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| 1 | +package com.nordstrom.common.clazz; |
| 2 | + |
| 3 | +import java.io.File; |
| 4 | +import java.io.IOException; |
| 5 | +import java.io.UncheckedIOException; |
| 6 | +import java.net.MalformedURLException; |
| 7 | +import java.net.URL; |
| 8 | +import java.net.URLClassLoader; |
| 9 | +import java.nio.file.Paths; |
| 10 | +import java.util.Arrays; |
| 11 | + |
| 12 | +/** |
| 13 | + * This class implements a custom class loader initialized with a standard class path specification. |
| 14 | + */ |
| 15 | +public class CustomClassLoader extends ClassLoader { |
| 16 | + |
| 17 | + private final URL[] pathUrls; |
| 18 | + |
| 19 | + public CustomClassLoader(String classpath) { |
| 20 | + pathUrls = Arrays.stream(classpath.split(File.pathSeparator)).map(entry -> { |
| 21 | + try { |
| 22 | + return Paths.get(entry).toUri().toURL(); |
| 23 | + } catch (MalformedURLException e) { |
| 24 | + throw new UncheckedIOException("Invalid classpath entry: " + entry, e); |
| 25 | + } |
| 26 | + }).toArray(URL[]::new); |
| 27 | + } |
| 28 | + |
| 29 | + @Override |
| 30 | + protected Class<?> findClass(String name) throws ClassNotFoundException { |
| 31 | + try (URLClassLoader classLoader = new URLClassLoader(pathUrls)) { |
| 32 | + return classLoader.loadClass(name); |
| 33 | + } catch (IOException e) { |
| 34 | + throw new ClassNotFoundException("Failed loading class: " + name, e); |
| 35 | + } |
| 36 | + } |
| 37 | +} |
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