Attachment 158998 Details for Bug 300794 – this is a helper needed by the submitted patch

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this is a helper needed by the submitted patch

NotificationHelper.java (text/x-java-source), 2.25 KB, created by thalesepm

on 2010-02-12 11:05:21 EST

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Filename:

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Creator: thalesepm

Created: 2010-02-12 11:05:21 EST

Size: 2.25 KB

patch

obsolete

>package ...
>
>import org.eclipse.emf.ecore.EObject;
>import org.eclipse.emf.ecore.EStructuralFeature;
>
>public class NotificationHelper {
>  /**
>   * Empty string constant.
>   */
>  public static final String EMPTY_STRING = ""; //$NON-NLS-1$
>
>  /**
>   * Is a notification required (something has changed)?
>   * @param object_p
>   * @param feature_p the feature.
>   * @param value_p the current text value.
>   * @return <code>true</code> means a notification has to be sent.
>   */
>  static public boolean isNotificationRequired(EObject object_p, EStructuralFeature feature_p, String value_p) {
>    boolean isNotificationRequired = false;
>    // Get the feature value.
>    Object featureValue = object_p.eGet(feature_p);
>    // If the feature value is unset, check the new value is not empty.
>    if ((null == featureValue) && !EMPTY_STRING.equals(value_p)) {
>      isNotificationRequired = true;
>    }
>    // The feature is set, compare the text value with the current feature value.
>    // A notification is required only if values are different ones.
>    if (null != featureValue) {
>      isNotificationRequired = !featureValue.equals(value_p);
>    }
>    return isNotificationRequired;
>  }
>
>  /**
>   * Is a notification required (something has changed)?
>   * @param object_p
>   * @param feature_p the feature.
>   * @param value_p the current value.
>   * @return <code>true</code> means a notification has to be sent.
>   */
>  static public boolean isNotificationRequired(EObject object_p, EStructuralFeature feature_p, Object value_p) {
>    if (value_p instanceof String) {
>      return isNotificationRequired(object_p, feature_p, (String) value_p);
>    }
>    boolean isNotificationRequired = false;
>    // Get the feature value.
>    Object featureValue = object_p.eGet(feature_p);
>    // If the feature value is unset, check the new value is not null.
>    if ((null == featureValue) && (null != value_p)) {
>      isNotificationRequired = true;
>    }
>    // The feature is set, compare the current value with the current feature value.
>    // A notification is required only if values are different ones.
>    if (null != featureValue) {
>      isNotificationRequired = !featureValue.equals(value_p);
>    }
>    return isNotificationRequired;
>  }
>}

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Attachments on bug 300794: 157601 | 157602 | 158996 | 158998