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/*
* Copyright 2016 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.turbine.model;
/** The visibility of a declaration. */
public enum TurbineVisibility {
PUBLIC(3, TurbineFlag.ACC_PUBLIC),
PROTECTED(2, TurbineFlag.ACC_PROTECTED),
PACKAGE(1, 0),
PRIVATE(0, TurbineFlag.ACC_PRIVATE);
private final int level;
private final int flag;
TurbineVisibility(int level, int flag) {
this.level = level;
this.flag = flag;
}
public boolean moreVisible(TurbineVisibility other) {
return level > other.level;
}
public int flag() {
return flag;
}
public static final int VISIBILITY_MASK =
TurbineFlag.ACC_PUBLIC | TurbineFlag.ACC_PRIVATE | TurbineFlag.ACC_PROTECTED;
/**
* Returns the {@link TurbineVisibility} corresponding to the given access bits.
*
* <p>If the input is ill-formed and corresponds to multiple visibilities, {@code PUBLIC}, {@code
* PROTECTED}, {@code PRIVATE}, and {@code PACKAGE}, are returned in that order. This means that
* turbine will occasionally produce valid output for invalid input. In general turbine performs
* the minimum possible error-checking, and the expectation is that it is run in parallel with
* javac or another non-header compiler as part of a build, and it defers well-formedness checking
* to the other tool.
*/
public static TurbineVisibility fromAccess(int access) {
if ((access & TurbineFlag.ACC_PUBLIC) == TurbineFlag.ACC_PUBLIC) {
return PUBLIC;
}
if ((access & TurbineFlag.ACC_PROTECTED) == TurbineFlag.ACC_PROTECTED) {
return PROTECTED;
}
if ((access & TurbineFlag.ACC_PRIVATE) == TurbineFlag.ACC_PRIVATE) {
return PRIVATE;
}
return PACKAGE;
}
public int setAccess(int access) {
access &= ~(TurbineFlag.ACC_PUBLIC | TurbineFlag.ACC_PRIVATE | TurbineFlag.ACC_PROTECTED);
access |= flag();
return access;
}
}
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