ContributionItemService.java

/**
 * 
 */
package com.topsun.posclient.application;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;

import org.eclipse.jface.action.IContributionItem;

public class ContributionItemService implements IContributionItemService {
	private List<ContributionItemEntry> entryList = new ArrayList<ContributionItemEntry>();
	private boolean loaded = false;

	private void load() {
		if (!loaded) {
			synchronized (this) {
				if (!loaded) {
					ContributionItemDescriptor[] descriptors = ContributionItemsRegistry.getInstance().getDescriptors();
					entryList = new ArrayList<ContributionItemEntry>(descriptors.length);
					for (ContributionItemDescriptor itemDescriptor : descriptors) {
//						if (!DesktopTemplateConfig.INSTANCE.applicationIsEnabled(itemDescriptor.getApplicationId())) {
//							continue;
//						}
//						if (!DesktopTemplateConfig.INSTANCE.controlIsVisible(itemDescriptor.getId())) {
//							continue;
//						}
//						if (!DesktopTemplateConfig.INSTANCE.actionItemIsEnabled(itemDescriptor.getId(), itemDescriptor.isDefaultItem())) {
//							continue;
//						}
						entryList.add(new ContributionItemEntry(itemDescriptor.getCategory(), itemDescriptor.createItem(), itemDescriptor.getApplicationId()));
					}
					loaded = true;
				}
			}
		}
	}

	public void insertHead(String category, IContributionItem item) {
		if (category == null || item == null) {
			return;
		}
		load();
		entryList.add(0, new ContributionItemEntry(category, item, null));
	}

	public void insertTail(String category, IContributionItem item) {
		if (category == null || item == null) {
			return;
		}
		load();
		entryList.add(entryList.size(), new ContributionItemEntry(category, item, null));
	}

	public void insertBefore(String category, String itemId,
			IContributionItem item) {
		if (category == null || itemId == null || item == null) {
			return;
		}
		load();
		int index = getIndex(category, itemId);
		if (index < 0) {
			insertTail(category, item);
		} else {
			entryList.add(index, new ContributionItemEntry(category, item, null));
		}
	}

	public void insertAfter(String category, String itemId,
			IContributionItem item) {
		if (category == null || itemId == null || item == null) {
			return;
		}
		load();
		int index = getIndex(category, itemId);
		if (index < 0) {
			insertTail(category, item);
		} else {
			entryList.add(index + 1, new ContributionItemEntry(category, item, null));
		}
	}

	public void removeItem(String category, String itemId) {
		if (category == null || itemId == null) {
			return;
		}
		load();
		int index = getIndex(category, itemId);
		if (index < 0) {
			return;
		} else {
			entryList.remove(index).item.dispose();
		}
	}

	public IContributionItem getItem(String category, String itemId) {
		if (category == null || itemId == null) {
			return null;
		}
		load();
		int index = getIndex(category, itemId);
		if (index < 0) {
			return null;
		} else {
			return entryList.get(index).item;
		}
	}

	public IContributionItem[] getItems(String category) {
		if (category == null) {
			return new IContributionItem[0];
		}
		load();
		List<IContributionItem> list = new ArrayList<IContributionItem>();
		for (ContributionItemEntry entry : entryList) {
			if (entry.category.equals(category)) {
				list.add(entry.item);
			}
		}
		return list.toArray(new IContributionItem[list.size()]);
	}

	public IContributionItem[] getItems() {
		load();
		List<IContributionItem> list = new ArrayList<IContributionItem>();
		for (ContributionItemEntry entry : entryList) {
			list.add(entry.item);
		}
		return list.toArray(new IContributionItem[list.size()]);
	}

	public String getCategory(IContributionItem item) {
		if (item == null) {
			return null;
		}
		load();
		for (int i = 0; i < entryList.size(); i++) {
			ContributionItemEntry entry = entryList.get(i);
			if (entry.item.equals(item)) {
				return entry.category;
			}
		}
		return null;
	}

	private int getIndex(String category, String itemId) {
		for (int i = 0; i < entryList.size(); i++) {
			ContributionItemEntry entry = entryList.get(i);
			if (entry.category.equals(category) && entry.item.getId().equals(itemId)) {
				return i;
			}
		}
		return -1;
	}

	class ContributionItemEntry {
		String category;
		IContributionItem item;
		String applicationId;

		ContributionItemEntry(String category, IContributionItem item,
				String applicationId) {
			this.category = (category == null ? "other" : category);
			this.applicationId = applicationId;
			this.item = item;
		}
	}

	public String[] getCategorys() {
		LinkedHashMap<String, String> categorys = new LinkedHashMap<String, String>();
		load();
		for (int i = 0; i < entryList.size(); i++) {
			ContributionItemEntry entry = entryList.get(i);
			categorys.put(entry.category, entry.category);
		}
		return categorys.keySet().toArray(new String[categorys.size()]);
	}

	public String getApplicationId(IContributionItem item) {
		if (item == null) {
			return null;
		}
		load();
		for (int i = 0; i < entryList.size(); i++) {
			ContributionItemEntry entry = entryList.get(i);
			if (entry.item.equals(item)) {
				return entry.applicationId;
			}
		}
		return null;
	}
}