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.jet.codegen.ExpressionCodegen;
022    import org.jetbrains.jet.codegen.StackValue;
023    import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
024    import org.jetbrains.jet.lang.descriptors.FunctionDescriptor;
025    import org.jetbrains.jet.lang.psi.JetCallExpression;
026    import org.jetbrains.jet.lang.psi.JetExpression;
027    import org.jetbrains.jet.lang.psi.JetSimpleNameExpression;
028    import org.jetbrains.jet.lang.resolve.BindingContext;
029    import org.jetbrains.jet.lang.resolve.java.JvmPrimitiveType;
030    import org.jetbrains.jet.lang.resolve.name.FqName;
031    import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
032    import org.jetbrains.jet.lang.types.lang.PrimitiveType;
033    import org.jetbrains.org.objectweb.asm.Type;
034    import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
035    
036    import java.util.Iterator;
037    import java.util.List;
038    
039    import static org.jetbrains.jet.codegen.AsmUtil.asmDescByFqNameWithoutInnerClasses;
040    import static org.jetbrains.jet.lang.resolve.java.AsmTypeConstants.getType;
041    import static org.jetbrains.jet.lang.resolve.java.mapping.PrimitiveTypesUtil.asmTypeForPrimitive;
042    import static org.jetbrains.jet.lang.types.lang.KotlinBuiltIns.BUILT_INS_PACKAGE_FQ_NAME;
043    
044    public class ArrayIterator extends IntrinsicMethod {
045        @NotNull
046        @Override
047        public Type generateImpl(
048                @NotNull ExpressionCodegen codegen,
049                @NotNull InstructionAdapter v,
050                @NotNull Type returnType,
051                PsiElement element,
052                @NotNull List<JetExpression> arguments,
053                @NotNull StackValue receiver
054        ) {
055            receiver.put(receiver.type, v);
056            JetCallExpression call = (JetCallExpression) element;
057            FunctionDescriptor funDescriptor = (FunctionDescriptor) codegen.getBindingContext()
058                    .get(BindingContext.REFERENCE_TARGET, (JetSimpleNameExpression) call.getCalleeExpression());
059            assert funDescriptor != null;
060            ClassDescriptor containingDeclaration = (ClassDescriptor) funDescriptor.getContainingDeclaration().getOriginal();
061            if (containingDeclaration.equals(KotlinBuiltIns.getInstance().getArray())) {
062                v.invokestatic("kotlin/jvm/internal/InternalPackage", "iterator", "([Ljava/lang/Object;)Ljava/util/Iterator;", false);
063                return getType(Iterator.class);
064            }
065    
066            for (JvmPrimitiveType jvmPrimitiveType : JvmPrimitiveType.values()) {
067                PrimitiveType primitiveType = jvmPrimitiveType.getPrimitiveType();
068                ClassDescriptor arrayClass = KotlinBuiltIns.getInstance().getPrimitiveArrayClassDescriptor(primitiveType);
069                if (containingDeclaration.equals(arrayClass)) {
070                    FqName fqName = new FqName(BUILT_INS_PACKAGE_FQ_NAME + "." + primitiveType.getTypeName() + "Iterator");
071                    String iteratorDesc = asmDescByFqNameWithoutInnerClasses(fqName);
072                    String methodSignature = "([" + asmTypeForPrimitive(jvmPrimitiveType) + ")" + iteratorDesc;
073                    v.invokestatic("kotlin/jvm/internal/InternalPackage", "iterator", methodSignature, false);
074                    return Type.getType(iteratorDesc);
075                }
076            }
077    
078            throw new UnsupportedOperationException(containingDeclaration.toString());
079        }
080    }