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    <h2>For deep cloning (clones the entire object hierarchy):</h2> <ul> <li><p><a href="http://commons.apache.org/proper/commons-lang/javadocs/api-release/org/apache/commons/lang3/SerializationUtils.html" rel="noreferrer">commons-lang SerializationUtils</a> - using serialization - if all classes are in your control and you can force implementing <code>Serializable</code>.</p></li> <li><p><a href="https://github.com/kostaskougios/cloning/" rel="noreferrer">Java Deep Cloning Library</a> - using reflection - in cases when the classes or the objects you want to clone are out of your control (a 3rd party library) and you can't make them implement <code>Serializable</code>, or in cases you don't want to implement <code>Serializable</code>.</p></li> </ul> <h2>For shallow cloning (clones only the first level properties):</h2> <ul> <li><p><a href="https://commons.apache.org/proper/commons-beanutils/javadocs/v1.8.3/apidocs/org/apache/commons/beanutils/BeanUtils.html#cloneBean(java.lang.Object)" rel="noreferrer">commons-beanutils BeanUtils</a> - in most cases.</p></li> <li><p><a href="http://static.springsource.org/spring/docs/2.5.6/api/org/springframework/beans/BeanUtils.html" rel="noreferrer">Spring BeanUtils</a> - if you are already using spring and hence have this utility on the classpath.</p></li> </ul> <p>I deliberately omitted the "do-it-yourself" option - the API's above provide a good control over what to and what not to clone (for example using <code>transient</code>, or <code>String[] ignoreProperties</code>), so reinventing the wheel isn't preferred.</p>
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    1. COThanks Bozho, that's valuable. And I agree with you about the DIY option ! Have you ever tried the commons serialzation and/or the deep cloning lib ? What about the perfs ?
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    2. COyes, I have used all of the above options, for the above reasons :) only the cloning library had some issues when CGLIB proxies were involved, and missed some desired functionality, but I think that should be fixed now.
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    3. COHey, if my Entity is attached and I have lazy things, does SerializationUtils checks the database for the lazy properties ? Cuz this is what I want, and it doesn't !
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