| /* |
| * 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.java.projectview; |
| |
| import com.google.idea.blaze.base.projectview.ProjectViewSet; |
| import com.google.idea.blaze.base.projectview.parser.ParseContext; |
| import com.google.idea.blaze.base.projectview.parser.ProjectViewParser; |
| import com.google.idea.blaze.base.projectview.section.ScalarSection; |
| import com.google.idea.blaze.base.projectview.section.ScalarSectionParser; |
| import com.google.idea.blaze.base.projectview.section.SectionKey; |
| import com.google.idea.blaze.base.projectview.section.SectionParser; |
| import com.intellij.pom.java.LanguageLevel; |
| import javax.annotation.Nullable; |
| |
| /** Section to force the java language level used */ |
| public class JavaLanguageLevelSection { |
| public static final SectionKey<Integer, ScalarSection<Integer>> KEY = |
| SectionKey.of("java_language_level"); |
| public static final SectionParser PARSER = new JavaLanguageLevelParser(); |
| |
| public static LanguageLevel getLanguageLevel( |
| ProjectViewSet projectViewSet, LanguageLevel defaultValue) { |
| return projectViewSet |
| .getScalarValue(KEY) |
| .map(i -> getLanguageLevel(i, defaultValue)) |
| .orElse(defaultValue); |
| } |
| |
| @Nullable |
| private static LanguageLevel getLanguageLevel( |
| Integer level, @Nullable LanguageLevel defaultValue) { |
| switch (level) { |
| case 3: |
| return LanguageLevel.JDK_1_3; |
| case 4: |
| return LanguageLevel.JDK_1_4; |
| case 5: |
| return LanguageLevel.JDK_1_5; |
| case 6: |
| return LanguageLevel.JDK_1_6; |
| case 7: |
| return LanguageLevel.JDK_1_7; |
| case 8: |
| return LanguageLevel.JDK_1_8; |
| case 9: |
| return LanguageLevel.JDK_1_9; |
| default: |
| return defaultValue; |
| } |
| } |
| |
| private static class JavaLanguageLevelParser extends ScalarSectionParser<Integer> { |
| public JavaLanguageLevelParser() { |
| super(KEY, ':'); |
| } |
| |
| @Nullable |
| @Override |
| protected Integer parseItem(ProjectViewParser parser, ParseContext parseContext, String rest) { |
| try { |
| Integer value = Integer.parseInt(rest); |
| if (getLanguageLevel(value, null) != null) { |
| return value; |
| } |
| // Fall through to error handler |
| } catch (NumberFormatException e) { |
| // Fall through to error handler |
| } |
| parseContext.addError("Illegal java language level: " + rest); |
| return null; |
| } |
| |
| @Override |
| protected void printItem(StringBuilder sb, Integer value) { |
| sb.append(value.toString()); |
| } |
| |
| @Override |
| public ItemType getItemType() { |
| return ItemType.Other; |
| } |
| } |
| } |