| /* |
| * Copyright 2012-present Facebook, Inc. |
| * |
| * 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.facebook.buck.java; |
| |
| import com.google.common.base.Charsets; |
| import com.google.common.base.Preconditions; |
| import com.google.common.io.CharStreams; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| |
| import javax.annotation.concurrent.GuardedBy; |
| import javax.tools.JavaCompiler; |
| import javax.tools.JavaFileObject; |
| import javax.tools.SimpleJavaFileObject; |
| |
| class ZipEntryJavaFileObject extends SimpleJavaFileObject { |
| |
| private final ZipFile zipFile; |
| private final ZipEntry zipEntry; |
| |
| @GuardedBy("this") |
| private String contents; |
| |
| public ZipEntryJavaFileObject(ZipFile zipFile, ZipEntry zipEntry) { |
| super(createURIFromEntry(zipEntry), JavaFileObject.Kind.SOURCE); |
| this.zipFile = Preconditions.checkNotNull(zipFile); |
| this.zipEntry = Preconditions.checkNotNull(zipEntry); |
| } |
| |
| /** |
| * Creates a canonical URI that represents the {@link ZipEntry}. This URI starts with |
| * {@code "string:///"} because {@link JavaCompiler} does not seem to tolerate URIs that start |
| * with {@code "jar:///"}, even though that would be more appropriate. |
| */ |
| private static URI createURIFromEntry(ZipEntry entry) { |
| try { |
| return new URI("string:///" + entry.getName()); |
| } catch (URISyntaxException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| /** |
| * Returns the contents of the {@link ZipEntry} as a string. Ensures that the entry is read at |
| * most once. |
| */ |
| private synchronized String getContentsAsString() { |
| if (contents != null) { |
| return contents; |
| } |
| |
| try (InputStream inputStream = zipFile.getInputStream(zipEntry)) { |
| contents = CharStreams.toString(new InputStreamReader(inputStream, Charsets.UTF_8)); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| |
| return contents; |
| } |
| |
| @Override |
| public CharSequence getCharContent(boolean ignoreEncodingErrors) { |
| return getContentsAsString(); |
| } |
| } |