//------------------------------------------------------------------------------
// Copyright (c) 2005, 2006 IBM Corporation and others.
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// which accompanies this distribution, and is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// Contributors:
// IBM Corporation - initial implementation
//------------------------------------------------------------------------------
package org.eclipse.epf.library.edit.configuration;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
import org.eclipse.emf.edit.provider.IItemLabelProvider;
import org.eclipse.emf.edit.provider.IItemPropertySource;
import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
import org.eclipse.emf.edit.provider.ItemProviderAdapter;
import org.eclipse.epf.library.edit.IConfigurable;
import org.eclipse.epf.library.edit.IFilter;
import org.eclipse.epf.library.edit.ILibraryItemProvider;
import org.eclipse.epf.uma.MethodConfiguration;
import org.eclipse.epf.uma.MethodElement;

/**
 * The item provider adapter for a guidance specific folder.
 * 
 * @author Shilpa Toraskar
 * @author Kelvin Low
 * @since 1.0
 */
public class GuidanceItemProvider extends ItemProviderAdapter implements
		IEditingDomainItemProvider, IStructuredItemContentProvider,
		ITreeItemContentProvider, IItemLabelProvider, IItemPropertySource,
		IConfigurable, ILibraryItemProvider {
	List children;

	private String label;

	private Object parent;

	private IFilter filter;

	private Object image;

	private IFilter guidanceFilter;

	private MethodConfiguration methodConfig;

	public class CompareByName implements Comparator {

		public int compare(Object obj1, Object obj2) {
			String name1 = ((MethodElement) obj1).getName();
			String name2 = ((MethodElement) obj2).getName();
			return name1.compareToIgnoreCase(name2);
		}
	}

	/**
	 * Creates a new instance.
	 */
	public GuidanceItemProvider(AdapterFactory adapterFactory,
			MethodConfiguration methodConfig, String name, Object image) {
		super(adapterFactory);
		// methodConfig.eAdapters().add(this);
		label = name;
		this.methodConfig = methodConfig;
		this.image = image;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#getChildren(java.lang.Object)
	 */
	public Collection getChildren(Object object) {
		// MethodConfiguration methodConfig = (MethodConfiguration) target;

		ArrayList filterList = new ArrayList();
		if (guidanceFilter != null) {
			filterList.add(guidanceFilter);
		}
		if (filter != null) {
			filterList.add(filter);
		}
		MethodConfigurationElementList elementList = new MethodConfigurationElementList(
				methodConfig, filterList);
		List elements = elementList.getList();

		// sort by name
		Collections.sort(elements, new CompareByName());
		return elements;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#getNewChildDescriptors(java.lang.Object,
	 *      org.eclipse.emf.edit.domain.EditingDomain, java.lang.Object)
	 */
	public Collection getNewChildDescriptors(Object object,
			EditingDomain editingDomain, Object sibling) {
		return super.getNewChildDescriptors(methodConfig, editingDomain,
				sibling);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#getParent(java.lang.Object)
	 */
	public Object getParent(Object object) {
		if (parent != null)
			return parent;
		if (object instanceof EObject) {
			return super.getParent(object);
		}
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#getImage(java.lang.Object)
	 */
	public Object getImage(Object object) {
		return image;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#getText(java.lang.Object)
	 */
	public String getText(Object object) {
		if (label != null)
			return label;
		return super.getText(object);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.ibm.library.edit.IConfigurable#setFilter(com.ibm.library.edit.IFilter)
	 */
	public void setFilter(IFilter filter) {
		this.filter = filter;
	}

	public void setGuidanceFilter(IFilter filter) {
		guidanceFilter = filter;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.ibm.library.edit.IConfigurable#setLabel(java.lang.String)
	 */
	public void setLabel(String label) {
		this.label = label;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.ibm.library.edit.IConfigurable#setParent(java.lang.Object)
	 */
	public void setParent(Object parent) {
		this.parent = parent;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#getChildrenFeatures(java.lang.Object)
	 */
	public Collection getChildrenFeatures(Object object) {
		return super.getChildrenFeatures(object);
	}
	
	public IFilter getGuidanceFilter() {
		return guidanceFilter;
	}
}