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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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.apache.tomcat.util.buf; | ||
|
|
||
| import java.io.File; | ||
| import java.net.URL; | ||
| import java.net.URLClassLoader; | ||
|
|
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| import org.apache.tomcat.util.res.StringManager; | ||
|
|
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| /** | ||
| * Utility class used to provide String representations of objects. It is typically used in debug logging. | ||
| */ | ||
| public class ToStringUtil { | ||
|
|
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| private static final StringManager sm = StringManager.getManager(ToStringUtil.class); | ||
|
|
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| private static final String INDENT = " "; | ||
|
|
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|
|
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| private ToStringUtil() { | ||
| // Utility class. Hide default constructor. | ||
| } | ||
|
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|
|
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| /** | ||
| * Generate a String representation of the class path for the given class loader and any parent class loaders to aid | ||
| * debugging of {@link ClassNotFoundException}. | ||
| * | ||
| * @param classLoader The class loader to analyse | ||
| * | ||
| * @return A String representation of the class path. The format is undefined and may change in future point | ||
| * releases. The output includes new lines. | ||
| */ | ||
| public static String classPathForCNFE(ClassLoader classLoader) { | ||
| // The result is expected to be fairly large | ||
| StringBuilder result = new StringBuilder(4096); | ||
| result.append(sm.getString("toStringUtil.classpath.header")); | ||
| result.append("\n"); | ||
| while (classLoader != null) { | ||
| classPathForCNFE(classLoader, result); | ||
| classLoader = classLoader.getParent(); | ||
| } | ||
| return result.toString(); | ||
| } | ||
|
|
||
|
|
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| private static void classPathForCNFE(ClassLoader classLoader, StringBuilder result) { | ||
| result.append(INDENT); | ||
| result.append(sm.getString("toStringUtil.classpath.classloader", classLoader)); | ||
| result.append("\n"); | ||
| if (classLoader instanceof URLClassLoader) { | ||
| URL[] urls = ((URLClassLoader) classLoader).getURLs(); | ||
| for (URL url : urls) { | ||
| result.append(INDENT); | ||
| result.append(INDENT); | ||
| result.append(url); | ||
| result.append("\n"); | ||
| } | ||
| } else if (classLoader == ClassLoader.getSystemClassLoader()) { | ||
| // From Java 9 the internal class loaders no longer extend | ||
| // URLCLassLoader | ||
| String cp = System.getProperty("java.class.path"); | ||
| if (cp != null && cp.length() > 0) { | ||
| String[] paths = cp.split(File.pathSeparator); | ||
| for (String path : paths) { | ||
| result.append(INDENT); | ||
| result.append(INDENT); | ||
| result.append(path); | ||
| result.append("\n"); | ||
| } | ||
| } | ||
| } else if (classLoader == ClassLoader.getPlatformClassLoader()) { | ||
| // From Java 9 the internal class loaders no longer extend | ||
| // URLCLassLoader | ||
| result.append(INDENT); | ||
| result.append(INDENT); | ||
| result.append(sm.getString("toStringUtil.classpath.platform")); | ||
| result.append("\n"); | ||
| } else { | ||
| result.append(INDENT); | ||
| result.append(INDENT); | ||
| result.append(sm.getString("toStringUtil.classpath.unknown")); | ||
| result.append("\n"); | ||
| } | ||
| } | ||
| } |
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