| // Copyright 2014 The Bazel Authors. 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.devtools.build.lib.syntax; |
| |
| import com.google.devtools.build.lib.cmdline.Label; |
| import java.io.Serializable; |
| import java.util.Objects; |
| import javax.annotation.Nullable; |
| |
| /** |
| * Encapsulates the two syntactic variants of Starlark imports: absolute labels and relative labels. |
| */ |
| public abstract class SkylarkImport implements Serializable { |
| private final String importString; |
| |
| protected SkylarkImport(String importString) { |
| this.importString = importString; |
| } |
| |
| /** Returns the string originally used to specify the import (represents a label). */ |
| public String getImportString() { |
| return importString; |
| } |
| |
| /** |
| * Given a {@link Label} representing the file that contains this import, returns a {@link Label} |
| * representing the .bzl file to be imported. |
| * |
| * @throws IllegalStateException if this import takes the form of an absolute path. |
| */ |
| public abstract Label getLabel(@Nullable Label containingFileLabel); |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(getClass(), importString); |
| } |
| |
| @Override |
| public boolean equals(Object that) { |
| if (this == that) { |
| return true; |
| } |
| |
| if (!(that instanceof SkylarkImport)) { |
| return false; |
| } |
| |
| return (that instanceof SkylarkImport) |
| && Objects.equals(importString, ((SkylarkImport) that).importString); |
| } |
| } |