001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.jet.codegen.intrinsics;
018    
019    import com.intellij.psi.PsiElement;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.asm4.Type;
023    import org.jetbrains.asm4.commons.InstructionAdapter;
024    import org.jetbrains.jet.codegen.ExpressionCodegen;
025    import org.jetbrains.jet.codegen.StackValue;
026    import org.jetbrains.jet.lang.descriptors.CallableDescriptor;
027    import org.jetbrains.jet.lang.psi.JetCallExpression;
028    import org.jetbrains.jet.lang.psi.JetExpression;
029    import org.jetbrains.jet.lang.resolve.BindingContext;
030    import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCall;
031    import org.jetbrains.jet.lang.types.JetType;
032    
033    import java.util.List;
034    
035    import static org.jetbrains.jet.codegen.AsmUtil.boxType;
036    import static org.jetbrains.jet.codegen.AsmUtil.isPrimitive;
037    import static org.jetbrains.jet.lang.resolve.java.AsmTypeConstants.getType;
038    
039    public class JavaClassFunction extends IntrinsicMethod {
040        @NotNull
041        @Override
042        public Type generateImpl(
043                @NotNull ExpressionCodegen codegen,
044                @NotNull InstructionAdapter v,
045                @NotNull Type expectedType,
046                @Nullable PsiElement element,
047                @Nullable List<JetExpression> arguments,
048                StackValue receiver
049        ) {
050            JetCallExpression call = (JetCallExpression) element;
051            ResolvedCall<? extends CallableDescriptor> resolvedCall =
052                    codegen.getBindingContext().get(BindingContext.RESOLVED_CALL, call.getCalleeExpression());
053            assert resolvedCall != null;
054            JetType returnType = resolvedCall.getResultingDescriptor().getReturnType();
055            assert returnType != null;
056            Type type = codegen.getState().getTypeMapper().mapType(returnType.getArguments().get(0).getType());
057            if (isPrimitive(type)) {
058                v.getstatic(boxType(type).getInternalName(), "TYPE", "Ljava/lang/Class;");
059            }
060            else {
061                v.aconst(type);
062            }
063    
064            return getType(Class.class);
065        }
066    }