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 = compile(graph, context);
  95                         sclContext.put("graph", graph);
  96                         return exp.apply(context);
  97                 } catch (DatabaseException e) {
  98                         throw (DatabaseException)e;
  99                 } catch (Throwable t) {
 100                         throw new DatabaseException(t);
 101                 } finally {
 102             sclContext.put("graph", oldGraph);
 103                 }
 104         }
 105
 106         public static Function1<Variable, Object> compile(ReadGraph graph, Variable context) throws DatabaseException {
 107             return graph.syncRequest(new ServerSCLValueRequest(graph, context), TransientCacheListener.<Function1<Variable,Object>>instance());
 108         }
 109
 110         @Override
 111         protected String getExpressionText(ReadGraph graph)
 112                         throws DatabaseException {
 113                 Layer0 L0 = Layer0.getInstance(graph);
 114                 return graph.getRelatedValue(literal, L0.SCLValue_expression, Bindings.STRING);
 115         }
 116
 117         protected RuntimeEnvironmentRequest2 getRuntimeEnvironmentRequest(Resource componentType, Resource indexRoot) {
 118                 return new RuntimeEnvironmentRequest2(componentType, indexRoot) {
 119                         @Override
 120                         protected void fillEnvironmentSpecification(
 121                                         EnvironmentSpecification environmentSpecification) {
 122                         }
 123                 };
 124         }
 125
 126         @Override
 127         protected CompilationContext getCompilationContext(ReadGraph graph)
 128                         throws DatabaseException {
 129                 return graph.syncRequest(new UnaryRead<Pair<Resource,Resource>,CompilationContext>(componentTypeAndRoot) {
 130                         @Override
 131                         public CompilationContext perform(ReadGraph graph)
 132                                         throws DatabaseException {
 133                                 RuntimeEnvironment runtimeEnvironment = graph.syncRequest(getRuntimeEnvironmentRequest(parameter.first, parameter.second));
 134                                 Map<String, ComponentTypeProperty> propertyMap =
 135                                                 graph.syncRequest(new ReadComponentTypeInterfaceRequest(parameter.first, runtimeEnvironment.getEnvironment()),
 136                                                                 TransientCacheListener.<Map<String, ComponentTypeProperty>>instance());
 137                                 return new CompilationContext(runtimeEnvironment, propertyMap);
 138                         }
 139                 });
 140         }
 141
 142         @Override
 143         protected Type getContextVariableType() {
 144                 return VARIABLE;
 145         }
 146
 147         private static Expression accessInputVariable(Environment environment,
 148                         org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable) {
 149                 SCLValue variableParentFunction = environment.getValue(VARIABLE_PARENT);
 150                 return new EApply(new EConstant(variableParentFunction),
 151                                 new EApply(new EConstant(variableParentFunction),
 152                                                 new EVariable(contextVariable)));
 153         }
 154
 155     protected static Name PROPERTY_VALUE_CACHED = Name.create("Document/All", "propertyValueCached");
 156
 157     protected static Expression getProperty(Environment environment, Expression variable, String propertyName, Type type) {
 158         return new EApply(
 159                 new EConstant(environment.getValue(FROM_DYNAMIC), type),
 160                 new EApply(
 161                         new EConstant(environment.getValue(PROPERTY_VALUE_CACHED), Types.DYNAMIC),
 162                         variable,
 163                         new ELiteral(new StringConstant(propertyName))));
 164     }
 165
 166     protected static Expression getPropertyFlexible(Environment environment, Expression variable, String propertyName, Type type) {
 167         return makeTypeFlexible(environment, getProperty(environment, variable, propertyName, type), type);
 168     }
 169
 170         protected static Expression standardGetProperty(
 171                         Environment environment,
 172                         org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable,
 173                         String name,
 174                         Type type) {
 175                 return getPropertyFlexible(environment, accessInputVariable(environment, contextVariable), name, type);
 176         }
 177
 178
 179         @Override
 180         protected Expression getVariableAccessExpression(
 181                         ReadGraph graph,
 182                         CompilationContext context,
 183                         org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable,
 184                         String name) throws DatabaseException {
 185                 ComponentTypeProperty property = context.propertyMap.get(name);
 186                 if(property != null)
 187                         return standardGetProperty(
 188                                         context.runtimeEnvironment.getEnvironment(),
 189                                         contextVariable,
 190                                         name,
 191                                         property.type == null ? Types.metaVar(Kinds.STAR) : property.type);
 192                 else
 193                         return getSpecialVariableAccessExpression(graph, context, contextVariable, name);
 194         }
 195
 196         protected Expression getSpecialVariableAccessExpression(ReadGraph graph,
 197                         CompilationContext context,
 198                         org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable,
 199                         String name) throws DatabaseException {
 200                 if(name.equals("input")) {
 201                         Environment environment = context.runtimeEnvironment.getEnvironment();
 202                         return accessInputVariable(environment, contextVariable);
 203                 }
 204                 else if(name.equals("self"))
 205                         return new EVariable(contextVariable);
 206                 else
 207                         return null;
 208         }
 209
 210     @Override
 211     protected Type getExpectedType(ReadGraph graph, CompilationContext context) throws DatabaseException {
 212         if(possibleExpectedValueType != null) {
 213             try {
 214                 Type type = Environments.getType(context.runtimeEnvironment.getEnvironment(), possibleExpectedValueType);
 215                 type = Types.instantiate(Types.forAll(Types.freeVars(type).toArray(new TVar[0]), type), new ArrayList<TMetaVar>());
 216                 return type;
 217             } catch (SCLExpressionCompilationException e) {
 218                 LOGGER.error("Could not get type for " + String.valueOf(possibleExpectedValueType), e);
 219             }
 220         }
 221         return super.getExpectedType(graph, context);
 222     }
 223
 224
 225         @Override
 226         public int hashCode() {
 227                 return 31*(31*getClass().hashCode() + literal.hashCode()) + componentTypeAndRoot.hashCode();
 228         }
 229
 230         @Override
 231         public boolean equals(Object obj) {
 232                 if(this == obj)
 233                         return true;
 234                 if(obj == null || obj.getClass() != getClass())
 235                         return false;
 236                 ServerSCLValueRequest other = (ServerSCLValueRequest)obj;
 237                 return literal.equals(other.literal) && componentTypeAndRoot.equals(other.componentTypeAndRoot);
 238         }
 239 }