X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.utils.datastructures%2Fsrc%2Forg%2Fsimantics%2Futils%2Fdatastructures%2Fmap%2FTuple.java;fp=bundles%2Forg.simantics.utils.datastructures%2Fsrc%2Forg%2Fsimantics%2Futils%2Fdatastructures%2Fmap%2FTuple.java;h=a57a0a813d258c3c7bed1b35a923af09bbc6d353;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

diff --git a/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/map/Tuple.java b/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/map/Tuple.java
new file mode 100644
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+++ b/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/map/Tuple.java
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+/*******************************************************************************
+ * Copyright (c) 2007, 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.utils.datastructures.map;
+
+import java.io.Externalizable;
+import java.io.IOException;
+import java.io.ObjectInput;
+import java.io.ObjectOutput;
+import java.io.Serializable;
+import java.util.Arrays;
+
+/**
+ * n-tuple (all fields are set) or n-tuple query (some fields possibly null)
+ *
+ * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
+ */
+public class Tuple implements Serializable, Externalizable {
+
+	Object[] fields;
+	private int hashCode;
+	int associativity;
+	
+	Tuple() {}
+	
+	public Tuple(Object ... fields)
+	{
+		this.fields = fields;
+		hashCode = Arrays.hashCode(fields);
+		int mask = 1;
+		for (Object o : fields) {
+			if (o!=null) associativity |= mask;
+			mask <<= 1;
+		}
+	}
+	
+	@Override
+	public int hashCode() {
+		return hashCode;
+	}
+	
+	@Override
+	public boolean equals(Object obj) {
+        if (obj == null) return false;
+        if (!(obj.getClass().equals(this.getClass()))) return false;        
+		Tuple other = (Tuple) obj;
+		return Arrays.deepEquals(fields, other.fields);
+	}
+	
+    @Override
+    public String toString() {
+    	return Arrays.toString(fields);
+    }
+    
+    public Object getField(int index)
+    {
+        return fields[index];
+    }
+    
+    public Object tryGetField(int index)
+    {
+        return index >= 0 && index < fields.length ? fields[index] : null;
+    }
+    
+    @SuppressWarnings("unchecked")
+    public <T> T getTypedField(int index)
+    {
+    	return (T) fields[index];
+    }
+    
+    @SuppressWarnings("unchecked")
+    public <T> T tryGetTypedField(int index)
+    {
+        return index >= 0 && index < fields.length ? (T) fields[index] : null;
+    }
+    
+    public Object[] getFields()
+    {
+    	return fields;
+    }
+    
+    public int getLevel()
+    {
+    	return fields.length;
+    }
+    
+    public int getAssociativity() 
+    {
+    	return associativity;
+    }
+
+	/**
+	 * Tuple is full if all fields are set (not null) 
+	 * @return <code>true</code> if all fields are set
+	 */
+	public boolean isFull()
+	{
+		return associativity == (1 << fields.length)-1;
+	}
+    
+	@Override
+	public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
+		int count = in.readInt();
+		fields = new Object[count];
+		for (int i=0; i<count; i++)
+			fields[i] = in.readObject();
+		hashCode = Arrays.hashCode(fields);
+	}
+
+	@Override
+	public void writeExternal(ObjectOutput out) throws IOException {
+		out.writeInt(fields.length);
+		for (Object o : fields)
+			out.writeObject(o);
+	}
+		
+}
+