com.cedarsoft.spring.rcp.renderer.DefaultLabelProvider Maven / Gradle / Ivy

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package com.cedarsoft.spring.rcp.renderer;

import org.jetbrains.annotations.NotNull;
import org.springframework.richclient.selection.binding.support.LabelProvider;

/**
 * Default label provider that handles null safely. It returns an empty string ("") for null.
 *
 * @param  the type this provider returns a label for
 */
public abstract class DefaultLabelProvider implements LabelProvider {
  @Override
  public String getLabel( Object item ) {
    if ( item == null ) {
      return getLabelForNull();
    }
    return getLabelFor( ( T ) item );
  }

  @NotNull
  protected String getLabelForNull() {
    return "";
  }

  @NotNull
  protected abstract String getLabelFor( @NotNull T item );
}