Add workbenchselection json fetcher to SCL interface

[simantics/platform.git] / bundles / org.simantics.browsing.ui.model / src / org / simantics / browsing / ui / model / StandardWorkbenchSelectionElement.java

diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/StandardWorkbenchSelectionElement.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/StandardWorkbenchSelectionElement.java
new file mode 100644 (file)
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--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/StandardWorkbenchSelectionElement.java
@@ -0,0 +1,152 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2012 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * 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:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.browsing.ui.model;
+
+import org.eclipse.core.runtime.IAdaptable;
+import org.simantics.browsing.ui.BuiltinKeys;
+import org.simantics.browsing.ui.GraphExplorer;
+import org.simantics.browsing.ui.NodeContext;
+import org.simantics.browsing.ui.common.AdaptableHintContext;
+import org.simantics.browsing.ui.model.nodetypes.NodeType;
+import org.simantics.db.Resource;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.request.PossibleVariable;
+import org.simantics.db.layer0.request.PossibleVariableRepresents;
+import org.simantics.db.layer0.variable.Variable;
+import org.simantics.ui.selection.AnyResource;
+import org.simantics.ui.selection.AnyVariable;
+import org.simantics.ui.selection.ExplorerColumnContentType;
+import org.simantics.ui.selection.ExplorerInputContentType;
+import org.simantics.ui.selection.WorkbenchSelectionContentType;
+import org.simantics.ui.selection.WorkbenchSelectionElement;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class StandardWorkbenchSelectionElement extends AdaptableHintContext {
+
+       private static final Logger LOGGER = LoggerFactory.getLogger(StandardWorkbenchSelectionElement.class);
+       
+       public static WorkbenchSelectionElement nodeContextToWorkbenchSelectionElement (NodeContext context) {
+               return (new StandardWorkbenchSelectionElement(context));
+       }
+       
+    final public WorkbenchSelectionElement wse;
+    final public Object content;
+    final public Resource resource;
+    final public Variable variable;
+    final public Object input;
+    
+    private WorkbenchSelectionElement extractWse(Object content) {
+        if(content instanceof NodeContext) {
+            NodeContext context = (NodeContext)content;
+            Object input = context.getConstant(NodeType.TYPE);
+            if(input instanceof NodeType) 
+                return ((NodeType)input).getWorkbenchSelectionElement(context);
+        }
+        return null;
+    }
+    
+    private Resource extractResource(Object content) {
+       if(content instanceof NodeContext) {
+               NodeContext context = (NodeContext)content;
+               Object input = context.getConstant(BuiltinKeys.INPUT);
+               if(input instanceof Resource) return (Resource)input;
+               if(input instanceof IAdaptable) {
+                       Resource var = (Resource)((IAdaptable)input).getAdapter(Resource.class);
+                       if(var != null) return var;
+               }
+       }
+       return null;
+    }
+    
+    private Variable extractVariable(Object content) {
+       if(content instanceof NodeContext) {
+               NodeContext context = (NodeContext)content;
+               Object input = context.getConstant(BuiltinKeys.INPUT);
+               if(input instanceof Variable) return (Variable)input;
+               if(input instanceof IAdaptable) {
+                       Variable var = (Variable)((IAdaptable)input).getAdapter(Variable.class);
+                       if(var != null) return var;
+               }
+       }
+       return null;
+    }
+
+    private Object extractInput(Object content) {
+       if(content instanceof NodeContext) {
+               NodeContext context = (NodeContext)content;
+               return context.getConstant(BuiltinKeys.INPUT);
+       }
+       return null;
+    }
+
+    public StandardWorkbenchSelectionElement(Object content) {
+        super(new Key[0]);
+        this.content = content;
+        this.wse = extractWse(content);
+        this.resource = extractResource(content);
+        this.variable = extractVariable(content);
+        this.input = extractInput(content);
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public <T> T getContent(WorkbenchSelectionContentType<T> contentType) {
+        if (wse != null) {
+            T result = wse.getContent(contentType);
+            if (result != null)
+                return result;
+        }
+
+        if (contentType instanceof AnyResource) {
+            if (resource != null)
+                return (T) resource;
+            if (variable == null)
+                return null;
+            try {
+                return (T) ((AnyResource) contentType).processor.syncRequest(new PossibleVariableRepresents(variable));
+            } catch (DatabaseException e) {
+                LOGGER.error("Unexpected error occurred while resolving Resource from Variable " + variable, e);
+            }
+        }
+        else if (contentType instanceof AnyVariable) {
+            if (variable != null)
+                return (T) variable;
+            if (resource == null)
+                return null;
+            try {
+                return (T) ((AnyVariable) contentType).processor.syncRequest(new PossibleVariable(resource));
+            } catch (DatabaseException e) {
+                LOGGER.error("Unexpected error occurred while resolving Variable from Resource " + resource, e);
+            }
+        } else if (contentType instanceof ExplorerInputContentType) {
+            return (T) input;
+        }
+        return null;
+    }
+
+    @SuppressWarnings("rawtypes")
+    @Override
+    public Object getAdapter(Class adapter) {
+       if(WorkbenchSelectionElement.class == adapter) {
+               return wse;
+       }
+       if(NodeContext.class == adapter) {
+           if(content instanceof NodeContext)
+               return (NodeContext)content;
+           else
+               return null;
+       }
+       return super.getAdapter(adapter);
+    }
+
+}
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