BindingListModelListModel.java

/* BindingListModelListModel.java

{{IS_NOTE
	Purpose:
		
	Description:
		
	History:
		Jul 13, 2011 15:06:25 AM, Created by peterkuo
}}IS_NOTE

Copyright (C) 2011 Potix Corporation. All Rights Reserved.
*/

package org.zkoss.zkplus.databind;

import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.zkoss.lang.Objects;
import org.zkoss.zul.ListModel;
import org.zkoss.zul.event.ListDataListener;
import org.zkoss.zul.ext.Selectable;
import org.zkoss.zul.ext.SelectionControl;

/**
 * <p>This is the {@link BindingListModel} as a {@link ListModel} to be used with 
 * {@link org.zkoss.zul.Listbox}, {@link org.zkoss.zul.Grid},  
 * and {@link DataBinder}.
 * Add or remove the contents of this model as a ListModel would cause the associated Listbox or Grid to change accordingly.</p> 
 *
 * @author peterkuo
 * @since 5.0.8
 * @deprecated As of release 7.0.0, replace with new ZK binding.
 */
public class BindingListModelListModel<E>
		implements BindingListModel<E>, Selectable<E>, java.io.Serializable, BindingListModelExt<E> {

	private static final long serialVersionUID = -4454049848612772393L;

	protected ListModel<E> _model;
	private Selectable<E> _selectable;
	private boolean distinct = true;

	public BindingListModelListModel(ListModel<E> model) {
		_model = model;
	}

	public BindingListModelListModel(ListModel<E> model, boolean distinct) {
		_model = model;
		this.distinct = distinct;
		if (model instanceof Set || model instanceof Map) {
			distinct = true;
		}
	}

	//--BindingListModel--//
	public int indexOf(Object obj) {
		for (int j = getSize(); j-- > 0;) {
			if (Objects.equals(getElementAt(j), obj)) {
				return j;
			}
		}
		return -1;
	}

	public E getElementAt(int index) {
		return _model.getElementAt(index);
	}

	public int getSize() {
		return _model.getSize();
	}

	public void addListDataListener(ListDataListener l) {
		_model.addListDataListener(l);
	}

	public void removeListDataListener(ListDataListener l) {
		_model.removeListDataListener(l);
	}

	public ListModel<E> getInnerModel() {
		return _model;
	}

	private static class EmptySelectable<E> implements Selectable<E>, java.io.Serializable {
		private static final long serialVersionUID = 7942486785062723611L;

		private SelectionControl<E> _ctrl;

		public void setSelectionControl(SelectionControl ctrl) {
			_ctrl = ctrl;
		}

		public SelectionControl getSelectionControl() {
			return _ctrl;
		}

		public Set<E> getSelection() {
			return null;
		}

		public void setSelection(Collection<? extends E> selection) {
		}

		public boolean isSelected(Object obj) {
			return false;
		}

		public boolean isSelectionEmpty() {
			return false;
		}

		public boolean addToSelection(E obj) {
			return false;
		}

		public boolean removeFromSelection(Object obj) {
			return false;
		}

		public void clearSelection() {
		}

		public void setMultiple(boolean multiple) {
		}

		public boolean isMultiple() {
			return false;
		}
	}

	@SuppressWarnings("unchecked")
	private Selectable<E> getSelectModel() {
		if (_model instanceof Selectable<?>)
			return (Selectable<E>) _model;

		if (_selectable == null) {
			_selectable = new EmptySelectable<E>();
		}

		return _selectable;
	}

	public void setSelectionControl(SelectionControl ctrl) {
		getSelectModel().setSelectionControl(ctrl);
	}

	public SelectionControl getSelectionControl() {
		return getSelectModel().getSelectionControl();
	}

	public Set<E> getSelection() {
		return getSelectModel().getSelection();
	}

	public void setSelection(Collection<? extends E> selection) {
		getSelectModel().setSelection(selection);
	}

	public boolean isSelected(Object obj) {
		return getSelectModel().isSelected(obj);
	}

	public boolean isSelectionEmpty() {
		return getSelectModel().isSelectionEmpty();
	}

	public boolean addToSelection(E obj) {
		return getSelectModel().addToSelection(obj);
	}

	public boolean removeFromSelection(Object obj) {
		return getSelectModel().removeFromSelection(obj);
	}

	public void clearSelection() {
		getSelectModel().clearSelection();
	}

	public void setMultiple(boolean multiple) {
		getSelectModel().setMultiple(multiple);
	}

	public boolean isMultiple() {
		return getSelectModel().isMultiple();
	}

	//--BindingListModelExt--//
	public int[] indexesOf(Object elm) {
		if (isDistinct()) {
			final int idx = indexOf(elm);
			return idx < 0 ? new int[0] : new int[] { idx };
		} else {
			final List<Integer> indexes = new LinkedList<Integer>();

			for (int ind = getSize(); ind-- > 0;) {
				//final Iterator<E> it = _list.iterator(); it.hasNext(); ++j
				if (Objects.equals(elm, getElementAt(ind))) {
					indexes.add(Integer.valueOf(ind));
				}
			}

			int j = 0;
			final int[] result = new int[indexes.size()];
			j = 0;
			for (final Iterator<Integer> it = indexes.iterator(); it.hasNext(); ++j) {
				final int idx = it.next().intValue();
				result[j] = idx;
			}
			return result;
		}
	}

	public boolean isDistinct() {
		return distinct;
	}
}