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/**
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* Copyright (C) 2015 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.view;
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import java.util.HashMap;
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import java.util.Map;
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import org.eclipse.core.commands.Command;
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import org.eclipse.core.runtime.IConfigurationElement;
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import org.eclipse.core.runtime.IExtensionRegistry;
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import org.eclipse.core.runtime.Platform;
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import org.eclipse.e4.core.commands.ECommandService;
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import org.eclipse.e4.core.commands.EHandlerService;
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import org.eclipse.jface.viewers.TreeNode;
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import eu.etaxonomy.cdm.persistence.dto.ReferencingObjectDto;
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import eu.etaxonomy.cdm.persistence.dto.UuidAndTitleCache;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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/**
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* Scans eu.etaxonomy.taxeditor.store.cdmViewer extension point.
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* @author pplitzner
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* @date Jul 7, 2015
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*/
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public class CdmViewerUtilE4 {
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/**
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* Returns a map of available commands to open the given input. Keys are the
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* command IDs and values are their string representations.
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*
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* @param input
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* the object which should be handled by the available commands
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* @return a key-value map of available commands and their string
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* representation
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*/
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public static Map<Command, String> getAvailableViewers(Object input, ECommandService commandService,
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EHandlerService handlerService){
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Map<Command, String> commandViewerNameMap = new HashMap<>();
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Class<?> inputClass = null;
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if(input!=null){
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if (input instanceof ReferencingObjectDto){
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ReferencingObjectDto dto = (ReferencingObjectDto)input;
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inputClass = dto.getOpenInTarget() == null ? dto.getType() : dto.getOpenInTarget().getType();
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}
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//for generic UuidAndTitleCache objects try to load the object
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else if (input instanceof UuidAndTitleCache){
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UuidAndTitleCache<?> uuidAndTitleCache = (UuidAndTitleCache<?>)input;
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inputClass = uuidAndTitleCache.getType();
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}
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//for tree nodes get the value resp. the object of the node
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else if (input instanceof TreeNode){
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TreeNode treeNode = (TreeNode)input;
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inputClass = treeNode.getValue() == null? null: treeNode.getValue().getClass();
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}
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if (inputClass == null){
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inputClass = input.getClass();
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}
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}
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if(inputClass!=null){
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IExtensionRegistry reg = Platform.getExtensionRegistry();
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IConfigurationElement[] extensions = reg
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.getConfigurationElementsFor("eu.etaxonomy.taxeditor.store.cdmViewer"); //$NON-NLS-1$
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for (IConfigurationElement configElement : extensions) {
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try {
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if(configElement.getName().equals("viewCommandMapping")){ //$NON-NLS-1$
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String commandId = configElement.getAttribute("commandId"); //$NON-NLS-1$
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String viewerName = configElement.getAttribute("viewerName"); //$NON-NLS-1$
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Class<?> selectionClass = Class.forName(configElement.getAttribute("selection")); //$NON-NLS-1$
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if(selectionClass!=null
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&& commandId!=null
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&& viewerName!=null
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&& selectionClass.isAssignableFrom(inputClass)){
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Command command = commandService.getCommand(commandId);
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commandViewerNameMap.put(command, viewerName);
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}
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}
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} catch (ClassNotFoundException e) {
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MessagingUtils.error(CdmViewerChooser.class, "Could not initalize selection class element of cdmViewer extension", e); //$NON-NLS-1$
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}
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}
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}
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return commandViewerNameMap;
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}
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}
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