| // Copyright (c) 2020, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| package com.android.tools.r8.horizontalclassmerging; |
| |
| import com.android.tools.r8.graph.AccessFlags; |
| import com.android.tools.r8.graph.DexEncodedField; |
| import com.android.tools.r8.graph.DexProgramClass; |
| import com.android.tools.r8.graph.DexType; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| public class FieldMultiset { |
| |
| private static class VisibilitySignature { |
| private int publicVisible = 0; |
| private int protectedVisible = 0; |
| private int privateVisible = 0; |
| private int packagePrivateVisible = 0; |
| |
| public void addAccessModifier(AccessFlags accessFlags) { |
| if (accessFlags.isPublic()) { |
| publicVisible++; |
| } else if (accessFlags.isPrivate()) { |
| privateVisible++; |
| } else if (accessFlags.isPackagePrivate()) { |
| packagePrivateVisible++; |
| } else if (accessFlags.isProtected()) { |
| protectedVisible++; |
| } |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| VisibilitySignature that = (VisibilitySignature) o; |
| return publicVisible == that.publicVisible |
| && protectedVisible == that.protectedVisible |
| && privateVisible == that.privateVisible |
| && packagePrivateVisible == that.packagePrivateVisible; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(publicVisible, protectedVisible, privateVisible, packagePrivateVisible); |
| } |
| } |
| |
| // This *must* not be an IdentityHashMap, because hash equality does not work for the values. |
| private final Map<DexType, VisibilitySignature> fields = new HashMap<>(); |
| |
| public FieldMultiset(DexProgramClass clazz) { |
| for (DexEncodedField field : clazz.instanceFields()) { |
| fields |
| .computeIfAbsent(field.type(), ignore -> new VisibilitySignature()) |
| .addAccessModifier(field.getAccessFlags()); |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return fields.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object object) { |
| if (object instanceof FieldMultiset) { |
| FieldMultiset other = (FieldMultiset) object; |
| return fields.equals(other.fields); |
| } else { |
| return false; |
| } |
| } |
| } |