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package org.netbeans.validation.api.conversion;

import java.util.ArrayList;
import java.util.List;
import javax.swing.ListSelectionModel;
import org.netbeans.validation.api.AbstractValidator;
import org.netbeans.validation.api.Problems;
import org.netbeans.validation.api.Validator;

/**
 *
 * @author Hugo Heden
 */
class SelectedIndicesToListSelectionModelConverter extends Converter <Integer[], ListSelectionModel> {

    SelectedIndicesToListSelectionModelConverter() {
        super (Integer[].class, ListSelectionModel.class);
    }

    @Override
    public Validator<ListSelectionModel> convert(Validator<Integer[]> from) {
        return new V(from);
    }

    private static final class V extends AbstractValidator<ListSelectionModel> {
        private final Validator<Integer[]> wrapped;

        public V(Validator<Integer[]> wrapped) {
            super (ListSelectionModel.class);
            this.wrapped = wrapped;
        }

        @Override
        public void validate(Problems problems, String compName, ListSelectionModel model) {
            if(model.isSelectionEmpty()){
                wrapped.validate(problems, compName, new Integer[0]);
            } else {
                List<Integer> list = new ArrayList<Integer>(model.getMaxSelectionIndex()+1 - model.getMinSelectionIndex());
                for ( int i = model.getMinSelectionIndex(); i <= model.getMaxSelectionIndex(); ++i ){
                    if( model.isSelectedIndex(i)){
                        list.add(i);
                    }
                }
                wrapped.validate(problems, compName, list.toArray(new Integer[list.size()]));
            }
        }
    }
}
