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| package photospace.beans; |
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| import java.beans.*; |
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| import java.util.*; |
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| import org.springframework.beans.*; |
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| public class Beans |
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| { |
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| public static void merge(Object from, Object to)
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| { |
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| copy(from, to, false);
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| } |
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| public static void copy(Object from, Object to)
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| { |
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| copy(from, to, true);
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| } |
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| private static void copy(Object from, Object to, boolean overwrite)
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| { |
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| BeanWrapper fromBean = new BeanWrapperImpl(from);
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| BeanWrapper toBean = new BeanWrapperImpl(to);
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| for (Iterator i = getProperties(from).iterator(); i.hasNext();)
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| { |
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| String property = (String) i.next();
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| if (!fromBean.isReadableProperty(property)) continue;
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| if (!toBean.isWritableProperty(property)) continue;
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| Object oldValue = toBean.getPropertyValue(property);
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| if (overwrite || oldValue == null || "".equals(oldValue))
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| { |
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| toBean.setPropertyValue(property, fromBean.getPropertyValue(property));
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| } |
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| } |
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| } |
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| public static Collection getProperties(Object obj)
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| { |
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| BeanWrapper bean = new BeanWrapperImpl(obj);
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| PropertyDescriptor[] properties = bean.getPropertyDescriptors();
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| List names = new ArrayList();
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| for (int i = 0; i < properties.length; i++)
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| { |
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| names.add(properties[i].getName());
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| } |
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| return names;
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| } |
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| } |
