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
017package org.jetbrains.jet.codegen;
018
019import org.jetbrains.annotations.NotNull;
020import org.jetbrains.asm4.Type;
021import org.jetbrains.jet.codegen.state.JetTypeMapper;
022import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
023import org.jetbrains.jet.lang.descriptors.ClassKind;
024import org.jetbrains.jet.lang.resolve.DescriptorUtils;
025import org.jetbrains.jet.lang.resolve.java.JvmAbi;
026
027public class FieldInfo {
028
029    @NotNull
030    public static FieldInfo createForSingleton(@NotNull ClassDescriptor fieldClassDescriptor, @NotNull JetTypeMapper typeMapper) {
031        ClassKind kind = fieldClassDescriptor.getKind();
032        if (kind != ClassKind.OBJECT && kind != ClassKind.CLASS_OBJECT && kind != ClassKind.ENUM_ENTRY) {
033            throw new UnsupportedOperationException();
034        }
035
036        Type fieldType = typeMapper.mapType(fieldClassDescriptor.getDefaultType());
037
038        ClassDescriptor ownerDescriptor = kind == ClassKind.OBJECT
039                                          ? fieldClassDescriptor: DescriptorUtils.getParentOfType(fieldClassDescriptor, ClassDescriptor.class);
040        assert ownerDescriptor != null;
041        Type ownerType = typeMapper.mapType(ownerDescriptor.getDefaultType());
042
043        String fieldName = kind == ClassKind.ENUM_ENTRY
044                           ? fieldClassDescriptor.getName().asString()
045                           : fieldClassDescriptor.getKind() == ClassKind.CLASS_OBJECT ? JvmAbi.CLASS_OBJECT_FIELD : JvmAbi.INSTANCE_FIELD;
046        return new FieldInfo(ownerType, fieldType, fieldName, true);
047    }
048
049
050    public static FieldInfo createForHiddenField(@NotNull Type owner, Type fieldType, String fieldName) {
051        return new FieldInfo(owner, fieldType, fieldName, false);
052    }
053
054    private final Type fieldType;
055
056    private final Type ownerType;
057
058    private final String fieldName;
059
060    private final boolean isStatic;
061
062    private FieldInfo(@NotNull Type ownerType, @NotNull Type fieldType, @NotNull String fieldName, @NotNull boolean isStatic) {
063        this.ownerType = ownerType;
064        this.fieldType = fieldType;
065        this.fieldName = fieldName;
066        this.isStatic = isStatic;
067    }
068
069    @NotNull
070    public Type getFieldType() {
071        return fieldType;
072    }
073
074    @NotNull
075    public Type getOwnerType() {
076        return ownerType;
077    }
078
079    @NotNull
080    public String getOwnerInternalName() {
081        return ownerType.getInternalName();
082    }
083
084    @NotNull
085    public String getFieldName() {
086        return fieldName;
087    }
088
089    @NotNull
090    public boolean isStatic() {
091        return isStatic;
092    }
093}