/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * particular file as subject to the "Classpath" exception as provided

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

package com.sun.corba.se.impl.orbutil ;

import java.util.Arrays ;

public abstract class ObjectWriter {

    public static ObjectWriter make( boolean isIndenting,

        int initialLevel, int increment )

    {

        if (isIndenting)

            return new IndentingObjectWriter( initialLevel, increment ) ;

        else

            return new SimpleObjectWriter() ;

    }

    public abstract void startObject( Object obj ) ;

    public abstract void startElement() ;

    public abstract void endElement() ;

    public abstract void endObject( String str ) ;

    public abstract void endObject() ;

    public String toString() { return result.toString() ; }

    public void append( boolean arg ) { result.append( arg ) ; }

    public void append( char arg ) { result.append( arg ) ; }

    public void append( short arg ) { result.append( arg ) ; }

    public void append( int arg ) { result.append( arg ) ; }

    public void append( long arg ) { result.append( arg ) ; }

    public void append( float arg ) { result.append( arg ) ; }

    public void append( double arg ) { result.append( arg ) ; }

    public void append( String arg ) { result.append( arg ) ; }

//=================================================================================================

// Implementation

//=================================================================================================

    protected StringBuffer result ;

    protected ObjectWriter()

    {

        result = new StringBuffer() ;

    }

    protected void appendObjectHeader( Object obj )

    {

        result.append( obj.getClass().getName() ) ;

        result.append( "<" ) ;

        result.append( System.identityHashCode( obj ) ) ;

        result.append( ">" ) ;

        Class compClass = obj.getClass().getComponentType() ;

        if (compClass != null) {

            result.append( "[" ) ;

            if (compClass == boolean.class) {

                boolean[] arr = (boolean[])obj ;

                result.append( arr.length ) ;

                result.append( "]" ) ;

            } else if (compClass == byte.class) {

                byte[] arr = (byte[])obj ;

                result.append( arr.length ) ;

                result.append( "]" ) ;

            } else if (compClass == short.class) {

                short[] arr = (short[])obj ;

                result.append( arr.length ) ;

                result.append( "]" ) ;

            } else if (compClass == int.class) {

                int[] arr = (int[])obj ;

                result.append( arr.length ) ;

                result.append( "]" ) ;

            } else if (compClass == long.class) {

                long[] arr = (long[])obj ;

                result.append( arr.length ) ;

                result.append( "]" ) ;

            } else if (compClass == char.class) {

                char[] arr = (char[])obj ;

                result.append( arr.length ) ;

                result.append( "]" ) ;

            } else if (compClass == float.class) {

                float[] arr = (float[])obj ;

                result.append( arr.length ) ;

                result.append( "]" ) ;

            } else if (compClass == double.class) {

                double[] arr = (double[])obj ;

                result.append( arr.length ) ;

                result.append( "]" ) ;

            } else { // array of object

                java.lang.Object[] arr = (java.lang.Object[])obj ;

                result.append( arr.length ) ;

                result.append( "]" ) ;

            }

        }

        result.append( "(" ) ;

    }

    /** Expected patterns:

    * startObject endObject( str )

    *   header( elem )\n

    * startObject ( startElement append* endElement ) * endObject

    *   header(\n

    *       append*\n *

    *   )\n

    */

    private static class IndentingObjectWriter extends ObjectWriter {

        private int level ;

        private int increment ;

        public IndentingObjectWriter( int initialLevel, int increment )

        {

            this.level = initialLevel ;

            this.increment = increment ;

            startLine() ;

        }

        private void startLine()

        {

            char[] fill = new char[ level * increment ] ;

            Arrays.fill( fill, ' ' ) ;

            result.append( fill ) ;

        }

        public void startObject( java.lang.Object obj )

        {

            appendObjectHeader( obj ) ;

            level++ ;

        }

        public void startElement()

        {

            result.append( "\n" ) ;

            startLine() ;

        }

        public void endElement()

        {

        }

        public void endObject( String str )

        {

            level-- ;

            result.append( str ) ;

            result.append( ")" ) ;

        }

        public void endObject( )

        {

            level-- ;

            result.append( "\n" ) ;

            startLine() ;

            result.append( ")" ) ;

        }

    }

    private static class SimpleObjectWriter extends ObjectWriter {

        public void startObject( java.lang.Object obj )

        {

            appendObjectHeader( obj ) ;

            result.append( " " ) ;

        }

        public void startElement()

        {

            result.append( " " ) ;

        }

        public void endObject( String str )

        {

            result.append( str ) ;

            result.append( ")" ) ;

        }

        public void endElement()

        {

        }

        public void endObject()

        {

            result.append( ")" ) ;

        }

    }

}