StackOverflow2013

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14749863
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2013-02-07T11:19:18.313
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2013-02-07T11:19:18.313
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Here's a flexible but slow solution based on Spring's <a href="http://grepcode.com/file/repo1.maven.org/maven2/org.springframework/spring-beans/3.0.3.RELEASE/org/springframework/beans/BeanUtils.java#BeanUtils.copyProperties%28java.lang.Object%2Cjava.lang.Object%2Cjava.lang.String%5B%5D%29" rel="nofollow">BeanUtils class</a> <pre><code>PropertyDescriptor[] descriptors = getPropertyDescriptors(YourSourceClass.class); List<String> ignoredProperties = new ArrayList<String>(); for(PropertyDescriptor pd : descriptors){ if(pd.getReadMethod().invoke(yourSourceObject) == null){ ignoredProperties.add(pg.getBaseName()); } } BeanUtils.copyProperties(yourSourceObject, yourTargetObject, ignoredProperties.toArray()); </code></pre> It does away with writing an explicit null check, getter and setter for every field you may want to set. If you want to avoid reflection, you can shorten this construct: <pre><code>if (addressDetails.getNAME3() != null) { org.setName3(addressDetails.getNAME3()); } </code></pre> using a utility method like Guava's <a href="http://docs.guava-libraries.googlecode.com/git-history/release/javadoc/com/google/common/base/Objects.html#firstNonNull" rel="nofollow"><code>Objects.firstNonNull</code></a> <pre><code> org.setName3(Objects.firstNonNull(addressDetails.getNAME3(), org.getName3())); </code></pre> This won't help you avoid writing a line per property but it will shorten the code considerably anyway.
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