X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.scl.compiler%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fcompiler%2Fconstants%2Fgeneric%2FCallJava.java;fp=bundles%2Forg.simantics.scl.compiler%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fcompiler%2Fconstants%2Fgeneric%2FCallJava.java;h=300f11802ae4df144649a7d0a6f156294dc6e999;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/constants/generic/CallJava.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/constants/generic/CallJava.java
new file mode 100644
index 000000000..300f11802
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/constants/generic/CallJava.java
@@ -0,0 +1,90 @@
+package org.simantics.scl.compiler.constants.generic;
+
+import org.cojen.classfile.TypeDesc;
+import org.simantics.scl.compiler.constants.FunctionValue;
+import org.simantics.scl.compiler.internal.codegen.references.Val;
+import org.simantics.scl.compiler.internal.codegen.types.JavaReferenceValidator;
+import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilder;
+import org.simantics.scl.compiler.types.TVar;
+import org.simantics.scl.compiler.types.Type;
+
+/**
+ * This class represents a call to a Java method as an SCL function value.
+ * It is instantiated by the {@link org.simantics.scl.compiler.compilation.Elaboration.matchType(MethodRef, Type)} method. 
+ */
+public class CallJava extends FunctionValue {
+    StackItem[] stackItems;
+    MethodRef methodRef;
+    OutputFilter filter;
+    
+    public CallJava(TVar[] typeParameters, Type effect, Type returnType,
+            Type[] parameterTypes, StackItem[] stackItems, MethodRef methodRef,
+            OutputFilter filter) {
+        super(typeParameters, effect, returnType, parameterTypes);
+        this.stackItems = stackItems;
+        this.methodRef = methodRef;
+        this.filter = filter;
+    }
+
+    @Override
+    public Type applyExact(MethodBuilder mb, Val[] parameters) {
+        methodRef.invoke(mb, stackItems, parameters);
+        if(filter != null)
+            filter.filter(mb);
+        return getReturnType();
+    }
+    
+    public MethodRef getMethodRef() {
+        return methodRef;
+    }
+    
+    @Override
+    public String toString() {
+        return methodRef.getName();
+    }
+
+    public final static int INCOMPARABLE = -2;
+    public final static int LESS = -1;
+    public final static int EQUAL = 0;
+    public final static int GREATER = 1;
+    
+    public int compareTo(JavaReferenceValidator validator, CallJava other) {
+        MethodRef m1 = methodRef;
+        MethodRef m2 = other.methodRef;
+        TypeDesc[] ps1 = m1.getParameterTypes();
+        TypeDesc[] ps2 = m2.getParameterTypes();
+        if(ps1.length != ps2.length)
+            return INCOMPARABLE;
+
+        boolean lessOrEqual = true;
+        boolean greaterOrEqual = true;
+        for(int i=0;i<ps1.length;++i) {
+            if(ps1[i].equals(ps2[i]))
+                continue;
+            if(!validator.isAssignableFrom(ps1[i], ps2[i])) {
+                lessOrEqual = false;
+            }
+            if(!validator.isAssignableFrom(ps2[i], ps1[i])) {
+                greaterOrEqual = false;
+            }
+        }
+        if(lessOrEqual) {
+            if(greaterOrEqual)
+                return EQUAL;
+            else
+                return LESS;
+        }
+        else {
+            if(greaterOrEqual)
+                return GREATER;
+            else
+                return INCOMPARABLE;
+        }
+    }
+    
+    @Override
+    public void prepare(MethodBuilder mb) {
+        for(StackItem item : stackItems)
+            item.prepare(mb);
+    }
+}