change property value according to httpsession attribute

[creatxr]

I want to change a property of a class according to a attribute of httpsession. can somebody give a example? thanks

for example:
class A {
private String x;

public void setX(String x) {
this.x = x;
}
}

a attribute named B;

if (B=='1')
set A.x to '111111'
if(B=='2')
set A.x to '2222'

can somebody give me a example?
thanks

[irbouho]

If I understood your need, you want to set an object attribute value based on a HttpSession attribute value. If the value may change on each request, you can achieve this using a javax.servlet.Filter or a org.springframework.web.servlet.HandlerInterceptor .
HTH

[creatxr]

Could you show me a example? thanks

I implements a class such as logger for hibernate.
I want to set the property "username" on runtime.
how to?

	<bean id="hibernateLoggerInterceptorImpl" class="creatxr.util.orm.hibernate.LoggerInterceptorImpl">
	</bean>

public class LoggerInterceptorImpl implements Interceptor, Serializable {
	private static final Log logger = LogFactory
			.getLog(LoggerInterceptorImpl.class);

	private final Map histories = new HashMap();

	private String username;

	public LoggerInterceptorImpl(String username) {
		super();
		this.username = username;
	}

	public LoggerInterceptorImpl() {
		super();
	}


	/* (non-Javadoc)
	 * @see net.sf.hibernate.Interceptor#onLoad(java.lang.Object, java.io.Serializable, java.lang.Object[], java.lang.String[], net.sf.hibernate.type.Type[])
	 */
	public boolean onLoad(Object entity, Serializable id, Object[] state,
			String[] propertyNames, Type[] types) throws CallbackException {
		// TODO Auto-generated method stub
		return false;
	}

	/* (non-Javadoc)
	 * @see net.sf.hibernate.Interceptor#onFlushDirty(java.lang.Object, java.io.Serializable, java.lang.Object[], java.lang.Object[], java.lang.String[], net.sf.hibernate.type.Type[])
	 */
	public boolean onFlushDirty(Object entity, Serializable id,
			Object[] currentState, Object[] previousState,
			String[] propertyNames, Type[] types) throws CallbackException {

		Map changedProps = new HashMap();
		for &#40;int i=0; i<propertyNames.length; i++&#41; &#123;
			Object newOne = currentState&#91;i&#93;;
			Object oldOne = previousState&#91;i&#93;;

			if &#40;&#40;newOne==null&#41;&&&#40;oldOne==null&#41;&#41; &#123;
				continue;
			&#125;

			if &#40;newOne instanceof PersistentCollection&#41; &#123;
//				Collections must be compared against the snapshot
				PersistentCollection collection = &#40;PersistentCollection&#41; newOne;
				if &#40;collection.isDirectlyAccessible&#40;&#41; == false&#41; &#123;
					continue;
				&#125;
//				retrieve Snapshot
				oldOne = collection.getCollectionSnapshot&#40;&#41;.getSnapshot&#40;&#41;;
				if &#40;oldOne instanceof Map && newOne instanceof Set&#41; &#123;
//				a Set is internally stored as Map
					oldOne = &#40;&#40;Map&#41; oldOne&#41;.values&#40;&#41;;
				&#125;
			&#125;

			if &#40;&#40;oldOne!=null&#41;&&&#40;oldOne.equals&#40;newOne&#41;&#41;&#41; &#123;
				continue;
			&#125;

			Map changedProp = new HashMap&#40;&#41;;
			changedProp.put&#40;"propertyName", propertyNames&#91;i&#93;&#41;;
			changedProp.put&#40;"oldValue", oldOne&#41;;
			changedProp.put&#40;"newValue", newOne&#41;;

			changedProps.put&#40;"change", changedProp&#41;;
		&#125;

		System.out.println&#40;"onFlushDirty&#40;Object, Serializable, Object&#91;&#93;, Object&#91;&#93;, String&#91;&#93;, Type&#91;&#93;&#41;"
					+ changedProps&#41;;
		return false;
	&#125;

	/* &#40;non-Javadoc&#41;
	 * @see net.sf.hibernate.Interceptor#onSave&#40;java.lang.Object, java.io.Serializable, java.lang.Object&#91;&#93;, java.lang.String&#91;&#93;, net.sf.hibernate.type.Type&#91;&#93;&#41;
	 */
	public boolean onSave&#40;Object entity, Serializable id, Object&#91;&#93; state,
			String&#91;&#93; propertyNames, Type&#91;&#93; types&#41; throws CallbackException &#123;
		// TODO Auto-generated method stub
		System.out.println&#40;"onSave&#40;Object, Serializable, Object&#91;&#93;, String&#91;&#93;, Type&#91;&#93;&#41; - hibernate logger"&#41;;

		return false;
	&#125;

	/* &#40;non-Javadoc&#41;
	 * @see net.sf.hibernate.Interceptor#onDelete&#40;java.lang.Object, java.io.Serializable, java.lang.Object&#91;&#93;, java.lang.String&#91;&#93;, net.sf.hibernate.type.Type&#91;&#93;&#41;
	 */
	public void onDelete&#40;Object entity, Serializable id, Object&#91;&#93; state,
			String&#91;&#93; propertyNames, Type&#91;&#93; types&#41; throws CallbackException &#123;
		// TODO Auto-generated method stub

	&#125;

	/* &#40;non-Javadoc&#41;
	 * @see net.sf.hibernate.Interceptor#preFlush&#40;java.util.Iterator&#41;
	 */
	public void preFlush&#40;Iterator entities&#41; throws CallbackException &#123;
		// TODO Auto-generated method stub

	&#125;

	/* &#40;non-Javadoc&#41;
	 * @see net.sf.hibernate.Interceptor#postFlush&#40;java.util.Iterator&#41;
	 */
	public void postFlush&#40;Iterator entities&#41; throws CallbackException &#123;
		// TODO Auto-generated method stub

	&#125;

	/* &#40;non-Javadoc&#41;
	 * @see net.sf.hibernate.Interceptor#isUnsaved&#40;java.lang.Object&#41;
	 */
	public Boolean isUnsaved&#40;Object entity&#41; &#123;
		// TODO Auto-generated method stub
		return null;
	&#125;

	/* &#40;non-Javadoc&#41;
	 * @see net.sf.hibernate.Interceptor#findDirty&#40;java.lang.Object, java.io.Serializable, java.lang.Object&#91;&#93;, java.lang.Object&#91;&#93;, java.lang.String&#91;&#93;, net.sf.hibernate.type.Type&#91;&#93;&#41;
	 */
	public int&#91;&#93; findDirty&#40;Object entity, Serializable id,
			Object&#91;&#93; currentState, Object&#91;&#93; previousState,
			String&#91;&#93; propertyNames, Type&#91;&#93; types&#41; &#123;
		// TODO Auto-generated method stub
		return null;
	&#125;

	/* &#40;non-Javadoc&#41;
	 * @see net.sf.hibernate.Interceptor#instantiate&#40;java.lang.Class, java.io.Serializable&#41;
	 */
	public Object instantiate&#40;Class clazz, Serializable id&#41;
			throws CallbackException &#123;
		// TODO Auto-generated method stub
		return null;
	&#125;


	public String getUsername&#40;&#41; &#123;
		return username;
	&#125;

	public void setUsername&#40;String username&#41; &#123;
		this.username = username;
	&#125;

&#125;

[ejhernand3z]

Hello creatxr,

I am in the same predicament as you are. Have you found any viable solution? Anybody in the forum has an idea how to solve this one?

Thank you all, best regards.