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package com.datastax.data.dataset;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.Collections;
import java.util.List;


public class DataSelector {
    
    
    protected static final String DEFAULT_NAME_PREFIX = "DataSelector";

    
    private static final NameGenerator NAMEGEN = new NameGenerator(DEFAULT_NAME_PREFIX);

    private DataTable table;
    private String name;
    
    private BitSet indices = new BitSet(0);
    private int[] helper = new int[1];
    private PropertyChangeSupport pcs = new PropertyChangeSupport(this);
	    
    
    public DataSelector(DataTable table) {
        assert table != null;
        this.table = table;
        name = NAMEGEN.generateName(this);
        if (table != null && table.getRowCount() > 0) {
            setRowIndices(new int[]{0});
        }
    }
    
    
    public DataTable getDataTable() {
        return table;
    }
    
    public DataTable getTable() {
        return table;
    }

    
    void removeFromTable() {
        table = null;
    }
    
    
    public void setName(String name) {
        if (this.name != name) {
            assert name != null && !name.trim().equals("");
            String oldName = this.name;
            this.name = name;
            pcs.firePropertyChange("name", oldName, name);
        }
    }

    public String getName() {
        return name;
    }

    public List getRowIndices() {
        List results = new ArrayList(indices.cardinality());
        int n=-1;
        for(int i=0; i 0 ? indices.nextSetBit(0) : -1;
    }
    
    public void setRowIndices(int[] rowIndices) {
        
        List oldIndices = getRowIndices();
    	indices.clear();
    	for (int index : rowIndices) {
    		indices.set(index);
    	}

        
        
        
    	pcs.firePropertyChange("rowIndices", oldIndices, getRowIndices());
    }

    
    public void setRowIndex(int index) {
        assert index < table.getRowCount();
        if (index >= 0) {
            helper[0] = index;
            setRowIndices(helper);
        } else {
            setRowIndices(new int[0]);
        }
    }
    
    public void setRowIndex(DataRow row) {
        assert row != null;

        setRowIndices(new int[]{table.indexOfRow(row)});
    }
    
    
    public void addPropertyChangeListener(PropertyChangeListener listener) {
        pcs.addPropertyChangeListener(listener);
    }
    
   
    public void addPropertyChangeListener(String property, PropertyChangeListener listener) {
        pcs.addPropertyChangeListener(property,  listener);
    }
    
    
    public void removePropertyChangeListener(PropertyChangeListener listener) {
        pcs.removePropertyChangeListener(listener);
    }
    
    
    public void removePropertyChangeListener(String propertyName, PropertyChangeListener listener) {
        pcs.removePropertyChangeListener(propertyName,  listener);
    }
    
}