Examples of org.mvel2.asm.Label

org.mvel2.asm.Label
A label represents a position in the bytecode of a method. Labels are used for jump, goto, and switch instructions, and for try catch blocks. A label designates the instruction that is just after. Note however that there can be other elements between a label and the instruction it designates (such as other labels, stack map frames, line numbers, etc.). @author Eric Bruneton

        mv.visitVarInsn( ASTORE, 1 );
        mv.visitVarInsn( ALOAD, 1 );


        if ( BuildUtils.isPrimitive( fieldType ) ) {


            Label l0 = new Label();
            mv.visitJumpInsn( IFNULL, l0 );
            mv.visitVarInsn( ALOAD, 1 );
            Label l1 = new Label();
            mv.visitJumpInsn( GOTO, l1 );
            mv.visitLabel( l0 );
            mv.visitInsn( BuildUtils.zero( fieldType ) );
            mv.visitMethodInsn( Opcodes.INVOKESTATIC,
                                BuildUtils.getInternalType( BuildUtils.box( fieldType ) ),

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        mv.visitVarInsn( ASTORE, 1 );
        mv.visitVarInsn( ALOAD, 1 );


        if ( BuildUtils.isPrimitive( fieldType ) ) {
            Label l0 = new Label();
            mv.visitJumpInsn( IFNULL, l0 );
            mv.visitVarInsn( ALOAD, 1 );
            Label l1 = new Label();
            mv.visitJumpInsn( GOTO, l1 );
            mv.visitLabel( l0 );
            mv.visitInsn( BuildUtils.zero( fieldType ) );
            mv.visitMethodInsn( Opcodes.INVOKESTATIC,
                                BuildUtils.getInternalType( BuildUtils.box( fieldType ) ),

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        mv = cw.visitMethod( ACC_PUBLIC, "equals", "(" + Type.getDescriptor( Object.class ) + ")Z", null, null );
        mv.visitCode();


        mv.visitVarInsn( ALOAD, 0 );
        mv.visitVarInsn( ALOAD, 1 );
        Label l0 = new Label();
        mv.visitJumpInsn( IF_ACMPNE, l0 );
        mv.visitInsn( ICONST_1 );
        mv.visitInsn( IRETURN );


        mv.visitLabel( l0 );
        mv.visitVarInsn( ALOAD, 1 );
        Label l1 = new Label();
        mv.visitJumpInsn( IFNULL, l1 );
        mv.visitVarInsn( ALOAD, 0 );
        mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( Object.class ), "getClass", "()" + Type.getDescriptor( Class.class ) );
        mv.visitVarInsn( ALOAD, 1 );
        mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( Object.class ), "getClass", "()" + Type.getDescriptor( Class.class ) );
        Label l2 = new Label();
        mv.visitJumpInsn( IF_ACMPEQ, l2 );
        mv.visitLabel( l1 );
        mv.visitInsn( ICONST_0 );
        mv.visitInsn( IRETURN );
        mv.visitLabel( l2 );




        mv.visitVarInsn( ALOAD, 1 );
        mv.visitTypeInsn( CHECKCAST, proxyType );
        mv.visitVarInsn( ASTORE, 2 );


        int x = 2;


        for ( FieldDefinition field : classDef.getFieldsDefinitions() ) {
            if ( field.isKey() ) {




                if ( ! BuildUtils.isPrimitive( field.getTypeName() ) ) {


                    mv.visitVarInsn( ALOAD, 0 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    Label l11 = new Label();
                    mv.visitJumpInsn( IFNULL, l11 );
                    mv.visitVarInsn( ALOAD, 0 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    mv.visitVarInsn( ALOAD, 2 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    mv.visitMethodInsn( INVOKEVIRTUAL, BuildUtils.getInternalType( field.getTypeName() ), "equals", "(" + Type.getDescriptor( Object.class ) + ")Z" );
                    Label l12 = new Label();
                    mv.visitJumpInsn( IFNE, l12 );
                    Label l13 = new Label();
                    mv.visitJumpInsn( GOTO, l13 );
                    mv.visitLabel( l11 );
                    mv.visitVarInsn( ALOAD, 2 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    mv.visitJumpInsn( IFNULL, l12 );
                    mv.visitLabel( l13 );
                    mv.visitInsn( ICONST_0 );
                    mv.visitInsn( IRETURN );
                    mv.visitLabel( l12 );


                } else if ( "double".equals( field.getTypeName() ) ) {


                    mv.visitVarInsn( ALOAD, 2 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    mv.visitVarInsn( ALOAD, 0 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    mv.visitMethodInsn( INVOKESTATIC, Type.getInternalName( Double.class ), "compare", "(DD)I" );
                    Label l5 = new Label();
                    mv.visitJumpInsn( IFEQ, l5 );
                    mv.visitInsn( ICONST_0 );
                    mv.visitInsn( IRETURN );
                    mv.visitLabel( l5 );


                    x = Math.max( x, 4 );


                } else if ( "float".equals( field.getTypeName() ) ) {


                    mv.visitVarInsn( ALOAD, 2 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    mv.visitVarInsn( ALOAD, 0 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    mv.visitMethodInsn( INVOKESTATIC, Type.getInternalName( Float.class ), "compare", "(FF)I" );
                    Label l6 = new Label();
                    mv.visitJumpInsn( IFEQ, l6 );
                    mv.visitInsn( ICONST_0 );
                    mv.visitInsn( IRETURN );
                    mv.visitLabel( l6 );




                }  else if ( "long".equals( field.getTypeName() ) ) {


                    mv.visitVarInsn( ALOAD, 0 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    mv.visitVarInsn( ALOAD, 2 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    mv.visitInsn( LCMP );
                    Label l8 = new Label();
                    mv.visitJumpInsn( IFEQ, l8 );
                    mv.visitInsn( ICONST_0 );
                    mv.visitInsn( IRETURN );
                    mv.visitLabel( l8 );


                    x = Math.max( x, 4 );


                } else {


                    mv.visitVarInsn( ALOAD, 0 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    mv.visitVarInsn( ALOAD, 2 );
                    mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                        "()" + Type.getDescriptor( field.getType() ) );
                    Label l4 = new Label();
                    mv.visitJumpInsn( IF_ICMPEQ, l4 );
                    mv.visitInsn( ICONST_0 );
                    mv.visitInsn( IRETURN );
                    mv.visitLabel( l4 );

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                        mv.visitVarInsn( ILOAD, 1 );
                        mv.visitInsn( IMUL );
                        mv.visitVarInsn( ALOAD, 0 );
                        mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                            "()" + Type.getDescriptor( field.getType() ) );
                        Label l8 = new Label();
                        mv.visitJumpInsn( IFNULL, l8 );
                        mv.visitVarInsn( ALOAD, 0 );
                        mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                            "()" + Type.getDescriptor( field.getType() ) );
                        mv.visitMethodInsn( INVOKEVIRTUAL, BuildUtils.getInternalType( field.getTypeName() ), "hashCode", "()I" );
                        Label l9 = new Label();
                        mv.visitJumpInsn( GOTO, l9 );
                        mv.visitLabel( l8 );
                        mv.visitInsn( ICONST_0 );
                        mv.visitLabel( l9 );
                        mv.visitInsn( IADD );
                        mv.visitVarInsn( ISTORE, 1 );


                    } else if ( "double".equals( field.getTypeName() ) ) {




                        mv.visitVarInsn( ALOAD, 0 );
                        mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                            "()" + Type.getDescriptor( field.getType() ) );
                        mv.visitInsn( DCONST_0 ); 
                        mv.visitInsn( DCMPL );
                        Label l2 = new Label();
                        mv.visitJumpInsn( IFEQ, l2 );
                        mv.visitVarInsn( ALOAD, 0 );
                        mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                            "()" + Type.getDescriptor( field.getType() ) );
                        mv.visitMethodInsn( INVOKESTATIC, Type.getInternalName( Double.class ), "doubleToLongBits", "(D)J" );
                        Label l3 = new Label();
                        mv.visitJumpInsn( GOTO, l3 );
                        mv.visitLabel( l2 );
                        mv.visitInsn( LCONST_0 );
                        mv.visitLabel( l3 );
                        mv.visitVarInsn( LSTORE, 2 );
                        mv.visitIntInsn( BIPUSH, 31 );
                        mv.visitVarInsn( ILOAD, 1 );
                        mv.visitInsn( IMUL );
                        mv.visitVarInsn( LLOAD, 2 );
                        mv.visitVarInsn( LLOAD, 2 );
                        mv.visitIntInsn( BIPUSH, 32 );
                        mv.visitInsn( LUSHR );
                        mv.visitInsn( LXOR );
                        mv.visitInsn( L2I );
                        mv.visitInsn( IADD );
                        mv.visitVarInsn( ISTORE, 1 );


                        x = Math.max( 6, x );
                        y = Math.max( 4, y );


                    } else if ( "boolean".equals( field.getTypeName() ) ) {


                        mv.visitIntInsn( BIPUSH, 31 );
                        mv.visitVarInsn( ILOAD, 1 );
                        mv.visitInsn( IMUL );
                        mv.visitVarInsn( ALOAD, 0 );
                        mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                            "()" + Type.getDescriptor( field.getType() ) );
                        Label l4 = new Label();
                        mv.visitJumpInsn( IFEQ, l4 );
                        mv.visitInsn( ICONST_1 );
                        Label l5 = new Label();
                        mv.visitJumpInsn( GOTO, l5 );
                        mv.visitLabel( l4 );
                        mv.visitInsn( ICONST_0 );
                        mv.visitLabel( l5 );
                        mv.visitInsn( IADD );
                        mv.visitVarInsn( ISTORE, 1 );


                    } else if ( "float".equals( field.getTypeName() ) ) {


                        mv.visitIntInsn( BIPUSH, 31 );
                        mv.visitVarInsn( ILOAD, 1 );
                        mv.visitInsn( IMUL );
                        mv.visitVarInsn( ALOAD, 0 );
                        mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                            "()" + Type.getDescriptor( field.getType() ) );
                        mv.visitInsn( FCONST_0 );
                        mv.visitInsn( FCMPL );
                        Label l6 = new Label();
                        mv.visitJumpInsn( IFEQ, l6 );
                        mv.visitVarInsn( ALOAD, 0 );
                        mv.visitMethodInsn( INVOKEVIRTUAL, proxyType, BuildUtils.getterName( field.getName(), field.getTypeName() ), 
                                            "()" + Type.getDescriptor( field.getType() ) );
                        mv.visitMethodInsn( INVOKESTATIC, Type.getInternalName( Float.class ), "floatToIntBits", "(F)I" );
                        Label l7 = new Label();
                        mv.visitJumpInsn( GOTO, l7 );
                        mv.visitLabel( l6 );
                        mv.visitInsn( ICONST_0 );
                        mv.visitLabel( l7 );
                        mv.visitInsn( IADD );

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        mv.visitVarInsn( ALOAD, 0 );
        mv.visitMethodInsn( INVOKEVIRTUAL,
                            BuildUtils.getInternalType( proxyName ),
                            BuildUtils.getterName( fld.getName(), fld.getTypeName() ),
                            "()" + BuildUtils.getTypeDescriptor( fld.getTypeName() ) );
        Label l0 = null;
        if ( ! BuildUtils.isPrimitive( fld.getTypeName() ) ) {
            l0 = new Label();
            mv.visitJumpInsn( IFNONNULL, l0 );
        }


        mv.visitVarInsn( ALOAD, 0 );
        mv.visitLdcInsn( fld.getInitExpr() );

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        mv.visitVarInsn( ASTORE, j );
        mv.visitVarInsn( ALOAD, 0 );
        mv.visitVarInsn( ALOAD, j );


        if ( BuildUtils.isPrimitive( fld.getTypeName() ) ) {
            Label l0 = new Label();
            mv.visitJumpInsn( IFNULL, l0 );
            mv.visitVarInsn( ALOAD, j );
            mv.visitTypeInsn( CHECKCAST, BuildUtils.getInternalType( BuildUtils.box( fld.getTypeName() ) ) );
            mv.visitMethodInsn( INVOKEVIRTUAL,
                                BuildUtils.getInternalType( BuildUtils.box( fld.getTypeName() ) ),
                                BuildUtils.numericMorph( BuildUtils.box( fld.getTypeName() ) ),
                                Type.getMethodDescriptor( Type.getType( fld.getType() ), new Type[] {} ) );
            Label l1 = new Label();
            mv.visitJumpInsn( GOTO, l1 );
            mv.visitLabel( l0 );
            mv.visitInsn( BuildUtils.zero( fld.getTypeName() ) );
            mv.visitLabel( l1 );
        } else {

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            mv.visitVarInsn( ALOAD, 0 );
            mv.visitFieldInsn( GETFIELD, BuildUtils.getInternalType( proxyName ), "object", Type.getDescriptor( core.getDefinedClass() ) );


            mv.visitVarInsn( ALOAD, j );
            if ( BuildUtils.isPrimitive( coreField.getTypeName() ) ) {
                Label l0 = new Label();
                mv.visitJumpInsn( IFNULL, l0 );
                mv.visitVarInsn( ALOAD, j );
                mv.visitTypeInsn( CHECKCAST, BuildUtils.getInternalType( BuildUtils.box( coreField.getTypeName() ) ) );
                mv.visitMethodInsn( INVOKEVIRTUAL,
                                    BuildUtils.getInternalType( BuildUtils.box( coreField.getTypeName() ) ),
                                    BuildUtils.numericMorph( BuildUtils.box( coreField.getTypeName() ) ),
                                    Type.getMethodDescriptor( Type.getType( coreField.getType() ), new Type[] {} ) );
                Label l1 = new Label();
                mv.visitJumpInsn( GOTO, l1 );
                mv.visitLabel( l0 );
                mv.visitInsn( BuildUtils.zero( coreField.getTypeName() ) );
                mv.visitLabel( l1 );
            } else {

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    private void invokeRemove( MethodVisitor mv, String wrapperName, ClassDefinition core, String fieldName, FieldDefinition field ) {
        mv.visitLdcInsn( fieldName );
        mv.visitVarInsn( ALOAD, 1 );
        mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName(String.class), "equals", "(" + Type.getDescriptor( Object.class ) + ")Z" );
        Label l1 = new Label();
        mv.visitJumpInsn( IFEQ, l1 );


        TraitFactory.invokeExtractor( mv, wrapperName, trait, core, field );


        if ( BuildUtils.isPrimitive( field.getTypeName() ) ) {

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            boolean isSoftField = TraitRegistry.isSoftField( field, j++, mask );
            if ( isSoftField ) {
                mv.visitLdcInsn( field.getName() );
                mv.visitVarInsn( ALOAD, 1 );
                mv.visitMethodInsn( INVOKEVIRTUAL, Type.getInternalName( String.class ), "equals", "(" + Type.getDescriptor( Object.class ) + ")Z" );
                Label l2 = new Label();
                mv.visitJumpInsn( IFEQ, l2 );
                mv.visitVarInsn( ALOAD, 0 );
                mv.visitFieldInsn( GETFIELD, internalWrapper, "map", Type.getDescriptor( Map.class ) );
                mv.visitLdcInsn( field.getName() );
                mv.visitMethodInsn( INVOKEINTERFACE, Type.getInternalName( Map.class ), "get", "(" + Type.getDescriptor( Object.class ) + ")" + Type.getDescriptor( Object.class ) );

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                mv.visitVarInsn( ALOAD, varNum );
                mv.visitLdcInsn( field.resolveAlias() );
                mv.visitMethodInsn( INVOKEINTERFACE,
                        Type.getInternalName( Map.class ), "containsKey",
                        Type.getMethodDescriptor( Type.getType( boolean.class ), new Type[] { Type.getType( Object.class ) } ) );
                Label l0 = new Label();
                mv.visitJumpInsn( IFNE, l0 );


                mv.visitVarInsn( ALOAD, varNum );
                mv.visitLdcInsn( field.resolveAlias() );
                mv.visitInsn( BuildUtils.zero( field.getTypeName() ) );
                if ( BuildUtils.isPrimitive( field.getTypeName() ) ) {
                    TraitFactory.valueOf( mv, field.getTypeName() );
                }
                mv.visitMethodInsn( INVOKEINTERFACE, Type.getInternalName( Map.class ), "put", 
                                    "(" + Type.getDescriptor( Object.class ) + Type.getDescriptor( Object.class ) + ")" + Type.getDescriptor( Object.class ) );
                mv.visitInsn( POP );


                if ( core.isFullTraiting() ) {
                    mv.visitVarInsn( ALOAD, 0 );
                    mv.visitFieldInsn( GETFIELD, internalWrapper, "object", Type.getDescriptor( core.getDefinedClass() ) );
                    mv.visitTypeInsn( CHECKCAST, Type.getInternalName( TraitableBean.class ) );
                    mv.visitMethodInsn( INVOKEINTERFACE, Type.getInternalName( TraitableBean.class ), "_getFieldTMS", Type.getMethodDescriptor( Type.getType( TraitFieldTMS.class ), new Type[] {} ) );
                    mv.visitVarInsn( ASTORE, 1 );
                    mv.visitVarInsn( ALOAD, 1 );
                    mv.visitLdcInsn( field.resolveAlias() );
                    mv.visitMethodInsn( INVOKEINTERFACE, Type.getInternalName( TraitFieldTMS.class ), "isManagingField", Type.getMethodDescriptor( Type.BOOLEAN_TYPE, new Type[] { Type.getType( String.class ) } ) );
                    Label l1 = new Label();
                    mv.visitJumpInsn( IFNE, l1 );
                    mv.visitVarInsn( ALOAD, 1 );
                    mv.visitLdcInsn( Type.getType( BuildUtils.getTypeDescriptor( core.getClassName() ) ) );
                    mv.visitLdcInsn( field.resolveAlias() );
                    mv.visitMethodInsn( INVOKEINTERFACE, Type.getInternalName( TraitFieldTMS.class ), "registerField", Type.getMethodDescriptor( Type.VOID_TYPE, new Type[]{ Type.getType( Class.class ), Type.getType( String.class ) } ) );

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