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import java.lang.reflect.Array ;
public abstract class RJavaArrayIterator {
protected int[] dimensions;
protected int nd ;
protected int[] index ;
protected int[] dimprod ;
protected Object array ;
protected int increment;
protected int position ;
protected int start ;
public Object getArray(){
return array ;
}
/**
* @return the class name of the array
*/
public String getArrayClassName(){
return array.getClass().getName();
}
public int[] getDimensions(){
return dimensions;
}
public RJavaArrayIterator(){
dimensions = null;
index = null ;
dimprod = null ;
array = null ;
}
public RJavaArrayIterator(int[] dimensions){
this.dimensions = dimensions ;
nd = dimensions.length ;
if( nd > 1){
index = new int[ nd-1 ] ;
dimprod = new int[ nd-1 ] ;
for( int i=0; i<(nd-1); i++){
index[i] = 0 ;
dimprod[i] = (i==0) ? dimensions[i] : ( dimensions[i]*dimprod[i-1] );
increment = dimprod[i] ;
}
}
position = 0 ;
start = 0;
}
public RJavaArrayIterator(int d1){
this( new int[]{ d1} ) ;
}
protected Object next( ){
/* get the next array and the position of the first elemtn in the flat array */
Object o = array ;
for( int i=0; i<index.length; i++){
o = Array.get( o, index[i] ) ;
if( i == 0 ) {
start = index[i];
} else {
start += index[i] * dimprod[i-1] ;
}
}
/* increment the index */
for( int i=index.length-1; i>=0; i--){
if( (index[i] + 1) == dimensions[i] ){
index[i] = 0 ;
} else{
index[i] = index[i] + 1 ;
break;
}
}
position++ ;
return o;
}
protected boolean hasNext( ){
return position < increment ;
}
}
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