1 /*******************************************************************************
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2 * Copyright (c) 2007, 2011 Association for Decentralized Information Management in
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.databoard.binding.classfactory;
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14 import java.util.IdentityHashMap;
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16 import org.simantics.databoard.Datatypes;
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17 import org.simantics.databoard.type.ArrayType;
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18 import org.simantics.databoard.type.BooleanType;
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19 import org.simantics.databoard.type.ByteType;
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20 import org.simantics.databoard.type.Datatype;
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21 import org.simantics.databoard.type.DoubleType;
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22 import org.simantics.databoard.type.FloatType;
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23 import org.simantics.databoard.type.IntegerType;
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24 import org.simantics.databoard.type.LongType;
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25 import org.simantics.databoard.type.MapType;
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26 import org.simantics.databoard.type.OptionalType;
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27 import org.simantics.databoard.type.RecordType;
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28 import org.simantics.databoard.type.StringType;
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29 import org.simantics.databoard.type.UnionType;
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30 import org.simantics.databoard.type.VariantType;
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33 * Signature Visitor builds a signature string from a datatype.
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34 * The argument is StringBuilder.
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36 * Signature is construtructed with the following notation.
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45 * R Referable RecordType
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46 * o* OptionalType, * denotes componentType
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47 * a* ArrayType, * denotes componentType
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48 * r**e RecordType, ** denotes fields
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49 * u UnionType, * denotes components
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50 * m** MapType, ** denotes keyType and valueType
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53 * For example, The signature of UUID.class is "rjje"
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55 * @author toni.kalajainen
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57 public class SignatureVisitor implements Datatype.Visitor1 {
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59 public StringBuilder sb = new StringBuilder();
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60 public int hashcode = 0xbcbcbca;
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61 public IdentityHashMap<Datatype, Boolean> visited = new IdentityHashMap<Datatype, Boolean>();
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63 public static String toSignature(Datatype type)
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65 SignatureVisitor sv = new SignatureVisitor();
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66 type.accept( sv, null );
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67 String sig = sv.sb.toString();
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72 public void visit(ArrayType b, Object obj) {
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74 b.componentType.accept(this, obj);
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75 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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79 public void visit(BooleanType b, Object obj) {
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81 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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85 public void visit(DoubleType b, Object obj) {
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87 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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91 public void visit(FloatType b, Object obj) {
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93 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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97 public void visit(IntegerType b, Object obj) {
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99 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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103 public void visit(ByteType b, Object obj) {
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105 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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109 public void visit(LongType b, Object obj) {
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111 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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115 public void visit(OptionalType b, Object obj) {
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117 b.componentType.accept(this, sb);
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118 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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122 public void visit(RecordType b, Object obj) {
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123 if ( wasVisited(b) ) {
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127 if ( b.isReferable() ) {
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133 for (int i=0; i<b.getComponentCount(); i++) {
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134 b.getComponentType(i).accept(this, sb);
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138 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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139 for (int i=0; i<b.getComponentCount(); i++) {
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140 hashcode = 13*hashcode + b.getComponent(i).name.hashCode();
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145 public void visit(StringType b, Object obj) {
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147 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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151 public void visit(UnionType b, Object obj) {
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152 if ( b.equals( Datatypes.getDatatypeUnchecked(Datatype.class) )) {
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156 if ( wasVisited(b) ) {
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161 for (int i=0; i<b.getComponentCount(); i++) {
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162 b.getComponentType(i).accept(this, sb);
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165 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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169 public void visit(VariantType b, Object obj) {
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171 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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175 public void visit(MapType b, Object obj) {
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176 if ( wasVisited(b) ) return;
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178 b.keyType.accept(this, obj);
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179 b.valueType.accept(this, obj);
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180 hashcode = 13*hashcode + b.getClass().getName().hashCode() + 133*b.metadataHashCode();
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184 * Visit and return if was visited
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188 boolean wasVisited(Datatype type) {
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189 Boolean result = visited.put(type, Boolean.TRUE);
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190 return result == null ? false : result;
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