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.jet.lang.types.JetType;
023    import org.jetbrains.org.objectweb.asm.Type;
024    import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
025    import org.jetbrains.jet.codegen.ExpressionCodegen;
026    import org.jetbrains.jet.codegen.StackValue;
027    import org.jetbrains.jet.lang.psi.JetExpression;
028    
029    import java.util.List;
030    
031    import static org.jetbrains.jet.lang.resolve.java.AsmTypeConstants.getType;
032    
033    public class CopyToArray extends IntrinsicMethod {
034        @NotNull
035        @Override
036        public Type generateImpl(
037                @NotNull ExpressionCodegen codegen,
038                @NotNull InstructionAdapter v,
039                @NotNull Type returnType,
040                @Nullable PsiElement element,
041                @NotNull List<JetExpression> arguments,
042                @NotNull StackValue receiver
043        ) {
044            receiver.put(receiver.type, v);
045            v.dup();
046            v.invokeinterface("java/util/Collection", "size", "()I");
047    
048            assert element instanceof JetExpression;
049            JetType arrayType = codegen.expressionJetType((JetExpression) element);
050            assert arrayType != null;
051    
052            codegen.newArrayInstruction(arrayType);
053            v.invokeinterface("java/util/Collection", "toArray", "([Ljava/lang/Object;)[Ljava/lang/Object;");
054    
055            return getType(Object[].class);
056        }
057    }