X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.databoard%2Fsrc%2Forg%2Fsimantics%2Fdataboard%2Fbinding%2Fclassfactory%2FSignatureVisitor.java;fp=bundles%2Forg.simantics.databoard%2Fsrc%2Forg%2Fsimantics%2Fdataboard%2Fbinding%2Fclassfactory%2FSignatureVisitor.java;h=6c001889760510a5fbf09ffbed2a784094ee7c06;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/classfactory/SignatureVisitor.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/classfactory/SignatureVisitor.java
new file mode 100644
index 000000000..6c0018897
--- /dev/null
+++ b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/classfactory/SignatureVisitor.java
@@ -0,0 +1,192 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2011 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.binding.classfactory;
+
+import java.util.IdentityHashMap;
+
+import org.simantics.databoard.Datatypes;
+import org.simantics.databoard.type.ArrayType;
+import org.simantics.databoard.type.BooleanType;
+import org.simantics.databoard.type.ByteType;
+import org.simantics.databoard.type.Datatype;
+import org.simantics.databoard.type.DoubleType;
+import org.simantics.databoard.type.FloatType;
+import org.simantics.databoard.type.IntegerType;
+import org.simantics.databoard.type.LongType;
+import org.simantics.databoard.type.MapType;
+import org.simantics.databoard.type.OptionalType;
+import org.simantics.databoard.type.RecordType;
+import org.simantics.databoard.type.StringType;
+import org.simantics.databoard.type.UnionType;
+import org.simantics.databoard.type.VariantType;
+
+/**
+ * Signature Visitor builds a signature string from a datatype.
+ * The argument is StringBuilder.
+ * 
+ * Signature is construtructed with the following notation.
+ * 
+ *   s                        StringType
+ *   z                        BooleanType
+ *   d                        DoubleType
+ *   f                        FloatType
+ *   i                        IntegerType
+ *   b                        ByteType
+ *   j                        LongType
+ *   R                        Referable RecordType
+ *   o*                       OptionalType, * denotes componentType
+ *   a*                       ArrayType, * denotes componentType
+ *   r**e                     RecordType, ** denotes fields
+ *   u                        UnionType, * denotes components
+ *   m**                      MapType, ** denotes keyType and valueType
+ *   t                        Datatype
+ *   
+ * For example, The signature of UUID.class is "rjje" 
+ * 
+ * @author toni.kalajainen
+ */
+public class SignatureVisitor implements Datatype.Visitor1 {
+	
+	public StringBuilder sb = new StringBuilder();
+	public int hashcode = 0xbcbcbca;
+	public IdentityHashMap<Datatype, Boolean> visited = new IdentityHashMap<Datatype, Boolean>();
+	
+	public static String toSignature(Datatype type)
+	{
+		SignatureVisitor sv = new SignatureVisitor();
+		type.accept( sv, null );
+		String sig = sv.sb.toString();
+		return sig;
+	}	
+
+	@Override
+	public void visit(ArrayType b, Object obj) {
+		sb.append('a');
+		b.componentType.accept(this, obj);
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+
+	@Override
+	public void visit(BooleanType b, Object obj) {
+		sb.append('z');
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+
+	@Override
+	public void visit(DoubleType b, Object obj) {
+		sb.append('d');
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+
+	@Override
+	public void visit(FloatType b, Object obj) {
+		sb.append('f');
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+
+	@Override
+	public void visit(IntegerType b, Object obj) {
+		sb.append('i');
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+
+	@Override
+	public void visit(ByteType b, Object obj) {
+		sb.append('b');
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+
+	@Override
+	public void visit(LongType b, Object obj) {
+		sb.append('j');
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+
+	@Override
+	public void visit(OptionalType b, Object obj) {
+		sb.append('o');
+		b.componentType.accept(this, sb);
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+
+	@Override
+	public void visit(RecordType b, Object obj) {
+		if ( wasVisited(b) ) {
+			sb.append('R');
+			return;
+		}
+		if ( b.isReferable() ) {
+			sb.append('R');
+			return;
+		}
+		
+		sb.append('r');
+		for (int i=0; i<b.getComponentCount(); i++) {
+			b.getComponentType(i).accept(this, sb);
+		}
+		sb.append('e');
+
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+		for (int i=0; i<b.getComponentCount(); i++) {
+			hashcode = 13*hashcode + b.getComponent(i).name.hashCode();
+		}
+	}
+
+	@Override
+	public void visit(StringType b, Object obj) {
+		sb.append('s');
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+
+	@Override
+	public void visit(UnionType b, Object obj) {
+		if ( b.equals( Datatypes.getDatatypeUnchecked(Datatype.class) )) {
+			sb.append("t");
+			return;
+		}
+		if ( wasVisited(b) ) {
+			sb.append('U');
+			return;
+		}
+		sb.append('u');
+		for (int i=0; i<b.getComponentCount(); i++) {
+			b.getComponentType(i).accept(this, sb);
+		}
+		sb.append('e');
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+
+	@Override
+	public void visit(VariantType b, Object obj) {
+		sb.append('v');
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+
+	@Override
+	public void visit(MapType b, Object obj) {
+		if ( wasVisited(b) ) return;
+		sb.append('m');
+		b.keyType.accept(this, obj);
+		b.valueType.accept(this, obj);
+		hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
+	}
+	
+	/**
+	 * Visit and return if was visited
+	 * @param type
+	 * @return
+	 */
+	boolean wasVisited(Datatype type) {
+		Boolean result = visited.put(type, Boolean.TRUE);
+		return result == null ? false : result;
+	}
+}