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