| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * 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.intellij.openapi.util.io; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.Properties; |
| import java.util.jar.Attributes; |
| import java.util.jar.JarFile; |
| import java.util.jar.Manifest; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| |
| public class JarUtil { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.util.io.JarUtil"); |
| |
| /** |
| * Returns true if the given .jar file exists and contains the given class. |
| */ |
| public static boolean containsClass(@NotNull String jarPath, @NotNull String className) { |
| return containsClass(new File(jarPath), className); |
| } |
| |
| /** |
| * Returns true if the given .jar file exists and contains the given class. |
| */ |
| public static boolean containsClass(@NotNull File file, String className) { |
| String entryPath = className.replace('.', '/') + ".class"; |
| return containsEntry(file, entryPath); |
| } |
| |
| /** |
| * Returns true if the given .jar file exists and contains the entry. |
| */ |
| public static boolean containsEntry(File file, String entryPath) { |
| if (file.canRead()) { |
| try { |
| JarFile jarFile = new JarFile(file); |
| try { |
| return jarFile.getEntry(entryPath) != null; |
| } |
| finally { |
| jarFile.close(); |
| } |
| } |
| catch (IOException ignored) { } |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Returns attribute value from a manifest main section, |
| * or null if missing or a file does not contain a manifest. |
| */ |
| @Nullable |
| public static String getJarAttribute(@NotNull File file, @NotNull Attributes.Name attribute) { |
| return getJarAttributeImpl(file, null, attribute); |
| } |
| |
| /** |
| * Returns attribute value from a given manifest section, |
| * or null if missing or a file does not contain a manifest. |
| */ |
| @Nullable |
| public static String getJarAttribute(@NotNull File file, @NotNull String entryName, @NotNull Attributes.Name attribute) { |
| return getJarAttributeImpl(file, entryName, attribute); |
| } |
| |
| private static String getJarAttributeImpl(@NotNull File file, @Nullable String entryName, @NotNull Attributes.Name attribute) { |
| if (file.canRead()) { |
| try { |
| JarFile jarFile = new JarFile(file); |
| try { |
| Manifest manifest = jarFile.getManifest(); |
| if (manifest != null) { |
| Attributes attributes = entryName != null ? manifest.getAttributes(entryName) : manifest.getMainAttributes(); |
| return attributes.getValue(attribute); |
| } |
| } |
| finally { |
| jarFile.close(); |
| } |
| } |
| catch (IOException e) { |
| LOG.debug(e); |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Loads archive entry as Java properties. |
| * Returns loaded instance, or null if requested entry is missed or invalid. |
| */ |
| @Nullable |
| public static Properties loadProperties(@NotNull File file, @NotNull String entryName) { |
| if (file.canRead()) { |
| try { |
| ZipFile zipFile = new ZipFile(file); |
| try { |
| ZipEntry entry = zipFile.getEntry(entryName); |
| if (entry != null) { |
| Properties properties = new Properties(); |
| properties.load(zipFile.getInputStream(entry)); |
| return properties; |
| } |
| } |
| finally { |
| zipFile.close(); |
| } |
| } |
| catch (IOException e) { |
| LOG.debug(e); |
| } |
| } |
| |
| return null; |
| } |
| } |