1 files changed, 83 insertions, 0 deletions
diff --git a/sandbox/slaws/classloader/src/main/java/cl/CustomClassLoader.java b/sandbox/slaws/classloader/src/main/java/cl/CustomClassLoader.java
new file mode 100644
index 0000000000..050b770eab
--- /dev/null
+++ b/sandbox/slaws/classloader/src/main/java/cl/CustomClassLoader.java
@@ -0,0 +1,83 @@
+package cl;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+
+public class CustomClassLoader extends ClassLoader
+{
+	public CustomClassLoader(){
+		super(CustomClassLoader.class.getClassLoader());
+	}
+	
+	public Class loadClass( String name, boolean resolve ) 
+	   throws  ClassNotFoundException {
+		// Our goal is to get a Class object
+		Class clazz = null;
+		
+		// First, see if we've already dealt with this one
+		clazz = findLoadedClass(name);
+		
+		String fileStub = name.replace( '.', '/' );
+		String classFilename = "target/classes/" + fileStub+".class";
+		
+		try {
+			// read the bytes
+			byte raw[] = getBytes( classFilename );
+			// try to turn them into a class
+			clazz = defineClass( name, raw, 0, raw.length );
+		} catch( IOException ex ) {
+			// This is not a failure! If we reach here, it might
+			// mean that we are dealing with a class in a library,
+			// such as java.lang.Object
+		}		
+		
+		// Maybe the class is in a library -- try loading
+		// the normal way
+		if (clazz==null) {
+		    clazz = findSystemClass( name );
+		}
+		
+		// Resolve the class, if any, but only if the "resolve"
+		// flag is set to true
+		if (resolve && clazz != null) {
+		    resolveClass( clazz );
+		}
+		
+		// If we still don't have a class, it's an error
+		if (clazz == null) {
+			throw new ClassNotFoundException( name );
+		}
+		
+		return clazz;
+	}
+	
+	// Given a filename, read the entirety of that file from disk
+	// and return it as a byte array.
+	private byte[] getBytes( String filename ) throws IOException {
+		// Find out the length of the file
+		File file = new File( filename );
+		long len = file.length();
+		
+		// Create an array that's just the right size for the file's
+		// contents
+		byte raw[] = new byte[(int)len];
+		
+		// Open the file
+		FileInputStream fin = new FileInputStream( file );
+		
+		// Read all of it into the array; if we don't get all,
+		// then it's an error.
+		int r = fin.read( raw );
+		
+		if (r != len) {
+			throw new IOException( "Can't read all, "+r+" != "+len );
+		}
+		
+		// Don't forget to close the file!
+		fin.close();
+		
+		// And finally return the file contents as an array
+		return raw;
+	}	
+}