X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.scl.db%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fdb%2FSCLFunctions.java;h=da88b72c063ab2bb2862156f1f39afe5058839c9;hp=77f6a6f11ee1e298c1fa104d3fa0b6ef4f97ff3b;hb=b499fdaf906ac65f88496a4e5a28a92df4a6eb6d;hpb=0ae2b770234dfc3cbb18bd38f324125cf0faca07

diff --git a/bundles/org.simantics.scl.db/src/org/simantics/scl/db/SCLFunctions.java b/bundles/org.simantics.scl.db/src/org/simantics/scl/db/SCLFunctions.java
index 77f6a6f11..da88b72c0 100644
--- a/bundles/org.simantics.scl.db/src/org/simantics/scl/db/SCLFunctions.java
+++ b/bundles/org.simantics.scl.db/src/org/simantics/scl/db/SCLFunctions.java
@@ -2,11 +2,13 @@ package org.simantics.scl.db;
 
 import java.io.IOException;
 
+import org.cojen.classfile.TypeDesc;
 import org.simantics.Simantics;
 import org.simantics.db.ReadGraph;
 import org.simantics.db.Resource;
 import org.simantics.db.VirtualGraph;
 import org.simantics.db.WriteGraph;
+import org.simantics.db.common.procedure.adapter.SyncListenerAdapter;
 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
 import org.simantics.db.common.request.BinaryRead;
 import org.simantics.db.common.request.DelayedWriteRequest;
@@ -21,9 +23,18 @@ import org.simantics.db.service.ClusterControl;
 import org.simantics.db.service.SerialisationSupport;
 import org.simantics.db.service.VirtualGraphSupport;
 import org.simantics.layer0.utils.triggers.IActivationManager;
+import org.simantics.scl.compiler.environment.specification.EnvironmentSpecification;
+import org.simantics.scl.compiler.errors.Failable;
+import org.simantics.scl.compiler.internal.codegen.types.JavaTypeTranslator;
+import org.simantics.scl.compiler.module.Module;
+import org.simantics.scl.compiler.module.repository.ImportFailureException;
+import org.simantics.scl.compiler.runtime.RuntimeEnvironment;
+import org.simantics.scl.compiler.types.Type;
+import org.simantics.scl.osgi.SCLOsgi;
 import org.simantics.scl.runtime.SCLContext;
 import org.simantics.scl.runtime.function.Function;
 import org.simantics.scl.runtime.function.Function1;
+import org.simantics.scl.runtime.tuple.Tuple;
 import org.simantics.scl.runtime.tuple.Tuple0;
 import org.simantics.utils.DataContainer;
 
@@ -263,4 +274,95 @@ public class SCLFunctions {
     	return graph.syncRequest(new SCLUnaryRead(fn, value), TransientCacheAsyncListener.<Object>instance());
     }
     
+
+    private static class Subquery implements Read<Object> {
+        Function q;
+
+        public Subquery(Function q) {
+            this.q = q;
+        }
+
+        @Override
+        public Object perform(ReadGraph graph) throws DatabaseException {
+            SCLContext sclContext = SCLContext.getCurrent();
+            Object oldGraph = sclContext.put("graph", graph);
+            try {
+                return q.apply(Tuple0.INSTANCE);
+            } catch (Throwable e) {
+                if(e instanceof DatabaseException)
+                    throw (DatabaseException)e;
+                else
+                    throw new DatabaseException(e);
+            } finally {
+                sclContext.put("graph", oldGraph);
+            }
+        }
+
+        @Override
+        public int hashCode() {
+            return q.hashCode();
+        }
+        
+        @Override
+        public boolean equals(Object obj) {
+            if(this == obj)
+                return true;
+            if(obj == null || obj.getClass() != getClass())
+                return false;
+            Subquery other = (Subquery)obj;
+            return q.equals(other.q);
+        }
+    }
+
+    public static Object subquery(ReadGraph graph, Function q) throws DatabaseException {
+        return graph.syncRequest(new Subquery(q));
+    }
+
+    public static Object subqueryC(ReadGraph graph, Function q) throws DatabaseException {
+        return graph.syncRequest(new Subquery(q), TransientCacheAsyncListener.<Object>instance());
+    }
+    
+    public static void subqueryL(ReadGraph graph, Function query, Function executeCallback, Function1<Throwable, Tuple> exceptionCallback, Function1<Tuple0, Boolean> isDisposedCallback) throws DatabaseException {
+        graph.asyncRequest(new Subquery(query), new SyncListenerAdapter<Object>() {
+            
+            @Override
+            public void execute(ReadGraph graph, Object result) {
+                executeCallback.apply(result);
+            }
+            
+            @Override
+            public void exception(ReadGraph graph, Throwable t) {
+                exceptionCallback.apply(t);
+            }
+            
+            @Override
+            public boolean isDisposed() {
+                return isDisposedCallback.apply(Tuple0.INSTANCE);
+            }
+        });
+    }
+
+    public static Object possibleFromDynamic(Type expectedType, String moduleName, Object value) {
+    	
+        try {
+
+        	
+            Failable<Module> failable = SCLOsgi.MODULE_REPOSITORY.getModule(moduleName);
+            Module module = failable.getResult();
+            
+        	RuntimeEnvironment env = SCLOsgi.MODULE_REPOSITORY.createRuntimeEnvironment(
+        			EnvironmentSpecification.of(moduleName, ""), module.getParentClassLoader());
+
+            JavaTypeTranslator tr = new JavaTypeTranslator(env.getEnvironment());
+            TypeDesc desc = tr.toTypeDesc(expectedType);
+            String className = desc.getFullName();
+            Class<?> clazz = env.getMutableClassLoader().loadClass(className);
+            if (!clazz.isAssignableFrom(value.getClass()))
+                return null;
+            
+        } catch (ImportFailureException | ClassNotFoundException e) {
+        }
+        return value;
+    }
+
 }