--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2011 Association for Decentralized Information Management in\r
+ * Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.databoard.binding.classfactory;\r
+\r
+import java.util.IdentityHashMap;\r
+\r
+import org.simantics.databoard.Datatypes;\r
+import org.simantics.databoard.type.ArrayType;\r
+import org.simantics.databoard.type.BooleanType;\r
+import org.simantics.databoard.type.ByteType;\r
+import org.simantics.databoard.type.Datatype;\r
+import org.simantics.databoard.type.DoubleType;\r
+import org.simantics.databoard.type.FloatType;\r
+import org.simantics.databoard.type.IntegerType;\r
+import org.simantics.databoard.type.LongType;\r
+import org.simantics.databoard.type.MapType;\r
+import org.simantics.databoard.type.OptionalType;\r
+import org.simantics.databoard.type.RecordType;\r
+import org.simantics.databoard.type.StringType;\r
+import org.simantics.databoard.type.UnionType;\r
+import org.simantics.databoard.type.VariantType;\r
+\r
+/**\r
+ * Signature Visitor builds a signature string from a datatype.\r
+ * The argument is StringBuilder.\r
+ * \r
+ * Signature is construtructed with the following notation.\r
+ * \r
+ * s StringType\r
+ * z BooleanType\r
+ * d DoubleType\r
+ * f FloatType\r
+ * i IntegerType\r
+ * b ByteType\r
+ * j LongType\r
+ * R Referable RecordType\r
+ * o* OptionalType, * denotes componentType\r
+ * a* ArrayType, * denotes componentType\r
+ * r**e RecordType, ** denotes fields\r
+ * u UnionType, * denotes components\r
+ * m** MapType, ** denotes keyType and valueType\r
+ * t Datatype\r
+ * \r
+ * For example, The signature of UUID.class is "rjje" \r
+ * \r
+ * @author toni.kalajainen\r
+ */\r
+public class SignatureVisitor implements Datatype.Visitor1 {\r
+ \r
+ public StringBuilder sb = new StringBuilder();\r
+ public int hashcode = 0xbcbcbca;\r
+ public IdentityHashMap<Datatype, Boolean> visited = new IdentityHashMap<Datatype, Boolean>();\r
+ \r
+ public static String toSignature(Datatype type)\r
+ {\r
+ SignatureVisitor sv = new SignatureVisitor();\r
+ type.accept( sv, null );\r
+ String sig = sv.sb.toString();\r
+ return sig;\r
+ } \r
+\r
+ @Override\r
+ public void visit(ArrayType b, Object obj) {\r
+ sb.append('a');\r
+ b.componentType.accept(this, obj);\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+\r
+ @Override\r
+ public void visit(BooleanType b, Object obj) {\r
+ sb.append('z');\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+\r
+ @Override\r
+ public void visit(DoubleType b, Object obj) {\r
+ sb.append('d');\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+\r
+ @Override\r
+ public void visit(FloatType b, Object obj) {\r
+ sb.append('f');\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+\r
+ @Override\r
+ public void visit(IntegerType b, Object obj) {\r
+ sb.append('i');\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+\r
+ @Override\r
+ public void visit(ByteType b, Object obj) {\r
+ sb.append('b');\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+\r
+ @Override\r
+ public void visit(LongType b, Object obj) {\r
+ sb.append('j');\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+\r
+ @Override\r
+ public void visit(OptionalType b, Object obj) {\r
+ sb.append('o');\r
+ b.componentType.accept(this, sb);\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+\r
+ @Override\r
+ public void visit(RecordType b, Object obj) {\r
+ if ( wasVisited(b) ) {\r
+ sb.append('R');\r
+ return;\r
+ }\r
+ if ( b.isReferable() ) {\r
+ sb.append('R');\r
+ return;\r
+ }\r
+ \r
+ sb.append('r');\r
+ for (int i=0; i<b.getComponentCount(); i++) {\r
+ b.getComponentType(i).accept(this, sb);\r
+ }\r
+ sb.append('e');\r
+\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ for (int i=0; i<b.getComponentCount(); i++) {\r
+ hashcode = 13*hashcode + b.getComponent(i).name.hashCode();\r
+ }\r
+ }\r
+\r
+ @Override\r
+ public void visit(StringType b, Object obj) {\r
+ sb.append('s');\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+\r
+ @Override\r
+ public void visit(UnionType b, Object obj) {\r
+ if ( b.equals( Datatypes.getDatatypeUnchecked(Datatype.class) )) {\r
+ sb.append("t");\r
+ return;\r
+ }\r
+ if ( wasVisited(b) ) {\r
+ sb.append('U');\r
+ return;\r
+ }\r
+ sb.append('u');\r
+ for (int i=0; i<b.getComponentCount(); i++) {\r
+ b.getComponentType(i).accept(this, sb);\r
+ }\r
+ sb.append('e');\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+\r
+ @Override\r
+ public void visit(VariantType b, Object obj) {\r
+ sb.append('v');\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+\r
+ @Override\r
+ public void visit(MapType b, Object obj) {\r
+ if ( wasVisited(b) ) return;\r
+ sb.append('m');\r
+ b.keyType.accept(this, obj);\r
+ b.valueType.accept(this, obj);\r
+ hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();\r
+ }\r
+ \r
+ /**\r
+ * Visit and return if was visited\r
+ * @param type\r
+ * @return\r
+ */\r
+ boolean wasVisited(Datatype type) {\r
+ Boolean result = visited.put(type, Boolean.TRUE);\r
+ return result == null ? false : result;\r
+ }\r
+}\r
Code Review / simantics / platform.git / blobdiff