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.codegen.state.GenerationState;
027    import org.jetbrains.jet.lang.descriptors.CallableDescriptor;
028    import org.jetbrains.jet.lang.psi.JetCallExpression;
029    import org.jetbrains.jet.lang.psi.JetExpression;
030    import org.jetbrains.jet.lang.resolve.BindingContext;
031    import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCall;
032    import org.jetbrains.jet.lang.resolve.java.AsmTypeConstants;
033    import org.jetbrains.jet.lang.types.JetType;
034    
035    import java.util.List;
036    
037    import static org.jetbrains.jet.codegen.AsmUtil.boxType;
038    import static org.jetbrains.jet.codegen.AsmUtil.isPrimitive;
039    
040    public class JavaClassFunction implements IntrinsicMethod {
041        @Override
042        public StackValue generate(
043                ExpressionCodegen codegen, InstructionAdapter v, @NotNull Type expectedType, @Nullable PsiElement element,
044                @Nullable List<JetExpression> arguments, StackValue receiver, @NotNull GenerationState state
045        ) {
046            JetCallExpression call = (JetCallExpression) element;
047            ResolvedCall<? extends CallableDescriptor> resolvedCall =
048                    codegen.getBindingContext().get(BindingContext.RESOLVED_CALL, call.getCalleeExpression());
049            assert resolvedCall != null;
050            CallableDescriptor resultingDescriptor = resolvedCall.getResultingDescriptor();
051            JetType returnType = resultingDescriptor.getReturnType();
052            assert returnType != null;
053            Type type = state.getTypeMapper().mapType(returnType.getArguments().get(0).getType());
054            if (isPrimitive(type)) {
055                v.getstatic(boxType(type).getInternalName(), "TYPE", "Ljava/lang/Class;");
056            }
057            else {
058                v.aconst(type);
059            }
060            return StackValue.onStack(AsmTypeConstants.getType(Class.class));
061        }
062    }