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34 package info.magnolia.ui.field;
35
36
37 import info.magnolia.objectfactory.ComponentProvider;
38 import info.magnolia.ui.field.factory.FieldBinder;
39 import info.magnolia.ui.framework.databinding.converter.MultiItemToLinkConverter;
40 import info.magnolia.ui.framework.datasource.definition.DatasourceDefinition;
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42 import java.util.Collections;
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44 import com.vaadin.data.Binder;
45 import com.vaadin.data.Converter;
46 import com.vaadin.ui.MultiSelect;
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55 public class SelectFieldBinder<T> extends FieldBinder.Default<T> {
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57 private final SelectFieldSupport<T> selectFieldSupport;
58 private final DatasourceDefinition datasourceDefinition;
59
60 public SelectFieldBinder(ComponentProvider componentProvider, SelectFieldSupport<T> selectFieldSupport, DatasourceDefinition datasourceDefinition) {
61 super(componentProvider);
62 this.selectFieldSupport = selectFieldSupport;
63 this.datasourceDefinition = datasourceDefinition;
64 }
65
66 @Override
67 public <BT> Binder.BindingBuilder<BT, T> configureBinding(FieldDefinition<T> definition, Binder.BindingBuilder<BT, T> source) {
68 Converter converter = selectFieldSupport.itemToLinkConverter();
69 Class type = datasourceDefinition.getEntityType();
70 if (source.getField() instanceof MultiSelect) {
71 source = source.withNullRepresentation((T) Collections.emptySet());
72 converter = new MultiItemToLinkConverter(converter);
73 }
74 return super.configureBinding(definition, source.withConverter(converter));
75 }
76 }