes.IADD);
        gen.arrayStore(Type.INT_TYPE);
    }
}

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

protected void generateWriteStaticGroup(Schema schema, ClassVisitor cv, String genClassInternalName,
        boolean javaClassCodec) {
    // method writeStaticGroupWithId - switch
    MethodVisitor mv = cv.visitMethod(ACC_PROTECTED, "writeStaticGroupWithId",
            "(Lcom/cinnober/msgcodec/io/ByteSink;Ljava/lang/Object;)V", null,
            new String[] { "java/io/IOException" });
    int nextVar = 3;
    mv.visitCode();/*from   w w  w . j  av  a  2 s.  c  om*/

    mv.visitVarInsn(ALOAD, 2);
    if (javaClassCodec) {
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "getClass", "()Ljava/lang/Class;", false);
    } else {
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, genClassInternalName, "groupTypeAccessor",
                "Lcom/cinnober/msgcodec/GroupTypeAccessor;");
        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKEINTERFACE, "com/cinnober/msgcodec/GroupTypeAccessor", "getGroupType",
                "(Ljava/lang/Object;)Ljava/lang/Object;", true);
    }
    int groupTypeVar = nextVar++;
    mv.visitInsn(DUP);
    mv.visitVarInsn(ASTORE, groupTypeVar);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "hashCode", "()I", false);

    // switch on class.hashCode()
    Map<Integer, ObjectHashCodeSwitchCase<Object>> casesByHashCode = new TreeMap<>();
    Map<Integer, Label> labelsByGroupId = new TreeMap<>();
    for (GroupDef group : schema.getGroups()) {
        Object groupType = group.getGroupType();
        int groupHash = groupType.hashCode();
        ObjectHashCodeSwitchCase<Object> hashCase = casesByHashCode.get(groupHash);
        if (hashCase == null) {
            hashCase = new ObjectHashCodeSwitchCase<>(groupHash);
            casesByHashCode.put(hashCase.hashCode, hashCase);
        }
        hashCase.add(groupType);
    }

    Label unknownHashLabel = new Label();
    {
        int[] caseValues = new int[casesByHashCode.size()];
        int i = 0;
        for (int hashCode : casesByHashCode.keySet()) {
            caseValues[i++] = hashCode;
        }
        Label[] caseLabels = new Label[casesByHashCode.size()];
        i = 0;
        for (ObjectHashCodeSwitchCase<Object> hashCase : casesByHashCode.values()) {
            caseLabels[i++] = hashCase.label;
        }
        mv.visitLookupSwitchInsn(unknownHashLabel, caseValues, caseLabels);
    }
    for (ObjectHashCodeSwitchCase<Object> hashCase : casesByHashCode.values()) {
        mv.visitLabel(hashCase.label);
        mv.visitFrame(F_SAME, 0, null, 0, null);
        for (ObjectSwitchCase<Object> classCase : hashCase.cases) {
            GroupDef group = schema.getGroup(classCase.object);
            int groupId = schema.getGroup(classCase.object).getId();
            if (groupId != -1) {
                labelsByGroupId.put(groupId, classCase.label);
            }

            mv.visitVarInsn(ALOAD, groupTypeVar);
            if (javaClassCodec) {
                mv.visitLdcInsn(getJavaType(classCase.object));
                mv.visitJumpInsn(IF_ACMPEQ, classCase.label);
            } else {
                mv.visitVarInsn(ALOAD, 0);
                mv.visitFieldInsn(GETFIELD, genClassInternalName, "groupType_" + group.getName(),
                        "Ljava/lang/Object;");
                mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "equals", "(Ljava/lang/Object;)Z", false);
                mv.visitJumpInsn(IFNE, classCase.label); // IFNE = if not false
            }
        }
    }
    // Default case for class hashcode switch, do lookup using schema.getGroup(Object)
    {
        Label unknownGroupIdLabel = new Label();
        mv.visitLabel(unknownHashLabel);
        mv.visitFrame(F_SAME, 0, null, 0, null);
        Label[] groupIdLabels = new Label[labelsByGroupId.size()];
        int[] groupIds = new int[groupIdLabels.length];

        {
            int i = 0;
            for (Entry<Integer, Label> entry : labelsByGroupId.entrySet()) {
                groupIds[i] = entry.getKey();
                groupIdLabels[i] = new Label();
                i++;
            }
        }

        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, genClassInternalName, "schema", "Lcom/cinnober/msgcodec/Schema;");

        mv.visitVarInsn(ALOAD, groupTypeVar);
        mv.visitMethodInsn(INVOKEVIRTUAL, SCHEMA_INAME, "getGroup",
                "(Ljava/lang/Object;)Lcom/cinnober/msgcodec/GroupDef;", false);

        // check for null result from getGroup
        Label noGroupDefLabel = new Label();
        mv.visitInsn(DUP);
        mv.visitJumpInsn(IFNULL, noGroupDefLabel);

        mv.visitMethodInsn(INVOKEVIRTUAL, GROUPDEF_INAME, "getId", "()I", false);

        // Switch on the group id
        mv.visitLookupSwitchInsn(unknownHashLabel, groupIds, groupIdLabels);

        // Cases for the group ids
        for (int i = 0; i < groupIds.length; i++) {
            mv.visitLabel(groupIdLabels[i]);
            mv.visitFrame(F_SAME, 0, null, 0, null);
            mv.visitJumpInsn(GOTO, labelsByGroupId.get(groupIds[i]));
        }

        mv.visitLabel(noGroupDefLabel);
        mv.visitFrame(F_SAME, 0, null, 0, null);
        mv.visitInsn(POP);

        // Throw exception if there is no match on class or group id
        mv.visitLabel(unknownGroupIdLabel);
        mv.visitFrame(F_SAME, 0, null, 0, null);
        mv.visitVarInsn(ALOAD, groupTypeVar);
        mv.visitMethodInsn(INVOKESTATIC, baseclassIName, "unknownGroupType",
                "(Ljava/lang/Object;)Ljava/lang/IllegalArgumentException;", false);
        mv.visitInsn(ATHROW);
    }

    // Generate the labeled calls to group writer methods
    for (ObjectHashCodeSwitchCase<Object> hashCase : casesByHashCode.values()) {
        for (ObjectSwitchCase<Object> classCase : hashCase.cases) {
            Object groupType = classCase.object;
            GroupDef group = schema.getGroup(groupType);
            String groupDescriptor = getTypeDescriptor(groupType, javaClassCodec);
            mv.visitLabel(classCase.label);
            mv.visitFrame(F_SAME, 0, null, 0, null);
            mv.visitVarInsn(ALOAD, 0); // this
            mv.visitVarInsn(ALOAD, 1); // out
            mv.visitVarInsn(ALOAD, 2); // obj
            if (javaClassCodec) {
                mv.visitTypeInsn(CHECKCAST, getTypeInternalName(groupType, javaClassCodec));
            }
            mv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "writeStaticGroupWithId_" + group.getName(),
                    "(Lcom/cinnober/msgcodec/io/ByteSink;" + groupDescriptor + ")V", false);
            mv.visitInsn(RETURN);
        }
    }

    mv.visitMaxs(4, nextVar);
    mv.visitEnd();
}

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

protected void generateReadStaticGroup(Schema schema, ClassVisitor cv, String genClassInternalName,
        boolean javaClassCodec) {
    MethodVisitor mv = cv.visitMethod(ACC_PROTECTED, "readStaticGroup",
            "(ILcom/cinnober/msgcodec/io/ByteSource;)Ljava/lang/Object;", null,
            new String[] { "java/io/IOException" });
    int nextVar = 3;
    mv.visitCode();/*  w  ww.j av  a  2  s  . co  m*/

    Map<Integer, Label> labelsByGroupId = new TreeMap<>();
    for (GroupDef group : schema.getGroups()) {
        if (group.getId() != -1) {
            labelsByGroupId.put(group.getId(), new Label());
        }
    }
    mv.visitVarInsn(ILOAD, 1); // group id
    Label unknownGroupIdLabel = new Label();
    {
        int[] caseValues = new int[labelsByGroupId.size()];
        int i = 0;
        for (int groupId : labelsByGroupId.keySet()) {
            caseValues[i++] = groupId;
        }
        Label[] caseLabels = labelsByGroupId.values().toArray(new Label[labelsByGroupId.size()]);
        mv.visitLookupSwitchInsn(unknownGroupIdLabel, caseValues, caseLabels);
    }

    for (Map.Entry<Integer, Label> caseEntry : labelsByGroupId.entrySet()) {
        GroupDef group = schema.getGroup(caseEntry.getKey().intValue());
        Object groupType = group.getGroupType();
        String groupDescriptor = getTypeDescriptor(groupType, javaClassCodec);

        mv.visitLabel(caseEntry.getValue());
        mv.visitFrame(F_SAME, 0, null, 0, null);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "readStaticGroup_" + group.getName(),
                "(Lcom/cinnober/msgcodec/io/ByteSource;)" + groupDescriptor, false);
        mv.visitInsn(ARETURN);
    }
    // default case
    mv.visitLabel(unknownGroupIdLabel);
    mv.visitFrame(F_SAME, 0, null, 0, null);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitMethodInsn(INVOKESTATIC, baseclassIName, "unknownGroupId",
            "(I)Lcom/cinnober/msgcodec/DecodeException;", false);
    mv.visitInsn(ATHROW);
    mv.visitMaxs(2, nextVar);
    mv.visitEnd();
}

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

protected void generateReadStaticGroupForType(final Schema schema, ClassVisitor cv,
        final String genClassInternalName, final boolean javaClassCodec) {
    for (final GroupDef group : schema.getGroups()) {
        Object groupType = group.getGroupType();
        String groupDescriptor = getTypeDescriptor(groupType, javaClassCodec);
        final MethodVisitor mv = cv.visitMethod(ACC_PRIVATE, "readStaticGroup_" + group.getName(),
                "(Lcom/cinnober/msgcodec/io/ByteSource;" + groupDescriptor + ")V", null,
                new String[] { "java/io/IOException" });
        mv.visitCode();//from  w w  w .  j  a  v  a  2  s  .  c  o m
        final LocalVariable nextVar = new LocalVariable(3);

        // read fields of super group
        if (group.getSuperGroup() != null) {
            GroupDef superGroup = schema.getGroup(group.getSuperGroup());
            Object superGroupType = superGroup.getGroupType();
            String superGroupDescriptor = getTypeDescriptor(superGroupType, javaClassCodec);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 1);
            mv.visitVarInsn(ALOAD, 2);
            mv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "readStaticGroup_" + superGroup.getName(),
                    "(Lcom/cinnober/msgcodec/io/ByteSource;" + superGroupDescriptor + ")V", false);
        }

        // fields
        for (final FieldDef field : group.getFields()) {
            final Class<?> javaClass = field.getJavaClass();

            Runnable readValue = () -> {
                Label tryStart = new Label();
                Label tryEnd = new Label();
                Label tryCatch = new Label();
                Label tryAfter = new Label();
                mv.visitTryCatchBlock(tryStart, tryEnd, tryCatch, "java/lang/Exception");

                mv.visitLabel(tryStart);
                mv.visitVarInsn(ALOAD, 1); // input stream
                generateDecodeValue(mv, 1, nextVar, field.isRequired(), field.getType(), javaClass,
                        field.getComponentJavaClass(), schema, genClassInternalName,
                        group.getName() + "_" + field.getName(), group.getName() + "." + field.getName(),
                        javaClassCodec);
                mv.visitLabel(tryEnd);
                mv.visitJumpInsn(GOTO, tryAfter);
                mv.visitLabel(tryCatch);
                int caughtExVar = nextVar.next();
                mv.visitVarInsn(ASTORE, caughtExVar);
                mv.visitTypeInsn(NEW, "com/cinnober/msgcodec/blink/FieldDecodeException");
                mv.visitInsn(DUP);
                mv.visitLdcInsn(field.getName());
                mv.visitVarInsn(ALOAD, caughtExVar);
                mv.visitMethodInsn(INVOKESPECIAL, "com/cinnober/msgcodec/blink/FieldDecodeException", "<init>",
                        "(Ljava/lang/String;Ljava/lang/Throwable;)V", false);
                mv.visitInsn(ATHROW);
                mv.visitLabel(tryAfter);
            };

            Accessor<?, ?> accessor = field.getAccessor();
            if (isPublicFieldAccessor(accessor)) {
                Field f = ((FieldAccessor) accessor).getField();
                mv.visitVarInsn(ALOAD, 2); // instance
                // value
                readValue.run();
                // store
                mv.visitFieldInsn(PUTFIELD, Type.getInternalName(f.getDeclaringClass()), f.getName(),
                        Type.getDescriptor(f.getType()));
            } else if (accessor.getClass() == CreateAccessor.class) {
                mv.visitVarInsn(ALOAD, 2); // instance

                Label tryStart = new Label();
                Label tryEnd = new Label();
                Label tryCatch = new Label();
                Label tryAfter = new Label();
                mv.visitTryCatchBlock(tryStart, tryEnd, tryCatch, "java/lang/Exception");

                mv.visitLabel(tryStart);
                mv.visitVarInsn(ALOAD, 1); // input stream

                generateDecodeDummy(mv, 1, nextVar, field.isRequired(), field.getType(), javaClass,
                        field.getComponentJavaClass(), schema, genClassInternalName,
                        group.getName() + "." + field.getName(), javaClassCodec);

                mv.visitInsn(POP);

                mv.visitLabel(tryEnd);
                mv.visitJumpInsn(GOTO, tryAfter);
                mv.visitLabel(tryCatch);
                int caughtExVar = nextVar.next();
                mv.visitVarInsn(ASTORE, caughtExVar);
                mv.visitTypeInsn(NEW, "com/cinnober/msgcodec/blink/FieldDecodeException");
                mv.visitInsn(DUP);
                mv.visitLdcInsn(field.getName());
                mv.visitVarInsn(ALOAD, caughtExVar);
                mv.visitMethodInsn(INVOKESPECIAL, "com/cinnober/msgcodec/blink/FieldDecodeException", "<init>",
                        "(Ljava/lang/String;Ljava/lang/Throwable;)V", false);
                mv.visitInsn(ATHROW);
                mv.visitLabel(tryAfter);

                mv.visitInsn(POP);
            } else {
                // accessor
                mv.visitVarInsn(ALOAD, 0);
                mv.visitFieldInsn(GETFIELD, genClassInternalName,
                        "accessor_" + group.getName() + "_" + field.getName(),
                        "Lcom/cinnober/msgcodec/Accessor;");
                // instance
                mv.visitVarInsn(ALOAD, 2); // instance
                // value
                readValue.run();
                if (javaClass.isPrimitive()) {
                    box(mv, javaClass);
                }
                // store
                mv.visitMethodInsn(INVOKEINTERFACE, "com/cinnober/msgcodec/Accessor", "setValue",
                        "(Ljava/lang/Object;Ljava/lang/Object;)V", true);
            }
        }

        mv.visitInsn(RETURN);
        mv.visitMaxs(6, nextVar.get());
        mv.visitEnd();
    }
}

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

/**
 * Generate instructions to encode the specified value type.
 * The values on the stack are; the output stream and the value to be encoded.
 * After this call these values are expected to be consumed.
 *
 * @param mv the method visitor, open for code instructions.
 * @param outputStreamVar the variable instance that contains the output stream.
 * @param nextVar the next variable/*from ww w. j  a  va 2 s  .com*/
 * @param required true if the field is required, otherwise false.
 * @param type the field type
 * @param javaClass the field java class
 * @param componentJavaClass the field component java class, or null if not a sequence type
 * @param schema the protocol schema, not null
 * @param genClassInternalName the internal name of the generated class
 */
protected void generateEncodeValue(MethodVisitor mv, int outputStreamVar, LocalVariable nextVar,
        boolean required, TypeDef type, Class<?> javaClass, Class<?> componentJavaClass, Schema schema,
        String genClassInternalName, String fieldIdentifier, String debugValueLabel, boolean javaClassCodec) {

    type = schema.resolveToType(type, false);
    GroupDef refGroup = schema.resolveToGroup(type);

    if (javaClass.isPrimitive() && !required) {
        box(mv, javaClass);
    } else if (!javaClass.isPrimitive() && required) {
        mv.visitInsn(DUP);
        Label notNullLabel = new Label();
        mv.visitJumpInsn(IFNONNULL, notNullLabel);
        mv.visitInsn(POP); // output stream
        mv.visitLdcInsn(debugValueLabel);
        mv.visitMethodInsn(INVOKESTATIC, baseclassIName, "missingRequiredValue",
                "(Ljava/lang/String;)Ljava/lang/IllegalArgumentException;", false);
        mv.visitInsn(ATHROW);
        mv.visitLabel(notNullLabel);
        unbox(mv, javaClass);
    }
    switch (type.getType()) {
    case INT8:
        generateEncodeInt8Value(required, mv);
        break;
    case UINT8:
        generateEncodeUInt8Value(required, mv);
        break;
    case CHAR:
        generateEncodeCharacterValue(required, mv);
        break;
    case INT16:
        generateEncodeInt16Value(required, mv);
        break;
    case UINT16:
        generateEncodeUInt16Value(required, mv);
        break;
    case INT32:
        generateEncodeInt32Value(required, mv);
        break;
    case UINT32:
        generateEncodeUInt32Value(required, mv);
        break;
    case INT64:
        generateEncodeInt64Value(required, mv);
        break;
    case UINT64:
        generateEncodeUInt64Value(required, mv);
        break;
    case FLOAT32:
        generateEncodeFloat32Value(required, mv);
        break;
    case FLOAT64:
        generateEncodeFloat64Value(required, mv);
        break;
    case BIGINT:
        generateEncodeBigIntValue(required, mv);
        break;
    case DECIMAL:
        generateEncodeDecimalValue(required, mv);
        break;
    case BIGDECIMAL:
        generateEncodeBigDecimalValue(required, mv);
        break;
    case STRING:
        generateEncodeStringValue((TypeDef.StringUnicode) type, required, mv);
        break;
    case BINARY:
        generateEncodeBinaryValue((TypeDef.Binary) type, required, mv);
        break;
    case BOOLEAN:
        generateEncodeBooleanValue(required, mv);
        break;
    case ENUM:
        generateEncodeEnumValue((TypeDef.Enum) type, genClassInternalName, fieldIdentifier, nextVar, javaClass,
                required, mv, debugValueLabel);
        break;
    case TIME:
        generateEncodeTimeValue((TypeDef.Time) type, javaClass, required, mv);
        break;
    case SEQUENCE:
        generateEncodeSequenceValue(javaClass, nextVar, mv, required, outputStreamVar, componentJavaClass, type,
                schema, genClassInternalName, fieldIdentifier, debugValueLabel, javaClassCodec);
        break;
    case REFERENCE:
        generateEncodeRefValue(refGroup, required, nextVar, mv, genClassInternalName, outputStreamVar,
                (TypeDef.Reference) type, javaClassCodec);
        break;
    case DYNAMIC_REFERENCE:
        generateEncodeDynRefValue(nextVar, mv, required);
        break;
    default:
        throw new RuntimeException("Unhandled case: " + type.getType());
    }
}

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

/**
 * Generate value encoding using the blink output.
 *
 * <p>Defaults to <code>writeUInt16Null].</code>
 *
 * @param required true if the field is required, otherwise false.
 * @param mv the method visitor, not null.
 * @see #generateEncodeValue//from ww w.j a v  a 2  s . c  o m
 */
protected void generateEncodeCharacterValue(boolean required, MethodVisitor mv) {
    if (required) {
        mv.visitInsn(I2S);
        mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writeUInt16",
                "(Lcom/cinnober/msgcodec/io/ByteSink;S)V", false);
    } else {
        Label nullLabel = new Label();
        mv.visitInsn(DUP);
        mv.visitJumpInsn(IFNULL, nullLabel);
        unbox(mv, Character.class);
        mv.visitInsn(I2S);
        box(mv, Short.class);
        mv.visitLabel(nullLabel);
        mv.visitTypeInsn(CHECKCAST, Type.getInternalName(Short.class));
        mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writeUInt16Null",
                "(Lcom/cinnober/msgcodec/io/ByteSink;Ljava/lang/Short;)V", false);
    }
}

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

protected void generateEncodeRefValue(GroupDef refGroup, boolean required, LocalVariable nextVar,
        MethodVisitor mv, String genClassInternalName, int outputStreamVar, TypeDef.Reference type,
        boolean javaClassCodec) throws IllegalArgumentException {
    if (refGroup != null) {
        Object refGroupType = refGroup.getGroupType();
        String refGroupDescriptor = getTypeDescriptor(refGroupType, javaClassCodec);
        if (required) {
            int instanceVar = nextVar.next();
            mv.visitVarInsn(ASTORE, instanceVar);
            mv.visitVarInsn(ALOAD, 0); // this
            mv.visitInsn(SWAP); // this and out
            mv.visitVarInsn(ALOAD, instanceVar);
            mv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "writeStaticGroup_" + refGroup.getName(),
                    "(Lcom/cinnober/msgcodec/io/ByteSink;" + refGroupDescriptor + ")V", false);
        } else {/*  w ww.  j a v a2  s  .  c o m*/
            int instanceVar = nextVar.next();
            mv.visitInsn(DUP);
            Label nonNullLabel = new Label();
            Label endLabel = new Label();
            mv.visitJumpInsn(IFNONNULL, nonNullLabel);
            // null
            mv.visitInsn(POP);
            mv.visitInsn(ICONST_0); // false
            mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writePresenceByte",
                    "(Lcom/cinnober/msgcodec/io/ByteSink;Z)V", false);
            mv.visitJumpInsn(GOTO, endLabel);

            // not null
            mv.visitLabel(nonNullLabel);
            // PENDING: mv.visitFrame?
            mv.visitVarInsn(ASTORE, instanceVar);
            mv.visitInsn(ICONST_1); // true
            mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writePresenceByte",
                    "(Lcom/cinnober/msgcodec/io/ByteSink;Z)V", false);
            mv.visitVarInsn(ALOAD, 0); // this
            mv.visitVarInsn(ALOAD, outputStreamVar);
            mv.visitVarInsn(ALOAD, instanceVar);
            mv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "writeStaticGroup_" + refGroup.getName(),
                    "(Lcom/cinnober/msgcodec/io/ByteSink;" + refGroupDescriptor + ")V", false);
            mv.visitLabel(endLabel);
            // PENDING: mv.visitFrame?
        }
    } else {
        throw new IllegalArgumentException("Illegal reference: " + type);
    }
}