Add custom columns

import com.adobe.cq.inbox.ui.column.Column;
import com.adobe.cq.inbox.ui.column.provider.ColumnProvider;

import com.adobe.cq.inbox.ui.InboxItem;
import org.osgi.service.component.annotations.Component;

import java.util.Map;

/**
 * This provider does not require any sightly template to be defined.
 * It is used to display the value of 'ismarried' workflow variable as a column in inbox
 */
@Component(service = ColumnProvider.class, immediate = true)
public class MaritalStatusProvider implements ColumnProvider {@Override
public Column getColumn() {
return new Column("married", "Married", Boolean.class.getName());
}

// Return True or False if 'ismarried' is set. Else returns null
private Boolean isMarried(InboxItem inboxItem) {
Boolean ismarried = null;

Map metaDataMap = inboxItem.getWorkflowMetadata();
if (metaDataMap != null) {
if (metaDataMap.containsKey("isMarried")) {
    ismarried = (Boolean) metaDataMap.get("isMarried");
}
}

return ismarried;
}

@Override
public Object getValue(InboxItem inboxItem) {
return isMarried(inboxItem);
}
}