bundles/org.simantics.structural2/src/org/simantics/structural2/scl/AbstractCompileStructuralValueRequest.java

   1 package org.simantics.structural2.scl;
   2
   3 import java.util.Collections;
   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.PossibleIndexRoot;
  11 import org.simantics.db.common.request.ResourceRead2;
  12 import org.simantics.db.common.request.RuntimeEnvironmentRequest;
  13 import org.simantics.db.exception.DatabaseException;
  14 import org.simantics.db.layer0.scl.AbstractExpressionCompilationContext;
  15 import org.simantics.db.layer0.scl.AbstractExpressionCompilationRequest;
  16 import org.simantics.db.layer0.util.RuntimeEnvironmentRequest2;
  17 import org.simantics.layer0.Layer0;
  18 import org.simantics.scl.compiler.elaboration.expressions.EApply;
  19 import org.simantics.scl.compiler.elaboration.expressions.EConstant;
  20 import org.simantics.scl.compiler.elaboration.expressions.EVariable;
  21 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  22 import org.simantics.scl.compiler.elaboration.modules.SCLValue;
  23 import org.simantics.scl.compiler.environment.Environment;
  24 import org.simantics.scl.compiler.environment.Environments;
  25 import org.simantics.scl.compiler.runtime.RuntimeEnvironment;
  26 import org.simantics.scl.compiler.top.SCLExpressionCompilationException;
  27 import org.simantics.scl.compiler.types.Type;
  28 import org.simantics.structural2.scl.AbstractCompileStructuralValueRequest.CompilationContext;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 /**
  33  * Compiles an SCL expression that is attached to a literal
  34  * whose parent is a component that is a part of a component type.
  35  *
  36  * @author Antti Villberg
  37  */
  38 public abstract class AbstractCompileStructuralValueRequest extends AbstractExpressionCompilationRequest<CompilationContext, Object> {
  39
  40     private static final Logger LOGGER = LoggerFactory.getLogger(AbstractCompileStructuralValueRequest.class);
  41
  42     protected final Resource relation;
  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     public AbstractCompileStructuralValueRequest(Resource relation) {
  55         this.relation = relation;
  56     }
  57
  58     @Override
  59     abstract protected String getExpressionText(ReadGraph graph) throws DatabaseException;
  60
  61     /*
  62      * @throws DatabaseException is an index root could not be found
  63      */
  64     abstract protected Resource getIndexRoot(ReadGraph graph) throws DatabaseException;
  65     /*
  66      * Does not throw if the graph is valid.
  67      *
  68      * @return null if component type was not availble
  69      *
  70      */
  71     abstract protected Resource getComponentType(ReadGraph graph) throws DatabaseException;
  72
  73     protected Resource getPossibleIndexRoot(ReadGraph graph) throws DatabaseException {
  74         try {
  75             return getIndexRoot(graph);
  76         } catch (DatabaseException e) {
  77             LOGGER.error("Error while resolving index root during structural value compilation", e);
  78             return null;
  79         }
  80     }
  81
  82     @Override
  83     protected Type getExpectedType(ReadGraph graph, CompilationContext context)
  84             throws DatabaseException {
  85         Layer0 L0 = Layer0.getInstance(graph);
  86         String valueType = graph.getPossibleRelatedValue(relation, L0.RequiresValueType, Bindings.STRING);
  87         if(valueType != null) {
  88             Resource relationIndexRoot = graph.syncRequest(new PossibleIndexRoot(relation));
  89             RuntimeEnvironment relationRuntimeEnvironment = relationIndexRoot != null ? graph.syncRequest(new RuntimeEnvironmentRequest(relationIndexRoot)) : context.runtimeEnvironment;
  90             try {
  91                 return Environments.getType(relationRuntimeEnvironment.getEnvironment(), valueType);
  92             } catch (SCLExpressionCompilationException e) {
  93                 e.printStackTrace();
  94             }
  95         }
  96         return super.getExpectedType(graph, context);
  97     }
  98
  99
 100
 101     @Override
 102     protected CompilationContext getCompilationContext(ReadGraph graph)
 103             throws DatabaseException {
 104         Resource indexRoot = getIndexRoot(graph);
 105         Resource componentType = getComponentType(graph);
 106         if(componentType == null) {
 107             RuntimeEnvironment runtimeEnvironment = graph.syncRequest(new RuntimeEnvironmentRequest(indexRoot));
 108             return new CompilationContext(runtimeEnvironment, Collections.<String,ComponentTypeProperty>emptyMap());
 109         } else {
 110                 return graph.syncRequest(new ResourceRead2<CompilationContext>(componentType, indexRoot) {
 111                     @Override
 112                     public CompilationContext perform(ReadGraph graph)
 113                             throws DatabaseException {
 114                         RuntimeEnvironment runtimeEnvironment = graph.syncRequest(new RuntimeEnvironmentRequest2(resource, resource2));
 115                         Map<String, ComponentTypeProperty> propertyMap =
 116                                 graph.syncRequest(new ReadComponentTypeInterfaceRequest(resource, runtimeEnvironment.getEnvironment()),
 117                                         TransientCacheListener.<Map<String, ComponentTypeProperty>>instance());
 118                         return new CompilationContext(runtimeEnvironment, propertyMap);
 119                     }
 120                 });
 121         }
 122     }
 123
 124     @Override
 125     protected Type getContextVariableType() {
 126         return VARIABLE;
 127     }
 128
 129     protected static Expression accessInputVariable(Environment environment,
 130             org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable) {
 131         SCLValue variableParentFunction = environment.getValue(VARIABLE_PARENT);
 132         return new EApply(new EConstant(variableParentFunction),
 133                 new EApply(new EConstant(variableParentFunction),
 134                         new EVariable(contextVariable)));
 135     }
 136
 137     @Override
 138     protected Expression getVariableAccessExpression(
 139             ReadGraph graph,
 140             CompilationContext context,
 141             org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable,
 142             String name) throws DatabaseException {
 143         ComponentTypeProperty property = context.propertyMap.get(name);
 144         if(property != null) {
 145             Environment environment = context.runtimeEnvironment.getEnvironment();
 146             return getPropertyFlexible(environment,
 147                     accessInputVariable(environment, contextVariable),
 148                     name,
 149                     property.type);
 150         }
 151         else if(name.equals("input")) {
 152             Environment environment = context.runtimeEnvironment.getEnvironment();
 153             return accessInputVariable(environment, contextVariable);
 154         }
 155         else if(name.equals("self"))
 156             return new EVariable(contextVariable);
 157         else
 158             return null;
 159     }
 160
 161     @Override
 162     protected String getContextDescription(ReadGraph graph) throws DatabaseException {
 163         Resource componentType = getComponentType(graph);
 164         if(componentType != null) {
 165             String uri = graph.getPossibleURI(componentType);
 166             if(uri != null)
 167                 return uri;
 168         }
 169         // OK, no component type - report index root then
 170         Resource indexRoot = getPossibleIndexRoot(graph);
 171         if(indexRoot != null) {
 172             String uri = graph.getPossibleURI(componentType);
 173             if(uri != null)
 174                 return uri;
 175         }
 176         // OK, nothing - report default
 177         return super.getContextDescription(graph);
 178     }
 179
 180 }