bundles/org.simantics.document.server/src/org/simantics/document/server/request/ServerSCLValueRequest.java

   1 package org.simantics.document.server.request;
   2
   3 import java.util.ArrayList;
   4 import java.util.Map;
   5
   6 import org.simantics.databoard.Bindings;
   7 import org.simantics.db.ReadGraph;
   8 import org.simantics.db.Resource;
   9 import org.simantics.db.common.procedure.adapter.TransientCacheListener;
  10 import org.simantics.db.common.request.IndexRoot;
  11 import org.simantics.db.common.request.UnaryRead;
  12 import org.simantics.db.exception.DatabaseException;
  13 import org.simantics.db.layer0.scl.AbstractExpressionCompilationContext;
  14 import org.simantics.db.layer0.scl.AbstractExpressionCompilationRequest;
  15 import org.simantics.db.layer0.util.RuntimeEnvironmentRequest2;
  16 import org.simantics.db.layer0.variable.Variable;
  17 import org.simantics.document.server.request.ServerSCLValueRequest.CompilationContext;
  18 import org.simantics.layer0.Layer0;
  19 import org.simantics.scl.compiler.common.names.Name;
  20 import org.simantics.scl.compiler.constants.StringConstant;
  21 import org.simantics.scl.compiler.elaboration.expressions.EApply;
  22 import org.simantics.scl.compiler.elaboration.expressions.EConstant;
  23 import org.simantics.scl.compiler.elaboration.expressions.ELiteral;
  24 import org.simantics.scl.compiler.elaboration.expressions.EVariable;
  25 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  26 import org.simantics.scl.compiler.elaboration.modules.SCLValue;
  27 import org.simantics.scl.compiler.environment.Environment;
  28 import org.simantics.scl.compiler.environment.Environments;
  29 import org.simantics.scl.compiler.environment.specification.EnvironmentSpecification;
  30 import org.simantics.scl.compiler.runtime.RuntimeEnvironment;
  31 import org.simantics.scl.compiler.top.SCLExpressionCompilationException;
  32 import org.simantics.scl.compiler.types.TMetaVar;
  33 import org.simantics.scl.compiler.types.TVar;
  34 import org.simantics.scl.compiler.types.Type;
  35 import org.simantics.scl.compiler.types.Types;
  36 import org.simantics.scl.compiler.types.kinds.Kinds;
  37 import org.simantics.scl.runtime.SCLContext;
  38 import org.simantics.scl.runtime.function.Function1;
  39 import org.simantics.structural2.scl.ComponentTypeProperty;
  40 import org.simantics.structural2.scl.FindPossibleComponentTypeRequest;
  41 import org.simantics.structural2.scl.ReadComponentTypeInterfaceRequest;
  42 import org.simantics.utils.datastructures.Pair;
  43 import org.slf4j.Logger;
  44 import org.slf4j.LoggerFactory;
  45
  46 public class ServerSCLValueRequest extends AbstractExpressionCompilationRequest<CompilationContext, Variable> {
  47
  48     private static final Logger LOGGER = LoggerFactory.getLogger(ServerSCLValueRequest.class);
  49
  50         private final Pair<Resource,Resource> componentTypeAndRoot;
  51         private final Resource literal;
  52     protected String possibleExpectedValueType;
  53
  54         public static class CompilationContext extends AbstractExpressionCompilationContext {
  55                 public final Map<String, ComponentTypeProperty> propertyMap;
  56
  57                 public CompilationContext(RuntimeEnvironment runtimeEnvironment,
  58                                 Map<String, ComponentTypeProperty> propertyMap) {
  59                         super(runtimeEnvironment);
  60                         this.propertyMap = propertyMap;
  61                 }
  62         }
  63
  64         private ServerSCLValueRequest(Pair<Resource,Resource> componentTypeAndRoot, Resource literal, String possibleExpectedValueType) {
  65                 assert(literal != null);
  66                 this.literal = literal;
  67                 this.componentTypeAndRoot = componentTypeAndRoot;
  68                 this.possibleExpectedValueType = possibleExpectedValueType;
  69         }
  70
  71         public ServerSCLValueRequest(ReadGraph graph, Variable context) throws DatabaseException {
  72                 this(getComponentTypeAndRoot(graph, context), context.getRepresents(graph), resolveExpectedValueType(graph, context));
  73         }
  74
  75         private static Pair<Resource,Resource> getComponentTypeAndRoot(ReadGraph graph, Variable property)  throws DatabaseException {
  76                 Variable parent = property.getParent(graph);
  77                 Resource represents = parent.getRepresents(graph);
  78                 if(represents != null) {
  79                         Resource type = graph.syncRequest(new FindPossibleComponentTypeRequest(represents));
  80                         if(type != null) {
  81                                 Resource root = graph.syncRequest(new IndexRoot(type));
  82                                 return Pair.make(type, root);
  83                         }
  84                 }
  85                 parent = parent.getParent(graph);
  86                 Resource root = graph.syncRequest(new IndexRoot(property.getRepresents(graph)));
  87                 return Pair.make(parent.getType(graph), root);
  88         }
  89
  90         public static Object compileAndEvaluate(ReadGraph graph, Variable context) throws DatabaseException {
  91                 SCLContext sclContext = SCLContext.getCurrent();
  92         Object oldGraph = sclContext.get("graph");
  93                 try {
  94                         Function1<Variable,Object> exp = graph.syncRequest(new ServerSCLValueRequest(graph, context),
  95                                         TransientCacheListener.<Function1<Variable,Object>>instance());
  96                         sclContext.put("graph", graph);
  97                         return exp.apply(context);
  98                 } catch (DatabaseException e) {
  99                         throw (DatabaseException)e;
 100                 } catch (Throwable t) {
 101                         throw new DatabaseException(t);
 102                 } finally {
 103             sclContext.put("graph", oldGraph);
 104                 }
 105         }
 106
 107         @Override
 108         protected String getExpressionText(ReadGraph graph)
 109                         throws DatabaseException {
 110                 Layer0 L0 = Layer0.getInstance(graph);
 111                 return graph.getRelatedValue(literal, L0.SCLValue_expression, Bindings.STRING);
 112         }
 113
 114         protected RuntimeEnvironmentRequest2 getRuntimeEnvironmentRequest(Resource componentType, Resource indexRoot) {
 115                 return new RuntimeEnvironmentRequest2(componentType, indexRoot) {
 116                         @Override
 117                         protected void fillEnvironmentSpecification(
 118                                         EnvironmentSpecification environmentSpecification) {
 119                         }
 120                 };
 121         }
 122
 123         @Override
 124         protected CompilationContext getCompilationContext(ReadGraph graph)
 125                         throws DatabaseException {
 126                 return graph.syncRequest(new UnaryRead<Pair<Resource,Resource>,CompilationContext>(componentTypeAndRoot) {
 127                         @Override
 128                         public CompilationContext perform(ReadGraph graph)
 129                                         throws DatabaseException {
 130                                 RuntimeEnvironment runtimeEnvironment = graph.syncRequest(getRuntimeEnvironmentRequest(parameter.first, parameter.second));
 131                                 Map<String, ComponentTypeProperty> propertyMap =
 132                                                 graph.syncRequest(new ReadComponentTypeInterfaceRequest(parameter.first, runtimeEnvironment.getEnvironment()),
 133                                                                 TransientCacheListener.<Map<String, ComponentTypeProperty>>instance());
 134                                 return new CompilationContext(runtimeEnvironment, propertyMap);
 135                         }
 136                 });
 137         }
 138
 139         @Override
 140         protected Type getContextVariableType() {
 141                 return VARIABLE;
 142         }
 143
 144         private static Expression accessInputVariable(Environment environment,
 145                         org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable) {
 146                 SCLValue variableParentFunction = environment.getValue(VARIABLE_PARENT);
 147                 return new EApply(new EConstant(variableParentFunction),
 148                                 new EApply(new EConstant(variableParentFunction),
 149                                                 new EVariable(contextVariable)));
 150         }
 151
 152     protected static Name PROPERTY_VALUE_CACHED = Name.create("Document/All", "propertyValueCached");
 153
 154     protected static Expression getProperty(Environment environment, Expression variable, String propertyName, Type type) {
 155         return new EApply(
 156                 new EConstant(environment.getValue(FROM_DYNAMIC), type),
 157                 new EApply(
 158                         new EConstant(environment.getValue(PROPERTY_VALUE_CACHED), Types.DYNAMIC),
 159                         variable,
 160                         new ELiteral(new StringConstant(propertyName))));
 161     }
 162
 163     protected static Expression getPropertyFlexible(Environment environment, Expression variable, String propertyName, Type type) {
 164         return makeTypeFlexible(environment, getProperty(environment, variable, propertyName, type), type);
 165     }
 166
 167         protected static Expression standardGetProperty(
 168                         Environment environment,
 169                         org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable,
 170                         String name,
 171                         Type type) {
 172                 return getPropertyFlexible(environment, accessInputVariable(environment, contextVariable), name, type);
 173         }
 174
 175
 176         @Override
 177         protected Expression getVariableAccessExpression(
 178                         ReadGraph graph,
 179                         CompilationContext context,
 180                         org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable,
 181                         String name) throws DatabaseException {
 182                 ComponentTypeProperty property = context.propertyMap.get(name);
 183                 if(property != null)
 184                         return standardGetProperty(
 185                                         context.runtimeEnvironment.getEnvironment(),
 186                                         contextVariable,
 187                                         name,
 188                                         property.type == null ? Types.metaVar(Kinds.STAR) : property.type);
 189                 else
 190                         return getSpecialVariableAccessExpression(graph, context, contextVariable, name);
 191         }
 192
 193         protected Expression getSpecialVariableAccessExpression(ReadGraph graph,
 194                         CompilationContext context,
 195                         org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable,
 196                         String name) throws DatabaseException {
 197                 if(name.equals("input")) {
 198                         Environment environment = context.runtimeEnvironment.getEnvironment();
 199                         return accessInputVariable(environment, contextVariable);
 200                 }
 201                 else if(name.equals("self"))
 202                         return new EVariable(contextVariable);
 203                 else
 204                         return null;
 205         }
 206
 207     @Override
 208     protected Type getExpectedType(ReadGraph graph, CompilationContext context) throws DatabaseException {
 209         if(possibleExpectedValueType != null) {
 210             try {
 211                 Type type = Environments.getType(context.runtimeEnvironment.getEnvironment(), possibleExpectedValueType);
 212                 type = Types.instantiate(Types.forAll(Types.freeVars(type).toArray(new TVar[0]), type), new ArrayList<TMetaVar>());
 213                 return type;
 214             } catch (SCLExpressionCompilationException e) {
 215                 LOGGER.error("Could not get type for " + String.valueOf(possibleExpectedValueType), e);
 216             }
 217         }
 218         return super.getExpectedType(graph, context);
 219     }
 220
 221
 222         @Override
 223         public int hashCode() {
 224                 return 31*(31*getClass().hashCode() + literal.hashCode()) + componentTypeAndRoot.hashCode();
 225         }
 226
 227         @Override
 228         public boolean equals(Object obj) {
 229                 if(this == obj)
 230                         return true;
 231                 if(obj == null || obj.getClass() != getClass())
 232                         return false;
 233                 ServerSCLValueRequest other = (ServerSCLValueRequest)obj;
 234                 return literal.equals(other.literal) && componentTypeAndRoot.equals(other.componentTypeAndRoot);
 235         }
 236 }