Examples of com.sleepycat.asm.MethodVisitor

com.sleepycat.asm.MethodVisitor
A visitor to visit a Java method. The methods of this interface must be called in the following order: [ visitAnnotationDefault ] ( visitAnnotation | visitParameterAnnotation | visitAttribute )* [ visitCode ( visitXInsn | visitLabel | visitTryCatchBlock | visitLocalVariable | visitLineNumber)* visitMaxs ] visitEnd. In addition, the visitXInsn and visitLabel methods must be called in the sequential order of the bytecode instructions of the visited code, and the visitLocalVariable and visitLineNumber methods must be called after the labels passed as arguments have been visited. @author Eric Bruneton

     *      // or if no primary key but has superclass:
     *      return super.bdbIsPriKeyFieldNullOrZero();
     *  }
     */
    private void genBdbIsPriKeyFieldNullOrZero() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbIsPriKeyFieldNullOrZero", "()Z", null, null);
        mv.visitCode();
        if (priKeyField != null) {
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn
                (GETFIELD, className, priKeyField.name,
                 priKeyField.type.getDescriptor());
            Label l0 = new Label();
            if (isRefType(priKeyField.type)) {
                mv.visitJumpInsn(IFNONNULL, l0);
            } else {
                genBeforeCompareToZero(mv, priKeyField.type);
                mv.visitJumpInsn(IFNE, l0);
            }
            mv.visitInsn(ICONST_1);
            Label l1 = new Label();
            mv.visitJumpInsn(GOTO, l1);
            mv.visitLabel(l0);
            mv.visitInsn(ICONST_0);
            mv.visitLabel(l1);
        } else if (hasPersistentSuperclass) {
            mv.visitVarInsn(ALOAD, 0);
            mv.visitMethodInsn
                (INVOKESPECIAL, superclassName, "bdbIsPriKeyFieldNullOrZero",
                 "()Z");
        } else {
            mv.visitInsn(ICONST_0);
        }
        mv.visitInsn(IRETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }

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     *      // or if no primary key but has superclass:
     *      return super.bdbWritePriKeyField(output, format);
     *  }
     */
    private void genBdbWritePriKeyField() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbWritePriKeyField",
             "(Lcom/sleepycat/persist/impl/EntityOutput;" +
              "Lcom/sleepycat/persist/impl/Format;)V",
             null, null);
        mv.visitCode();
        if (priKeyField != null) {
            if (!genWriteSimpleKeyField(mv, priKeyField)) {
                /* For a non-simple type, call EntityOutput.writeKeyObject. */
                mv.visitVarInsn(ALOAD, 1);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitFieldInsn
                    (GETFIELD, className, priKeyField.name,
                     priKeyField.type.getDescriptor());
                mv.visitVarInsn(ALOAD, 2);
                mv.visitMethodInsn
                    (INVOKEINTERFACE,
                     "com/sleepycat/persist/impl/EntityOutput",
                     "writeKeyObject",
                     "(Ljava/lang/Object;" +
                      "Lcom/sleepycat/persist/impl/Format;)V");
            }
        } else if (hasPersistentSuperclass) {
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 1);
            mv.visitVarInsn(ALOAD, 2);
            mv.visitMethodInsn
                (INVOKESPECIAL, superclassName, "bdbWritePriKeyField",
                 "(Lcom/sleepycat/persist/impl/EntityOutput;" +
                  "Lcom/sleepycat/persist/impl/Format;)V");
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(3, 3);
        mv.visitEnd();
    }

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     *      // or if no primary key but has superclass:
     *      super.bdbReadPriKeyField(input, format);
     *  }
     */
    private void genBdbReadPriKeyField() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbReadPriKeyField",
             "(Lcom/sleepycat/persist/impl/EntityInput;" +
              "Lcom/sleepycat/persist/impl/Format;)V",
             null, null);
        mv.visitCode();
        if (priKeyField != null) {
            if (!genReadSimpleKeyField(mv, priKeyField)) {
                /* For a non-simple type, call EntityInput.readKeyObject. */
                mv.visitVarInsn(ALOAD, 0);
                mv.visitVarInsn(ALOAD, 1);
                mv.visitVarInsn(ALOAD, 2);
                mv.visitMethodInsn
                    (INVOKEINTERFACE, "com/sleepycat/persist/impl/EntityInput",
                     "readKeyObject",
                     "(Lcom/sleepycat/persist/impl/Format;)" +
                     "Ljava/lang/Object;");
                mv.visitTypeInsn(CHECKCAST, getTypeInstName(priKeyField.type));
                mv.visitFieldInsn
                    (PUTFIELD, className, priKeyField.name,
                     priKeyField.type.getDescriptor());
            }
        } else if (hasPersistentSuperclass) {
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 1);
            mv.visitVarInsn(ALOAD, 2);
            mv.visitMethodInsn
                (INVOKESPECIAL, superclassName, "bdbReadPriKeyField",
                 "(Lcom/sleepycat/persist/impl/EntityInput;" +
                  "Lcom/sleepycat/persist/impl/Format;)V");
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(3, 3);
        mv.visitEnd();
    }

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     *      output.writeObject(secKeyField2, null);
     *      // etc
     *  }
     */
    private void genBdbWriteSecKeyFields() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbWriteSecKeyFields",
             "(Lcom/sleepycat/persist/impl/EntityOutput;)V", null, null);
        mv.visitCode();
        if (priKeyField != null && isRefType(priKeyField.type)) {
            genRegisterPrimaryKey(mv, false);
        }
        if (hasPersistentSuperclass) {
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 1);
            mv.visitMethodInsn
                (INVOKESPECIAL, superclassName, "bdbWriteSecKeyFields",
                 "(Lcom/sleepycat/persist/impl/EntityOutput;)V");
        }
        for (FieldInfo field : secKeyFields) {
            genWriteField(mv, field);
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(2, 2);
        mv.visitEnd();
    }

View Full Code Here

     *          }
     *      }
     *  }
     */
    private void genBdbReadSecKeyFields() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbReadSecKeyFields",
             "(Lcom/sleepycat/persist/impl/EntityInput;III)V", null, null);
        mv.visitCode();
        if (priKeyField != null && isRefType(priKeyField.type)) {
            genRegisterPrimaryKey(mv, true);
        }
        genReadSuperKeyFields(mv, true);
        genReadFieldSwitch(mv, secKeyFields);
        mv.visitInsn(RETURN);
        mv.visitMaxs(5, 5);
        mv.visitEnd();
    }

View Full Code Here

     *  public void bdbWriteNonKeyFields(EntityOutput output) {
     *      // like bdbWriteSecKeyFields but does not call registerPriKeyObject
     *  }
     */
    private void genBdbWriteNonKeyFields() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbWriteNonKeyFields",
             "(Lcom/sleepycat/persist/impl/EntityOutput;)V", null, null);
        mv.visitCode();
        if (!isCompositeKey) {
            if (hasPersistentSuperclass) {
                mv.visitVarInsn(ALOAD, 0);
                mv.visitVarInsn(ALOAD, 1);
                mv.visitMethodInsn
                    (INVOKESPECIAL, superclassName, "bdbWriteNonKeyFields",
                     "(Lcom/sleepycat/persist/impl/EntityOutput;)V");
            }
            for (FieldInfo field : nonKeyFields) {
                genWriteField(mv, field);
            }
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(2, 2);
        mv.visitEnd();
    }

View Full Code Here

     *                                  int superLevel) {
     *      // like bdbReadSecKeyFields but does not call registerPriKeyObject
     *  }
     */
    private void genBdbReadNonKeyFields() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbReadNonKeyFields",
             "(Lcom/sleepycat/persist/impl/EntityInput;III)V", null, null);
        mv.visitCode();
        if (!isCompositeKey) {
            genReadSuperKeyFields(mv, false);
            genReadFieldSwitch(mv, nonKeyFields);
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(5, 5);
        mv.visitEnd();
    }

View Full Code Here

     *      output.writeKeyObject(compositeKeyField2, formats[1]);
     *      // etc
     *  }
     */
    private void genBdbWriteCompositeKeyFields() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbWriteCompositeKeyFields",
             "(Lcom/sleepycat/persist/impl/EntityOutput;" +
             "[Lcom/sleepycat/persist/impl/Format;)V",
             null, null);
        mv.visitCode();
        if (isCompositeKey) {
            for (int i = 0; i < nonKeyFields.size(); i += 1) {
                FieldInfo field = nonKeyFields.get(i);
                if (!genWriteSimpleKeyField(mv, field)) {
                    /* For a non-simple type, call writeKeyObject. */
                    mv.visitVarInsn(ALOAD, 1);
                    mv.visitVarInsn(ALOAD, 0);
                    mv.visitFieldInsn
                        (GETFIELD, className, field.name,
                         field.type.getDescriptor());
                    mv.visitVarInsn(ALOAD, 2);
                    if (i <= Byte.MAX_VALUE) {
                        mv.visitIntInsn(BIPUSH, i);
                    } else {
                        mv.visitLdcInsn(new Integer(i));
                    }
                    mv.visitInsn(AALOAD);
                    mv.visitMethodInsn
                        (INVOKEINTERFACE,
                         "com/sleepycat/persist/impl/EntityOutput",
                         "writeKeyObject",
                         "(Ljava/lang/Object;" +
                          "Lcom/sleepycat/persist/impl/Format;)V");
                }
            }
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(3, 3);
        mv.visitEnd();
    }

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     *      compositeKeyField1 = input.readInt();
     *      compositeKeyField2 = input.readKeyObject(formats[1]);
     *  }
     */
    private void genBdbReadCompositeKeyFields() {
        MethodVisitor mv = cv.visitMethod
            (ACC_PUBLIC, "bdbReadCompositeKeyFields",
             "(Lcom/sleepycat/persist/impl/EntityInput;" +
             "[Lcom/sleepycat/persist/impl/Format;)V",
             null, null);
        mv.visitCode();
        if (isCompositeKey) {
            for (int i = 0; i < nonKeyFields.size(); i += 1) {
                FieldInfo field = nonKeyFields.get(i);
                /* Ignore non-simple (illegal) types for composite key. */
                if (!genReadSimpleKeyField(mv, field)) {
                    /* For a non-simple type, call readKeyObject. */
                    mv.visitVarInsn(ALOAD, 0);
                    mv.visitVarInsn(ALOAD, 1);
                    mv.visitVarInsn(ALOAD, 2);
                    if (i <= Byte.MAX_VALUE) {
                        mv.visitIntInsn(BIPUSH, i);
                    } else {
                        mv.visitLdcInsn(new Integer(i));
                    }
                    mv.visitInsn(AALOAD);
                    mv.visitMethodInsn
                        (INVOKEINTERFACE,
                         "com/sleepycat/persist/impl/EntityInput",
                         "readKeyObject",
                         "(Lcom/sleepycat/persist/impl/Format;)" +
                         "Ljava/lang/Object;");
                    mv.visitTypeInsn(CHECKCAST, getTypeInstName(field.type));
                    mv.visitFieldInsn
                        (PUTFIELD, className, field.name,
                         field.type.getDescriptor());
                }
            }
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(5, 5);
        mv.visitEnd();
    }

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     *      // or for an abstract class:
     *      EnhancedAccessor.registerClass(TheClassName, null);
     *  }
     */
    private void genStaticBlock() {
        MethodVisitor mv =
            cv.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
        mv.visitCode();
        if (staticBlockMethod != null) {
            mv.visitMethodInsn
                (INVOKESTATIC, className, staticBlockMethod, "()V");
        }
        mv.visitLdcInsn(className.replace('/', '.'));
        if (isAbstract) {
            mv.visitInsn(ACONST_NULL);
        } else {
            mv.visitTypeInsn(NEW, className);
            mv.visitInsn(DUP);
            mv.visitMethodInsn(INVOKESPECIAL, className, "<init>", "()V");
        }
        mv.visitMethodInsn
            (INVOKESTATIC, "com/sleepycat/persist/impl/EnhancedAccessor",
             "registerClass",
             "(Ljava/lang/String;Lcom/sleepycat/persist/impl/Enhanced;)V");
        mv.visitInsn(RETURN);
        mv.visitMaxs(3, 0);
        mv.visitEnd();
    }

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com.sleepycat.persist.model.BytecodeEnhancer

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