gerrit.simantics Code Review - simantics/platform.git/blob

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