Remove TomcatResources

Remove `TomcatResources` which isn't needed on master since we only
support Tomcat 8.

See gh-8532

spring-boot/src/main/java/org/springframework/boot/context/embedded/tomcat/TomcatResources.java

-/*
- * Copyright 2012-2017 the original author or authors.
- *
- * 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 org.springframework.boot.context.embedded.tomcat;
-
-import java.lang.reflect.Method;
-import java.net.MalformedURLException;
-import java.net.URL;
-import java.util.List;
-
-import javax.naming.directory.DirContext;
-
-import org.apache.catalina.Context;
-import org.apache.catalina.WebResourceRoot.ResourceSetType;
-import org.apache.catalina.core.StandardContext;
-
-import org.springframework.util.ClassUtils;
-import org.springframework.util.ReflectionUtils;
-
-/**
- * Abstraction to add resources that works with both Tomcat 8 and 7.
- *
- * @author Dave Syer
- * @author Phillip Webb
- * @author Andy Wilkinson
- */
-abstract class TomcatResources {
-
-	private final Context context;
-
-	TomcatResources(Context context) {
-		this.context = context;
-	}
-
-	void addResourceJars(List<URL> resourceJarUrls) {
-		for (URL url : resourceJarUrls) {
-			String file = url.getFile();
-			if (file.endsWith(".jar") || file.endsWith(".jar!/")) {
-				String jar = url.toString();
-				if (!jar.startsWith("jar:")) {
-					// A jar file in the file system. Convert to Jar URL.
-					jar = "jar:" + jar + "!/";
-				}
-				addJar(jar);
-			}
-			else {
-				addDir(file, url);
-			}
-		}
-	}
-
-	protected final Context getContext() {
-		return this.context;
-	}
-
-	/**
-	 * Called to add a JAR to the resources.
-	 * @param jar the URL spec for the jar
-	 */
-	protected abstract void addJar(String jar);
-
-	/**
-	 * Called to add a dir to the resource.
-	 * @param dir the dir
-	 * @param url the URL
-	 */
-	protected abstract void addDir(String dir, URL url);
-
-	/**
-	 * Return a {@link TomcatResources} instance for the currently running Tomcat version.
-	 * @param context the tomcat context
-	 * @return a {@link TomcatResources} instance.
-	 */
-	public static TomcatResources get(Context context) {
-		if (ClassUtils.isPresent("org.apache.catalina.deploy.ErrorPage", null)) {
-			return new Tomcat7Resources(context);
-		}
-		return new Tomcat8Resources(context);
-	}
-
-	/**
-	 * {@link TomcatResources} for Tomcat 7.
-	 */
-	private static class Tomcat7Resources extends TomcatResources {
-
-		private final Method addResourceJarUrlMethod;
-
-		Tomcat7Resources(Context context) {
-			super(context);
-			this.addResourceJarUrlMethod = ReflectionUtils.findMethod(context.getClass(),
-					"addResourceJarUrl", URL.class);
-		}
-
-		@Override
-		protected void addJar(String jar) {
-			URL url = getJarUrl(jar);
-			if (url != null) {
-				try {
-					this.addResourceJarUrlMethod.invoke(getContext(), url);
-				}
-				catch (Exception ex) {
-					throw new IllegalStateException(ex);
-				}
-			}
-		}
-
-		private URL getJarUrl(String jar) {
-			try {
-				return new URL(jar);
-			}
-			catch (MalformedURLException ex) {
-				// Ignore
-				return null;
-			}
-		}
-
-		@Override
-		protected void addDir(String dir, URL url) {
-			if (getContext() instanceof StandardContext) {
-				try {
-					Class<?> fileDirContextClass = Class
-							.forName("org.apache.naming.resources.FileDirContext");
-					Method setDocBaseMethod = ReflectionUtils
-							.findMethod(fileDirContextClass, "setDocBase", String.class);
-					Object fileDirContext = fileDirContextClass.newInstance();
-					setDocBaseMethod.invoke(fileDirContext, dir);
-					Method addResourcesDirContextMethod = ReflectionUtils.findMethod(
-							StandardContext.class, "addResourcesDirContext",
-							DirContext.class);
-					addResourcesDirContextMethod.invoke(getContext(), fileDirContext);
-				}
-				catch (Exception ex) {
-					throw new IllegalStateException("Tomcat 7 reflection failed", ex);
-				}
-			}
-		}
-
-	}
-
-	/**
-	 * {@link TomcatResources} for Tomcat 8.
-	 */
-	static class Tomcat8Resources extends TomcatResources {
-
-		Tomcat8Resources(Context context) {
-			super(context);
-		}
-
-		@Override
-		protected void addJar(String jar) {
-			addResourceSet(jar);
-		}
-
-		@Override
-		protected void addDir(String dir, URL url) {
-			addResourceSet(url.toString());
-		}
-
-		private void addResourceSet(String resource) {
-			try {
-				if (isInsideNestedJar(resource)) {
-					// It's a nested jar but we now don't want the suffix because Tomcat
-					// is going to try and locate it as a root URL (not the resource
-					// inside it)
-					resource = resource.substring(0, resource.length() - 2);
-				}
-				URL url = new URL(resource);
-				String path = "/META-INF/resources";
-				getContext().getResources().createWebResourceSet(
-						ResourceSetType.RESOURCE_JAR, "/", url, path);
-			}
-			catch (Exception ex) {
-				// Ignore (probably not a directory)
-			}
-		}
-
-		private boolean isInsideNestedJar(String dir) {
-			return dir.indexOf("!/") < dir.lastIndexOf("!/");
-		}
-
-	}
-
-}