Example usage for org.objectweb.asm Label Label

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.google.gwtorm.jdbc.AccessGen.java

License:Apache License

private void overrideGetMany() {
    final KeyModel pk = model.getPrimaryKey();
    final StringBuilder query = new StringBuilder();
    query.append(model.getSelectSql(dialect, REL_ALIAS));
    query.append(" WHERE ");
    final ColumnModel pkcol = pk.getAllLeafColumns().iterator().next();
    query.append(REL_ALIAS);/*from  w  w w. j a va 2s.com*/
    query.append('.');
    query.append(pkcol.getColumnName());
    query.append(" IN");

    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_FINAL, "getBySqlIn",
            Type.getMethodDescriptor(Type.getType(com.google.gwtorm.server.ResultSet.class),
                    new Type[] { Type.getType(Collection.class) }),
            null, new String[] { Type.getType(OrmException.class).getInternalName() });
    mv.visitCode();

    final int keyset = 1;
    final int psvar = 2;
    final int itrvar = 3;
    final int colvar = 4;
    final int keyvar = 5;

    mv.visitVarInsn(ALOAD, 0);
    mv.visitLdcInsn(query.toString());
    mv.visitVarInsn(ALOAD, keyset);
    mv.visitMethodInsn(INVOKEVIRTUAL, superTypeName, "prepareBySqlIn",
            Type.getMethodDescriptor(Type.getType(PreparedStatement.class),
                    new Type[] { Type.getType(String.class), Type.getType(Collection.class) }));
    mv.visitVarInsn(ASTORE, psvar);

    mv.visitVarInsn(ALOAD, keyset);
    mv.visitMethodInsn(INVOKEINTERFACE, Type.getInternalName(Collection.class), "iterator",
            Type.getMethodDescriptor(Type.getType(Iterator.class), new Type[] {}));
    mv.visitVarInsn(ASTORE, itrvar);

    mv.visitInsn(ICONST_1);
    mv.visitVarInsn(ISTORE, colvar);

    final Label endbind = new Label();
    final Label again = new Label();
    mv.visitLabel(again);
    mv.visitVarInsn(ALOAD, itrvar);
    mv.visitMethodInsn(INVOKEINTERFACE, Type.getInternalName(Iterator.class), "hasNext",
            Type.getMethodDescriptor(Type.BOOLEAN_TYPE, new Type[] {}));
    mv.visitJumpInsn(IFEQ, endbind);

    mv.visitVarInsn(ALOAD, itrvar);
    mv.visitMethodInsn(INVOKEINTERFACE, Type.getInternalName(Iterator.class), "next",
            Type.getMethodDescriptor(Type.getType(Object.class), new Type[] {}));
    mv.visitTypeInsn(CHECKCAST, CodeGenSupport.toType(pk.getField()).getInternalName());
    mv.visitVarInsn(ASTORE, keyvar);

    final CodeGenSupport cgs = new CodeGenSupport(mv) {
        @Override
        public void pushSqlHandle() {
            mv.visitVarInsn(ALOAD, psvar);
        }

        @Override
        public void pushFieldValue() {
            appendGetField(getFieldReference());
        }

        @Override
        public void pushColumnIndex() {
            mv.visitVarInsn(ILOAD, colvar);
        }

        @Override
        protected void appendGetField(final ColumnModel c) {
            if (c.getParent() == null) {
                mv.visitVarInsn(ALOAD, keyvar);
            } else {
                super.appendGetField(c);
            }
        }
    };

    cgs.setFieldReference(pkcol);
    dialect.getSqlTypeInfo(pkcol).generatePreparedStatementSet(cgs);
    mv.visitIincInsn(colvar, 1);
    mv.visitJumpInsn(GOTO, again);

    mv.visitLabel(endbind);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, psvar);
    mv.visitMethodInsn(INVOKEVIRTUAL, superTypeName, "queryList",
            Type.getMethodDescriptor(Type.getType(com.google.gwtorm.server.ResultSet.class),
                    new Type[] { Type.getType(PreparedStatement.class) }));
    mv.visitInsn(ARETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

---

From source file:com.google.gwtorm.protobuf.CodecGen.java

License:Apache License

private static void sizeofMessage(final JavaColumnModel[] myFields, final MethodVisitor mv, final SizeofCGS cgs)
        throws OrmException {
    for (final JavaColumnModel f : myFields) {
        if (f.isNested()) {
            final Label end = new Label();
            cgs.setFieldReference(f);//from   ww w . j  ava 2  s .c  om
            cgs.pushFieldValue();
            mv.visitJumpInsn(IFNULL, end);

            final int oldVar = cgs.sizeVar;
            final int msgVar = cgs.newLocal();
            cgs.sizeVar = msgVar;
            cgs.push(0);
            mv.visitVarInsn(ISTORE, cgs.sizeVar);

            sizeofMessage(sort(f.getNestedColumns()), mv, cgs);
            cgs.sizeVar = oldVar;

            cgs.push(f.getColumnID());
            cgs.inc("computeTagSize", Type.INT_TYPE);

            mv.visitVarInsn(ILOAD, msgVar);
            cgs.inc("computeRawVarint32Size", Type.INT_TYPE);

            mv.visitVarInsn(ILOAD, msgVar);
            cgs.inc();

            cgs.freeLocal(msgVar);
            mv.visitLabel(end);
        } else {
            sizeofScalar(mv, cgs, f);
        }
    }
}

---

From source file:com.google.gwtorm.protobuf.CodecGen.java

License:Apache License

private static void sizeofScalar(final MethodVisitor mv, final SizeofCGS cgs, final JavaColumnModel f)
        throws OrmException {
    cgs.setFieldReference(f);/*w  w  w  . jav a2 s. c  o  m*/

    switch (Type.getType(f.getPrimitiveType()).getSort()) {
    case Type.BOOLEAN:
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.inc("computeBoolSize", Type.INT_TYPE, Type.BOOLEAN_TYPE);
        break;

    case Type.CHAR:
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.inc("computeUInt32Size", Type.INT_TYPE, Type.INT_TYPE);
        break;

    case Type.BYTE:
    case Type.SHORT:
    case Type.INT:
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.inc("computeSInt32Size", Type.INT_TYPE, Type.INT_TYPE);
        break;

    case Type.FLOAT:
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.inc("computeFloatSize", Type.INT_TYPE, Type.FLOAT_TYPE);
        break;

    case Type.DOUBLE:
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.inc("computeDoubleSize", Type.INT_TYPE, Type.DOUBLE_TYPE);
        break;

    case Type.LONG:
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.inc("computeSInt64", Type.INT_TYPE, Type.LONG_TYPE);
        break;

    case Type.ARRAY:
    case Type.OBJECT: {
        final Label end = new Label();
        cgs.pushFieldValue();
        mv.visitJumpInsn(IFNULL, end);

        if (f.getPrimitiveType() == byte[].class) {
            cgs.push(f.getColumnID());
            cgs.inc("computeTagSize", Type.INT_TYPE);

            cgs.pushFieldValue();
            mv.visitInsn(ARRAYLENGTH);
            cgs.inc("computeRawVarint32Size", Type.INT_TYPE);

            cgs.pushFieldValue();
            mv.visitInsn(ARRAYLENGTH);
            cgs.inc();

        } else if (f.getPrimitiveType() == String.class) {
            cgs.push(f.getColumnID());
            cgs.pushFieldValue();
            cgs.inc("computeStringSize", Type.INT_TYPE, string);

        } else if (f.getPrimitiveType() == java.sql.Timestamp.class
                || f.getPrimitiveType() == java.util.Date.class
                || f.getPrimitiveType() == java.sql.Date.class) {
            cgs.push(f.getColumnID());
            String tsType = Type.getType(f.getPrimitiveType()).getInternalName();
            mv.visitMethodInsn(INVOKEVIRTUAL, tsType, "getTime",
                    Type.getMethodDescriptor(Type.LONG_TYPE, new Type[] {}));
            cgs.inc("computeFixed64Size", Type.INT_TYPE, Type.LONG_TYPE);

        } else {
            throw new OrmException(
                    "Type " + f.getPrimitiveType() + " not supported for field " + f.getPathToFieldName());
        }
        mv.visitLabel(end);
        break;
    }

    default:
        throw new OrmException(
                "Type " + f.getPrimitiveType() + " not supported for field " + f.getPathToFieldName());
    }
}

---

From source file:com.google.gwtorm.protobuf.CodecGen.java

License:Apache License

private static void encodeMessage(final JavaColumnModel[] myFields, final MethodVisitor mv, final EncodeCGS cgs)
        throws OrmException {
    final int oldVar = cgs.codedOutputStreamVar;
    cgs.codedOutputStreamVar = cgs.newLocal();

    final int strVar = cgs.newLocal();
    mv.visitMethodInsn(INVOKESTATIC, byteString.getInternalName(), "newOutput",
            Type.getMethodDescriptor(byteStringOutput, new Type[] {}));
    mv.visitVarInsn(ASTORE, strVar);/*www  .ja v  a2  s .  c o  m*/

    mv.visitVarInsn(ALOAD, strVar);
    mv.visitMethodInsn(INVOKESTATIC, codedOutputStream.getInternalName(), "newInstance",
            Type.getMethodDescriptor(codedOutputStream, new Type[] { Type.getType(OutputStream.class) }));
    mv.visitVarInsn(ASTORE, cgs.codedOutputStreamVar);

    for (final JavaColumnModel f : myFields) {
        if (f.isNested()) {
            final Label end = new Label();
            cgs.setFieldReference(f);
            cgs.pushFieldValue();
            mv.visitJumpInsn(IFNULL, end);

            final int v = cgs.newLocal();
            encodeMessage(sort(f.getNestedColumns()), mv, cgs);
            mv.visitVarInsn(ASTORE, v);

            mv.visitVarInsn(ALOAD, v);
            mv.visitMethodInsn(INVOKEVIRTUAL, byteString.getInternalName(), "size",
                    Type.getMethodDescriptor(Type.INT_TYPE, new Type[] {}));
            mv.visitJumpInsn(IFEQ, end);

            cgs.pushCodedOutputStream();
            cgs.push(f.getColumnID());
            mv.visitVarInsn(ALOAD, v);
            cgs.write("writeBytes", byteString);

            cgs.freeLocal(v);
            mv.visitLabel(end);
        } else {
            encodeScalar(mv, cgs, f);
        }
    }

    cgs.pushCodedOutputStream();
    mv.visitMethodInsn(INVOKEVIRTUAL, codedOutputStream.getInternalName(), "flush",
            Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}));

    cgs.freeLocal(cgs.codedOutputStreamVar);
    cgs.codedOutputStreamVar = oldVar;

    mv.visitVarInsn(ALOAD, strVar);
    mv.visitMethodInsn(INVOKEVIRTUAL, byteStringOutput.getInternalName(), "toByteString",
            Type.getMethodDescriptor(byteString, new Type[] {}));
    cgs.freeLocal(strVar);
}

---

From source file:com.google.gwtorm.protobuf.CodecGen.java

License:Apache License

private static void encodeScalar(final MethodVisitor mv, final EncodeCGS cgs, final JavaColumnModel f)
        throws OrmException {
    cgs.setFieldReference(f);//from   w  ww.j a va  2  s .c o  m

    switch (Type.getType(f.getPrimitiveType()).getSort()) {
    case Type.BOOLEAN:
        cgs.pushCodedOutputStream();
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.write("writeBool", Type.BOOLEAN_TYPE);
        break;

    case Type.CHAR:
        cgs.pushCodedOutputStream();
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.write("writeUInt32", Type.INT_TYPE);
        break;

    case Type.BYTE:
    case Type.SHORT:
    case Type.INT:
        cgs.pushCodedOutputStream();
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.write("writeSInt32", Type.INT_TYPE);
        break;

    case Type.FLOAT:
        cgs.pushCodedOutputStream();
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.write("writeFloat", Type.FLOAT_TYPE);
        break;

    case Type.DOUBLE:
        cgs.pushCodedOutputStream();
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.write("writeDouble", Type.DOUBLE_TYPE);
        break;

    case Type.LONG:
        cgs.pushCodedOutputStream();
        cgs.push(f.getColumnID());
        cgs.pushFieldValue();
        cgs.write("writeSInt64", Type.LONG_TYPE);
        break;

    case Type.ARRAY:
    case Type.OBJECT: {
        final Label end = new Label();
        cgs.pushFieldValue();
        mv.visitJumpInsn(IFNULL, end);

        if (f.getPrimitiveType() == byte[].class) {
            cgs.pushCodedOutputStream();
            cgs.push(f.getColumnID());
            cgs.push(WireFormat.FieldType.BYTES.getWireType());
            mv.visitMethodInsn(INVOKEVIRTUAL, codedOutputStream.getInternalName(), "writeTag",
                    Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.INT_TYPE, Type.INT_TYPE }));

            cgs.pushCodedOutputStream();
            cgs.pushFieldValue();
            mv.visitInsn(ARRAYLENGTH);
            mv.visitMethodInsn(INVOKEVIRTUAL, codedOutputStream.getInternalName(), "writeRawVarint32",
                    Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.INT_TYPE }));

            cgs.pushCodedOutputStream();
            cgs.pushFieldValue();
            mv.visitMethodInsn(INVOKEVIRTUAL, codedOutputStream.getInternalName(), "writeRawBytes",
                    Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(byte[].class) }));

        } else {
            cgs.pushCodedOutputStream();
            cgs.push(f.getColumnID());
            cgs.pushFieldValue();

            if (f.getPrimitiveType() == String.class) {
                cgs.write("writeString", string);

            } else if (f.getPrimitiveType() == java.sql.Timestamp.class
                    || f.getPrimitiveType() == java.util.Date.class
                    || f.getPrimitiveType() == java.sql.Date.class) {
                String tsType = Type.getType(f.getPrimitiveType()).getInternalName();
                mv.visitMethodInsn(INVOKEVIRTUAL, tsType, "getTime",
                        Type.getMethodDescriptor(Type.LONG_TYPE, new Type[] {}));
                cgs.write("writeFixed64", Type.LONG_TYPE);

            } else {
                throw new OrmException(
                        "Type " + f.getPrimitiveType() + " not supported for field " + f.getPathToFieldName());
            }
        }
        mv.visitLabel(end);
        break;
    }

    default:
        throw new OrmException(
                "Type " + f.getPrimitiveType() + " not supported for field " + f.getPathToFieldName());
    }
}

---

From source file:com.google.gwtorm.protobuf.CodecGen.java

License:Apache License

private static void decodeMessage(final JavaColumnModel[] myFields, final MethodVisitor mv, final DecodeCGS cgs)
        throws OrmException {
    final Label nextField = new Label();
    final Label end = new Label();
    mv.visitLabel(nextField);/*from w w w .j av  a 2 s  .  c  o  m*/

    // while (!ci.isAtEnd) { ...
    cgs.call("readTag", Type.INT_TYPE);
    mv.visitInsn(DUP);
    mv.visitVarInsn(ISTORE, cgs.tagVar);

    cgs.push(3);
    mv.visitInsn(IUSHR);

    final Label badField = new Label();
    final int[] caseTags = new int[1 + myFields.length];
    final Label[] caseLabels = new Label[caseTags.length];

    caseTags[0] = 0;
    caseLabels[0] = new Label();

    int gaps = 0;
    for (int i = 1; i < caseTags.length; i++) {
        caseTags[i] = myFields[i - 1].getColumnID();
        caseLabels[i] = new Label();
        gaps += caseTags[i] - (caseTags[i - 1] + 1);
    }

    if (2 * gaps / 3 <= myFields.length) {
        final int min = 0;
        final int max = caseTags[caseTags.length - 1];
        final Label[] table = new Label[max + 1];
        Arrays.fill(table, badField);
        for (int idx = 0; idx < caseTags.length; idx++) {
            table[caseTags[idx]] = caseLabels[idx];
        }
        mv.visitTableSwitchInsn(min, max, badField, table);
    } else {
        mv.visitLookupSwitchInsn(badField, caseTags, caseLabels);
    }

    mv.visitLabel(caseLabels[0]);
    mv.visitJumpInsn(GOTO, end);

    for (int idx = 1; idx < caseTags.length; idx++) {
        final JavaColumnModel f = myFields[idx - 1];
        mv.visitLabel(caseLabels[idx]);
        if (f.isNested()) {
            final Label load = new Label();
            cgs.setFieldReference(f);
            cgs.pushFieldValue();
            mv.visitJumpInsn(IFNONNULL, load);
            cgs.fieldSetBegin();
            mv.visitTypeInsn(NEW, Type.getType(f.getNestedClass()).getInternalName());
            mv.visitInsn(DUP);
            mv.visitMethodInsn(INVOKESPECIAL, Type.getType(f.getNestedClass()).getInternalName(), "<init>",
                    Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}));
            cgs.fieldSetEnd();

            // read the length, set a new limit, decode the message, validate
            // we stopped at the end of it as expected.
            //
            mv.visitLabel(load);
            final int limitVar = cgs.newLocal();
            cgs.pushCodedInputStream();
            cgs.call("readRawVarint32", Type.INT_TYPE);
            cgs.ncallInt("pushLimit", Type.INT_TYPE);
            mv.visitVarInsn(ISTORE, limitVar);

            decodeMessage(sort(f.getNestedColumns()), mv, cgs);

            cgs.pushCodedInputStream();
            mv.visitVarInsn(ILOAD, limitVar);
            cgs.ncallInt("popLimit", Type.VOID_TYPE);
            cgs.freeLocal(limitVar);

        } else {
            decodeScalar(mv, cgs, f);
        }
        mv.visitJumpInsn(GOTO, nextField);
    }

    // default:
    mv.visitLabel(badField);
    cgs.pushCodedInputStream();
    mv.visitVarInsn(ILOAD, cgs.tagVar);
    cgs.ncallInt("skipField", Type.BOOLEAN_TYPE);
    mv.visitInsn(POP);
    mv.visitJumpInsn(GOTO, nextField);

    mv.visitLabel(end);
    cgs.pushCodedInputStream();
    cgs.push(0);
    cgs.ncallInt("checkLastTagWas", Type.VOID_TYPE);
}

---

From source file:com.google.gwtorm.schema.sql.SqlBooleanTypeInfo.java

License:Apache License

@Override
public void generatePreparedStatementSet(final CodeGenSupport cgs) {
    cgs.pushSqlHandle();//  w  w  w  . j  a va2  s . c  o  m
    cgs.pushColumnIndex();
    cgs.pushFieldValue();

    final Label useNo = new Label();
    final Label end = new Label();
    cgs.mv.visitJumpInsn(Opcodes.IFEQ, useNo);
    cgs.mv.visitLdcInsn(getTrueValue());
    cgs.mv.visitJumpInsn(Opcodes.GOTO, end);
    cgs.mv.visitLabel(useNo);
    cgs.mv.visitLdcInsn(getFalseValue());
    cgs.mv.visitLabel(end);
    cgs.invokePreparedStatementSet(getJavaSqlTypeAlias());
}

---

From source file:com.google.java.contract.core.agent.LineNumberingMethodAdapter.java

License:Open Source License

@Override
protected void onMethodEnter() {
    if (lineNumbers != null && !lineNumbers.isEmpty()) {
        Long lineNumber = lineNumbers.get(0);
        if (lineNumber != null) {
            Label methodStart = new Label();
            mark(methodStart);/*from   ww w.j  av  a  2  s  .c  om*/
            mv.visitLineNumber(lineNumber.intValue(), methodStart);
        }
    }
}

---

From source file:com.google.java.contract.core.agent.SpecificationMethodAdapter.java

License:Open Source License

/**
 * Constructs a new SpecificationClassAdapter.
 *
 * @param ca the class adapter which has spawned this method adapter
 * @param mv the method visitor to delegate to
 * @param access the method access bit mask
 * @param methodName the name of the method
 * @param methodDesc the descriptor of the method
 *//*from   w  w w  . ja v  a 2 s.  c  o  m*/
@Requires({ "ca != null", "mv != null", "methodName != null", "methodDesc != null" })
public SpecificationMethodAdapter(SpecificationClassAdapter ca, MethodVisitor mv, int access, String methodName,
        String methodDesc) {
    super(Opcodes.ASM5, mv, access, methodName, methodDesc);

    methodStart = new Label();
    methodEnd = new Label();

    this.contracts = ca.getContracts();
    className = ca.getClassName();
    this.methodName = methodName;
    this.methodDesc = methodDesc;
    thisType = Type.getType("L" + className + ";");

    statik = (access & ACC_STATIC) != 0;
    isConstructor = methodName.equals("<init>");
    isStaticInit = methodName.endsWith("<clinit>");

    contextLocal = -1;
    checkInvariantsLocal = -1;
    oldValueLocals = new ArrayList<Integer>();
    signalOldValueLocals = new ArrayList<Integer>();

    classAdapter = ca;

    ActivationRuleManager am = ActivationRuleManager.getInstance();
    withPreconditions = am.hasPreconditionsEnabled(className);
    withPostconditions = am.hasPostconditionsEnabled(className);
    withInvariants = am.hasInvariantsEnabled(className);
}

---

From source file:com.google.java.contract.core.agent.SpecificationMethodAdapter.java

License:Open Source License

/**
 * Advises the method by injecting exceptional postconditions and
 * invariants after the original code. This code only gets executed
 * if an exception has been thrown (otherwise, a {@code return}
 * instruction would have ended execution of the method already).
 *///  ww w.ja  v  a2s.  co  m
@Override
public void visitMaxs(int maxStack, int maxLocals) {
    if (withPreconditions || withPostconditions || withInvariants) {
        mark(methodEnd);
        catchException(methodStart, methodEnd, null);

        if (withPostconditions) {
            Label skipEx = new Label();
            dup();
            instanceOf(EXCEPTION_TYPE);
            ifZCmp(EQ, skipEx);

            Label skip = enterBusySection();
            int throwIndex = newLocal(EXCEPTION_TYPE);
            checkCast(EXCEPTION_TYPE);
            storeLocal(throwIndex);

            invokeCommonPostconditions(ContractKind.SIGNAL, signalOldValueLocals, throwIndex);
            if (withInvariants && !statik) {
                invokeInvariants();
            }

            loadLocal(throwIndex);
            leaveBusySection(skip);

            mark(skipEx);
        }

        /*
         * The exception to throw is on the stack and
         * leaveContractedMethod() does not alter that fact.
         */
        leaveContractedMethod();
        throwException();
    }
    super.visitMaxs(maxStack, maxLocals);
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »