| /* |
| * Copyright 2016 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.idea.blaze.base.projectview.section; |
| |
| import com.google.idea.blaze.base.projectview.parser.ParseContext; |
| import com.google.idea.blaze.base.projectview.parser.ProjectViewParser; |
| |
| import javax.annotation.Nullable; |
| |
| /** |
| * Parses scalar values |
| */ |
| public abstract class ScalarSectionParser<T> extends SectionParser { |
| |
| private final char divider; |
| |
| protected ScalarSectionParser(SectionKey<T, ? extends ScalarSection<T>> sectionKey, |
| char divider) { |
| super(sectionKey); |
| this.divider = divider; |
| } |
| |
| @Nullable |
| @Override |
| public final ScalarSection<T> parse(ProjectViewParser parser, ParseContext parseContext) { |
| if (parseContext.atEnd()) { |
| return null; |
| } |
| |
| String name = getName(); |
| ParseContext.Line line = parseContext.current(); |
| |
| if (!line.text.startsWith(name + divider)) { |
| return null; |
| } |
| String rest = line.text.substring(name.length() + 1).trim(); |
| parseContext.consume(); |
| T item = parseItem(parser, parseContext, rest); |
| return item != null ? new ScalarSection<T>(item) : null; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public final void print(StringBuilder sb, Section section) { |
| sb.append(getName()).append(divider); |
| if (divider != ' ') { |
| sb.append(' '); |
| } |
| printItem(sb, ((ScalarSection<T>)section).getValue()); |
| sb.append('\n'); |
| } |
| |
| /** |
| * Used by psi-parser for validation. |
| */ |
| public char getDivider() { |
| return divider; |
| } |
| |
| @Nullable |
| protected abstract T parseItem(ProjectViewParser parser, ParseContext parseContext, String rest); |
| |
| protected abstract void printItem(StringBuilder sb, T value); |
| } |