1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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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.mapping.constraint.instructions;
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14 import gnu.trove.map.hash.TIntIntHashMap;
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15 import gnu.trove.set.hash.TIntHashSet;
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17 import org.simantics.db.ReadGraph;
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18 import org.simantics.db.Resource;
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19 import org.simantics.db.WriteGraph;
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20 import org.simantics.db.common.utils.NameUtils;
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21 import org.simantics.db.exception.DatabaseException;
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22 import org.simantics.mapping.IContextualModification;
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24 public class TypedBracketInstruction implements IInstruction {
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26 public static abstract class CreationInstruction {
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27 protected int variableId;
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29 public CreationInstruction(int variableId) {
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30 this.variableId = variableId;
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33 public abstract Resource create(WriteGraph g, Object[] bindings) throws DatabaseException;
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35 public void mapVariables(TIntIntHashMap map) {
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36 variableId = map.get(variableId);
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39 public void collectVariables(TIntHashSet reads, TIntHashSet writes) {
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43 IInstruction instruction;
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44 CreationInstruction[] variables;
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46 public TypedBracketInstruction(IInstruction instruction, CreationInstruction ... variables) {
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47 this.instruction = instruction;
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48 this.variables = variables;
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52 public void collectVariables(TIntHashSet reads, TIntHashSet writes) {
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53 instruction.collectVariables(reads, writes);
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54 for(CreationInstruction var : variables)
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55 var.collectVariables(reads, writes);
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58 class Claim implements IContextualModification {
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64 public void perform(WriteGraph g, Object[] bindings) throws DatabaseException {
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65 for(CreationInstruction var : variables) {
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66 bindings[var.variableId] = var.create(g, bindings);
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68 System.out.println("@ newResource " + NameUtils.getSafeName(g, (Resource)bindings[var.variableId]));
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70 instruction.doClaim(g, bindings);
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75 public IContextualModification claim(ReadGraph g, Object[] bindings) throws DatabaseException {
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76 if(instruction.query(g, bindings)==IInstruction.FAILURE)
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81 class Deny implements IContextualModification {
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82 Object continuation;
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84 public Deny(Object continuation) {
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85 this.continuation = continuation;
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89 public void perform(WriteGraph g, Object[] bindings) throws DatabaseException {
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91 for(CreationInstruction var : variables)
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92 g.deny((Resource)bindings[var.variableId]);
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93 continuation = instruction.next(g, bindings, continuation);
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94 } while(continuation != null && continuation != IInstruction.FAILURE);
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99 public IContextualModification deny(ReadGraph g, Object[] bindings) throws DatabaseException {
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100 Object continuation = instruction.query(g, bindings);
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101 if(continuation != IInstruction.FAILURE)
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102 return new Deny(continuation);
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107 public void doClaim(WriteGraph g, Object[] bindings) throws DatabaseException {
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108 if(instruction.query(g, bindings)==IInstruction.FAILURE) {
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109 for(CreationInstruction var : variables) {
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110 bindings[var.variableId] = var.create(g, bindings);
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112 System.out.println("@ newResource " + NameUtils.getSafeName(g, (Resource)bindings[var.variableId]));
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114 instruction.doClaim(g, bindings);
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119 public void doDeny(WriteGraph g, Object[] bindings) throws DatabaseException {
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120 Object continuation = instruction.query(g, bindings);
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121 if(continuation != IInstruction.FAILURE)
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123 for(CreationInstruction var : variables)
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124 g.deny((Resource)bindings[var.variableId]);
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125 continuation = instruction.next(g, bindings, continuation);
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126 } while(continuation != null && continuation != IInstruction.FAILURE);
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130 public void mapVariables(TIntIntHashMap map) {
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131 instruction.mapVariables(map);
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132 for(int i=0;i<variables.length;++i)
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133 variables[i].mapVariables(map);
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137 public Object next(ReadGraph g, Object[] bindings, Object continuation) throws DatabaseException {
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138 return instruction.next(g, bindings, continuation);
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142 public Object query(ReadGraph g, Object[] bindings) throws DatabaseException {
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143 return instruction.query(g, bindings);
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147 public void toString(StringBuilder b, int indent) {
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