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- package com.vaadin.sass.util;
-
- import java.io.IOException;
- import java.io.ObjectInputStream;
- import java.io.ObjectOutputStream;
-
- /**
- * Utility for making deep copies (vs. clone()'s shallow copies) of objects.
- * Objects are first serialized and then deserialized. Error checking is fairly
- * minimal in this implementation. If an object is encountered that cannot be
- * serialized (or that references an object that cannot be serialized) an error
- * is printed to System.err and null is returned. Depending on your specific
- * application, it might make more sense to have copy(...) re-throw the
- * exception.
- */
- public class DeepCopy {
-
- /**
- * Returns a copy of the object, or null if the object cannot be serialized.
- */
- public static Object copy(Object orig) {
- Object obj = null;
- try {
- // Write the object out to a byte array
- FastByteArrayOutputStream fbos = new FastByteArrayOutputStream();
- ObjectOutputStream out = new ObjectOutputStream(fbos);
- out.writeObject(orig);
- out.flush();
- out.close();
-
- // Retrieve an input stream from the byte array and read
- // a copy of the object back in.
- ObjectInputStream in = new ObjectInputStream(fbos.getInputStream());
- obj = in.readObject();
- in.close();
- } catch (IOException e) {
- e.printStackTrace();
- } catch (ClassNotFoundException cnfe) {
- cnfe.printStackTrace();
- }
- return obj;
- }
-
- }
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