Generate parts of db client query code

[simantics/platform.git] / bundles / org.simantics.db.impl / src / org / simantics / db / impl / query / CacheEntryBase.java

diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CacheEntryBase.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CacheEntryBase.java
index 4070e060d0090e96969520ce2a0dad0ab7647df0..b17c066f380b5548562985d967cff6d33f5ed378 100644 (file)
--- a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CacheEntryBase.java
+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CacheEntryBase.java
@@ -14,15 +14,17 @@ package org.simantics.db.impl.query;
 import java.util.ArrayList;
 import java.util.Iterator;
 
-import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.RelationInfo;
 import org.simantics.db.exception.DatabaseException;
 import org.simantics.db.impl.DebugPolicy;
 import org.simantics.db.impl.graph.ReadGraphImpl;
 import org.simantics.db.impl.procedure.InternalProcedure;
+import org.simantics.db.impl.query.QueryProcessor.Runner2Procedure;
+import org.simantics.db.procedure.ListenerBase;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-abstract public class CacheEntryBase extends CacheEntry {
+abstract public class CacheEntryBase<Procedure> extends CacheEntry<Procedure> {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(CacheEntryBase.class);
     
@@ -35,11 +37,11 @@ abstract public class CacheEntryBase extends CacheEntry {
        
     final public static CacheEntryBase[] NONE = new CacheEntryBase[0];
 
-       static private Object NO_RESULT = new Object();
+       static Object NO_RESULT = new Object();
        static protected Object INVALID_RESULT = new Object();
        
-       // Just created
-    static protected Object FRESH = new Object() { public String toString() { return "CREATED"; }};
+//     // Just created
+//    static protected Object FRESH = new Object() { public String toString() { return "CREATED"; }};
     // Result is computed - no exception
     static protected Object READY = new Object() { public String toString() { return "READY"; }};
     // Computation is under way
@@ -47,12 +49,12 @@ abstract public class CacheEntryBase extends CacheEntry {
     // Entry is discarded and is waiting for garbage collect
     static protected Object DISCARDED = new Object() { public String toString() { return "DISCARDED"; }};
     // The result has been invalidated
-    static protected Object REFUTED = new Object() { public String toString() { return "REFUTED"; }};
+    static protected Object REQUIRES_COMPUTATION = new Object() { public String toString() { return "REFUTED"; }};
     // The computation has excepted - the exception is in the result
     static protected Object EXCEPTED = new Object() { public String toString() { return "EXCEPTED"; }};
 
     // This indicates the status of the entry
-    public Object statusOrException = FRESH;
+    public Object statusOrException = REQUIRES_COMPUTATION;
     
     private CacheEntry p1 = null;
     private Object p2OrParents = null;
@@ -71,7 +73,7 @@ abstract public class CacheEntryBase extends CacheEntry {
     private Object result = NO_RESULT;
     
     final public boolean isFresh() {
-       return FRESH == statusOrException;
+       return REQUIRES_COMPUTATION == statusOrException;
     }
 
     public void setReady() {
@@ -97,12 +99,12 @@ abstract public class CacheEntryBase extends CacheEntry {
     @Override
     final public void refute() {
        if(DebugPolicy.QUERY_STATE) System.out.println("[QUERY STATE]: refuted " + this);
-       statusOrException = REFUTED;
+       statusOrException = REQUIRES_COMPUTATION;
     }
     
     @Override
     final public boolean isRefuted() {
-        return REFUTED == statusOrException;
+        return REQUIRES_COMPUTATION == statusOrException;
     }
 
     @Override
@@ -140,6 +142,10 @@ abstract public class CacheEntryBase extends CacheEntry {
         return PENDING == statusOrException;
     }
     
+    final public boolean requiresComputation() {
+       return REQUIRES_COMPUTATION == statusOrException;
+    }
+    
     final public boolean assertPending() {
        boolean result = isPending();
        if(!result) {
@@ -320,9 +326,9 @@ abstract public class CacheEntryBase extends CacheEntry {
     }
     
     @Override
-       final public Iterable<CacheEntry> getParents(QueryProcessor processor) {
+       final public Iterable<CacheEntry<?>> getParents(QueryProcessor processor) {
 
-               ArrayList<CacheEntry> result = new ArrayList<CacheEntry>();
+               ArrayList<CacheEntry<?>> result = new ArrayList<CacheEntry<?>>();
                if(p1 != null) result.add(p1);
                if(p2OrParents != null) {
                if(p2OrParents instanceof QueryIdentityHashSet) {
@@ -362,8 +368,7 @@ abstract public class CacheEntryBase extends CacheEntry {
        
     }
     
-    protected void fillImpliedParents(QueryProcessor processor, ArrayList<CacheEntry> result) {
-       
+    protected void fillImpliedParents(QueryProcessor processor, ArrayList<CacheEntry<?>> result) {
     }
     
     protected String internalError() {
@@ -371,7 +376,7 @@ abstract public class CacheEntryBase extends CacheEntry {
     }
 
     
-    protected boolean handleException(ReadGraphImpl graph, IntProcedure procedure) {
+    protected boolean handleException(ReadGraphImpl graph, IntProcedure procedure) throws DatabaseException {
        if(isExcepted()) {
                procedure.exception(graph, (Throwable)getResult());
                return true;
@@ -380,7 +385,7 @@ abstract public class CacheEntryBase extends CacheEntry {
        }
     }
     
-    protected boolean handleException(ReadGraphImpl graph, TripleIntProcedure procedure) {
+    protected boolean handleException(ReadGraphImpl graph, TripleIntProcedure procedure) throws DatabaseException {
        if(isExcepted()) {
                procedure.exception(graph, (Throwable)getResult());
                return true;
@@ -389,7 +394,7 @@ abstract public class CacheEntryBase extends CacheEntry {
        }
     }
 
-    protected <T> boolean handleException(ReadGraphImpl graph, InternalProcedure<T> procedure) {
+    protected <T> boolean handleException(ReadGraphImpl graph, InternalProcedure<T> procedure) throws DatabaseException {
        if(isExcepted()) {
                procedure.exception(graph, (Throwable)getResult());
                return true;
@@ -426,10 +431,6 @@ abstract public class CacheEntryBase extends CacheEntry {
                clearResult(querySupport);
     }
     
-    /*
-     * 
-     * 
-     */
     @Override
     int getGCStatus() {
        return GCStatus;
@@ -455,10 +456,10 @@ abstract public class CacheEntryBase extends CacheEntry {
        // This is the original request for all built-in queries
        return getQuery();
     }
-    
-//    abstract public void addOrSet(AsyncReadGraph graph, Object item);
-//    abstract public void except(AsyncReadGraph graph, Throwable t);
-    
-    //abstract public void perform(AsyncReadGraph graph, Object query, Object procedure);
+
+       public CacheEntryBase() {
+       }
+       
+    abstract public Object compute(ReadGraphImpl graph, Procedure procedure) throws DatabaseException;
     
 }