traceclassvisitor.java

jboss规则引擎

        // if enclosing name is null, so why should we show this info?
        if ( name != null ) {
            this.buf.append( ' ' ).append( name ).append( ' ' );
        } else {
            this.buf.append( ' ' );
        }
        appendDescriptor( TraceAbstractVisitor.METHOD_DESCRIPTOR,
                          desc );
        this.buf.append( '\n' );
        this.text.add( this.buf.toString() );

        if ( this.cv != null ) {
            this.cv.visitOuterClass( owner,
                                     name,
                                     desc );
        }
    }

    public AnnotationVisitor visitAnnotation(final String desc,
                                             final boolean visible) {
        this.text.add( "\n" );
        final AnnotationVisitor tav = super.visitAnnotation( desc,
                                                             visible );
        if ( this.cv != null ) {
            ((TraceAnnotationVisitor) tav).av = this.cv.visitAnnotation( desc,
                                                                         visible );
        }
        return tav;
    }

    public void visitAttribute(final Attribute attr) {
        this.text.add( "\n" );
        super.visitAttribute( attr );

        if ( this.cv != null ) {
            this.cv.visitAttribute( attr );
        }
    }

    public void visitInnerClass(final String name,
                                final String outerName,
                                final String innerName,
                                final int access) {
        this.buf.setLength( 0 );
        this.buf.append( this.tab ).append( "// access flags " ).append( access & ~Opcodes.ACC_SUPER ).append( '\n' );
        this.buf.append( this.tab );
        appendAccess( access );
        this.buf.append( "INNERCLASS " );
        if ( (access & Opcodes.ACC_ENUM) != 0 ) {
            this.buf.append( "enum " );
        }
        appendDescriptor( TraceAbstractVisitor.INTERNAL_NAME,
                          name );
        this.buf.append( ' ' );
        appendDescriptor( TraceAbstractVisitor.INTERNAL_NAME,
                          outerName );
        this.buf.append( ' ' );
        appendDescriptor( TraceAbstractVisitor.INTERNAL_NAME,
                          innerName );
        this.buf.append( '\n' );
        this.text.add( this.buf.toString() );

        if ( this.cv != null ) {
            this.cv.visitInnerClass( name,
                                     outerName,
                                     innerName,
                                     access );
        }
    }

    public FieldVisitor visitField(final int access,
                                   final String name,
                                   final String desc,
                                   final String signature,
                                   final Object value) {
        this.buf.setLength( 0 );
        this.buf.append( '\n' );
        if ( (access & Opcodes.ACC_DEPRECATED) != 0 ) {
            this.buf.append( this.tab ).append( "// DEPRECATED\n" );
        }
        this.buf.append( this.tab ).append( "// access flags " ).append( access ).append( '\n' );
        if ( signature != null ) {
            this.buf.append( this.tab );
            appendDescriptor( TraceAbstractVisitor.FIELD_SIGNATURE,
                              signature );

            final TraceSignatureVisitor sv = new TraceSignatureVisitor( 0 );
            final SignatureReader r = new SignatureReader( signature );
            r.acceptType( sv );
            this.buf.append( this.tab ).append( "// declaration: " ).append( sv.getDeclaration() ).append( '\n' );
        }

        this.buf.append( this.tab );
        appendAccess( access );
        if ( (access & Opcodes.ACC_ENUM) != 0 ) {
            this.buf.append( "enum " );
        }

        appendDescriptor( TraceAbstractVisitor.FIELD_DESCRIPTOR,
                          desc );
        this.buf.append( ' ' ).append( name );
        if ( value != null ) {
            this.buf.append( " = " );
            if ( value instanceof String ) {
                this.buf.append( "\"" ).append( value ).append( "\"" );
            } else {
                this.buf.append( value );
            }
        }

        this.buf.append( '\n' );
        this.text.add( this.buf.toString() );

        final TraceFieldVisitor tav = createTraceFieldVisitor();
        this.text.add( tav.getText() );

        if ( this.cv != null ) {
            tav.fv = this.cv.visitField( access,
                                         name,
                                         desc,
                                         signature,
                                         value );
        }

        return tav;
    }

    public MethodVisitor visitMethod(final int access,
                                     final String name,
                                     final String desc,
                                     final String signature,
                                     final String[] exceptions) {
        this.buf.setLength( 0 );
        this.buf.append( '\n' );
        if ( (access & Opcodes.ACC_DEPRECATED) != 0 ) {
            this.buf.append( this.tab ).append( "// DEPRECATED\n" );
        }
        this.buf.append( this.tab ).append( "// access flags " ).append( access ).append( '\n' );
        this.buf.append( this.tab );
        appendDescriptor( TraceAbstractVisitor.METHOD_SIGNATURE,
                          signature );

        if ( signature != null ) {
            final TraceSignatureVisitor v = new TraceSignatureVisitor( 0 );
            final SignatureReader r = new SignatureReader( signature );
            r.accept( v );
            final String genericDecl = v.getDeclaration();
            final String genericReturn = v.getReturnType();
            final String genericExceptions = v.getExceptions();

            this.buf.append( this.tab ).append( "// declaration: " ).append( genericReturn ).append( ' ' ).append( name ).append( genericDecl );
            if ( genericExceptions != null ) {
                this.buf.append( " throws " ).append( genericExceptions );
            }
            this.buf.append( '\n' );
        }

        appendAccess( access );
        if ( (access & Opcodes.ACC_NATIVE) != 0 ) {
            this.buf.append( "native " );
        }
        if ( (access & Opcodes.ACC_VARARGS) != 0 ) {
            this.buf.append( "varargs " );
        }
        if ( (access & Opcodes.ACC_BRIDGE) != 0 ) {
            this.buf.append( "bridge " );
        }

        this.buf.append( name );
        appendDescriptor( TraceAbstractVisitor.METHOD_DESCRIPTOR,
                          desc );
        if ( exceptions != null && exceptions.length > 0 ) {
            this.buf.append( " throws " );
            for ( int i = 0; i < exceptions.length; ++i ) {
                appendDescriptor( TraceAbstractVisitor.INTERNAL_NAME,
                                  exceptions[i] );
                this.buf.append( ' ' );
            }
        }

        this.buf.append( '\n' );
        this.text.add( this.buf.toString() );

        final TraceMethodVisitor tcv = createTraceMethodVisitor();
        this.text.add( tcv.getText() );

        if ( this.cv != null ) {
            tcv.mv = this.cv.visitMethod( access,
                                          name,
                                          desc,
                                          signature,
                                          exceptions );
        }

        return tcv;
    }

    public void visitEnd() {
        this.text.add( "}\n" );

        printList( this.pw,
                   this.text );
        this.pw.flush();

        if ( this.cv != null ) {
            this.cv.visitEnd();
        }
    }

    // ------------------------------------------------------------------------
    // Utility methods
    // ------------------------------------------------------------------------

    protected TraceFieldVisitor createTraceFieldVisitor() {
        return new TraceFieldVisitor();
    }

    protected TraceMethodVisitor createTraceMethodVisitor() {
        return new TraceMethodVisitor();
    }

    /**
     * Appends a string representation of the given access modifiers to {@link
     * #buf buf}.
     * 
     * @param access some access modifiers.
     */
    private void appendAccess(final int access) {
        if ( (access & Opcodes.ACC_PUBLIC) != 0 ) {
            this.buf.append( "public " );
        }
        if ( (access & Opcodes.ACC_PRIVATE) != 0 ) {
            this.buf.append( "private " );
        }
        if ( (access & Opcodes.ACC_PROTECTED) != 0 ) {
            this.buf.append( "protected " );
        }
        if ( (access & Opcodes.ACC_FINAL) != 0 ) {
            this.buf.append( "final " );
        }
        if ( (access & Opcodes.ACC_STATIC) != 0 ) {
            this.buf.append( "static " );
        }
        if ( (access & Opcodes.ACC_SYNCHRONIZED) != 0 ) {
            this.buf.append( "synchronized " );
        }
        if ( (access & Opcodes.ACC_VOLATILE) != 0 ) {
            this.buf.append( "volatile " );
        }
        if ( (access & Opcodes.ACC_TRANSIENT) != 0 ) {
            this.buf.append( "transient " );
        }
        // if ((access & Constants.ACC_NATIVE) != 0) {
        // buf.append("native ");
        // }
        if ( (access & Opcodes.ACC_ABSTRACT) != 0 ) {
            this.buf.append( "abstract " );
        }
        if ( (access & Opcodes.ACC_STRICT) != 0 ) {
            this.buf.append( "strictfp " );
        }
        if ( (access & Opcodes.ACC_SYNTHETIC) != 0 ) {
            this.buf.append( "synthetic " );
        }
    }
}