X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.databoard%2Fsrc%2Forg%2Fsimantics%2Fdataboard%2Ftype%2FOptionalType.java;fp=bundles%2Forg.simantics.databoard%2Fsrc%2Forg%2Fsimantics%2Fdataboard%2Ftype%2FOptionalType.java;h=d704e86b36012468a2d2c4329b22a17b84c7e504;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/type/OptionalType.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/type/OptionalType.java
new file mode 100644
index 000000000..d704e86b3
--- /dev/null
+++ b/bundles/org.simantics.databoard/src/org/simantics/databoard/type/OptionalType.java
@@ -0,0 +1,109 @@
+/*******************************************************************************
+ *  Copyright (c) 2010 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.databoard.type;
+
+import java.util.Set;
+
+import org.simantics.databoard.accessor.error.ReferenceException;
+import org.simantics.databoard.accessor.reference.ChildReference;
+import org.simantics.databoard.accessor.reference.ComponentReference;
+import org.simantics.databoard.accessor.reference.IndexReference;
+import org.simantics.databoard.accessor.reference.KeyReference;
+import org.simantics.databoard.accessor.reference.LabelReference;
+import org.simantics.databoard.accessor.reference.NameReference;
+import org.simantics.databoard.util.IdentityPair;
+
+public class OptionalType extends Datatype {
+    public Datatype componentType;
+    
+    public OptionalType() {    	
+    }
+    
+    public OptionalType(Datatype componentType) {
+    	this.componentType = componentType;
+    }
+    
+    public Datatype getComponentType() {
+    	return componentType;
+    }
+    
+    @Override
+    public int getComponentCount() {
+    	return 1;
+    }
+    
+    @Override
+    public Datatype getComponentType(int index) {
+    	if (index!=0) throw new IllegalArgumentException();
+    	return componentType;
+    }
+    
+    @Override
+    public Datatype getComponentType(ChildReference path) {
+    	if (path==null) return this;
+    	if (path instanceof KeyReference) throw new IllegalArgumentException("KeyReference is not supported in OptionalType"); 
+    	if (path instanceof NameReference) throw new IllegalArgumentException("NameReference is not supported in OptionalType"); 
+    	if (path instanceof IndexReference && ((IndexReference) path).index!=0) throw new IllegalArgumentException("Index out of bounds");
+    	if (path instanceof LabelReference && !((LabelReference) path).label.equals("v")) throw new IllegalArgumentException("Unknown label");
+    	return componentType.getComponentType(path.childReference);
+    }    
+    
+	@Override
+	protected void collectSubtypes(Set<Datatype> subtypes,
+		Set<Datatype> recursiveSubtypes) {
+		componentType.collectSubtypes(subtypes, recursiveSubtypes);
+	}
+    
+    @Override
+    public int hashCode() {
+    	return componentType.hashCode() + metadataHashCode();
+    }
+    
+    @Override
+    protected boolean deepEquals(Object obj, Set<IdentityPair<Datatype, Datatype>> compareHistory) {
+		if (this==obj) return true;
+		if (obj instanceof OptionalType == false) return false;
+		if ( !hasEqualMetadata(obj) ) return false;
+		OptionalType other = (OptionalType) obj;
+		return componentType.deepEquals(other.componentType, compareHistory);
+    }     
+
+	@Override
+	public void accept(Visitor1 v, Object obj) {
+	    v.visit(this, obj);        
+	}
+
+	@Override
+	public <T> T accept(Visitor<T> v) {
+	    return v.visit(this);
+	}	
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public <T extends Datatype> T getChildType(ChildReference reference) throws ReferenceException {
+		if (reference==null) return (T) this;
+
+		if (reference instanceof LabelReference) {
+			LabelReference lr = (LabelReference) reference;
+			if (lr.label.equals("o")) {
+				return componentType.getChildType(reference.getChildReference());
+			}			
+		}
+		
+		if (reference instanceof ComponentReference) {
+			return componentType.getChildType(reference.getChildReference());
+		} 
+		
+		throw new ReferenceException(reference.getClass()+" is not a reference of OptionalType");		
+	}
+	
+}