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/**
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* Copyright (C) 2017 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.vaadin.component;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.List;
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import org.apache.log4j.Logger;
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import com.vaadin.data.Property;
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import com.vaadin.data.Validator.InvalidValueException;
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import com.vaadin.data.fieldgroup.FieldGroup;
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import com.vaadin.server.FontAwesome;
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import com.vaadin.ui.AbstractField;
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import com.vaadin.ui.Button;
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import com.vaadin.ui.Component;
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import com.vaadin.ui.CssLayout;
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import com.vaadin.ui.Field;
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import com.vaadin.ui.GridLayout;
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import com.vaadin.ui.themes.ValoTheme;
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import eu.etaxonomy.vaadin.event.EditorActionType;
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import eu.etaxonomy.vaadin.event.EntityEditorActionEvent;
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import eu.etaxonomy.vaadin.event.EntityEditorActionListener;
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import eu.etaxonomy.vaadin.permission.EditPermissionTester;
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/**
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* Manages the a collection of items internally as LinkedList<V>. If the Collection to operate on is a Set a Converter must be
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* set. Internally used fields are used in un-buffered mode. The actual instances of the field type <code>F</code> to be used to
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* edit or select the entities is created by a implementation of the <code>EntityFieldInstantiator</code>,
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* see {@link #setEntityFieldInstantiator(EntityFieldInstantiator).
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*
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* @author a.kohlbecker
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* @since May 11, 2017
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*
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*/
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public class ToManyRelatedEntitiesListSelect<V extends Object, F extends AbstractField<V>> extends CompositeCustomField<List<V>> {
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private static final long serialVersionUID = 4670707714503199599L;
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private static final Logger logger = Logger.getLogger(ToManyRelatedEntitiesListSelect.class);
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protected Class<F> fieldType;
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protected Class<V> itemType;
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private FieldGroup parentFieldGroup = null;
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private Boolean valueInitiallyWasNull = null;
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protected boolean isOrderedCollection = false;
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/**
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* with a button to edit existing and to add new entities
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*/
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private boolean withEditButton = false;
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protected boolean addEmptyRowOnInitContent = true;
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private EntityFieldInstantiator<F> entityFieldInstantiator;
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private EditPermissionTester editPermissionTester;
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private EntityEditorActionListener editActionListener;
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/**
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* X index of the data field in the grid
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*/
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private static final int GRID_X_FIELD = 0;
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private int GRID_COLS = 2;
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private GridLayout grid = new GridLayout(GRID_COLS, 1);
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private boolean creatingFields;
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public ToManyRelatedEntitiesListSelect(Class<V> itemType, Class<F> fieldType, String caption){
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this.fieldType = fieldType;
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this.itemType = itemType;
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setCaption(caption);
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}
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/**
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* @param field
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* @return
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*/
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protected Integer findRow(F field) {
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Integer row = null;
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for(int r = 0; r < grid.getRows(); r++){
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if(grid.getComponent(GRID_X_FIELD, r).equals(field)){
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row = r;
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break;
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}
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}
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return row;
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}
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/**
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* @param field
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* @return
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*/
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private void addRowAfter(F field) {
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List<V> nestedValues = getValueFromNestedFields();
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if(isOrderedCollection){
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} else {
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}
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Integer row = findRow(field);
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grid.insertRow(row + 1);
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// setting null as value for new rows
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// see newFieldInstance() !!!
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addNewRow(row + 1, null);
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updateValue();
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}
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/**
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* @param field
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* @return
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*/
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private void removeRow(F field) {
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Integer row = findRow(field);
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grid.removeRow(row);
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// TODO remove from nested fields
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updateValue();
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updateButtonStates();
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}
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/**
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* @param field
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* @return
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*/
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private void moveRowDown(F field) {
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Integer row = findRow(field);
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swapRows(row);
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}
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/**
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* @param field
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* @return
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*/
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private void moveRowUp(F field) {
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Integer row = findRow(field);
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swapRows(row - 1);
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}
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/**
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* @param i
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*/
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private void swapRows(int i) {
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if(i >= 0 && i + 1 < grid.getRows()){
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grid.replaceComponent(grid.getComponent(GRID_X_FIELD, i), grid.getComponent(GRID_X_FIELD, i + 1));
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grid.replaceComponent(grid.getComponent(GRID_X_FIELD + 1 , i), grid.getComponent(GRID_X_FIELD + 1, i + 1));
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updateButtonStates();
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updateValue();
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} else {
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throw new RuntimeException("Cannot swap rows out of the grid bounds");
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}
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}
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/**
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* update Value is only called in turn of UI changes like adding, removing, swapping rows
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*/
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private void updateValue() {
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List<V> nestedValues = getValueFromNestedFields();
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List<V> beanList = getValue();
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beanList.clear();
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beanList.addAll(nestedValues);
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setInternalValue(beanList);
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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protected Component initContent() {
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grid.setColumnExpandRatio(0, 1.0f);
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// set internal value to null to add an empty row
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if(addEmptyRowOnInitContent){
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// add an empty row
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setInternalValue(null);
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}
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return grid;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public Class getType() {
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return List.class;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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protected void setInternalValue(List<V> newValue) {
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super.setInternalValue(newValue);
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if(valueInitiallyWasNull == null){
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valueInitiallyWasNull = newValue == null;
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}
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if(newValue != null){
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// newValue is already converted, need to use the original value from the data source
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boolean isListType = List.class.isAssignableFrom(getPropertyDataSource().getValue().getClass());
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// if(valueInitiallyWasNull && isOrderedCollection != isListType){
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if(valueInitiallyWasNull && isOrderedCollection != isListType){
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// need to reset the grid in this case, so that the button groups are created correctly
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clearRows();
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}
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isOrderedCollection = isListType;
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} else {
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clearRows();
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}
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if(!creatingFields){
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createFieldsForData();
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}
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}
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private void clearRows() {
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grid.removeAllComponents();
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grid.setRows(1);
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}
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private void createFieldsForData(){
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creatingFields = true;
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List<V> data = getValue();
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if(data == null || data.isEmpty()){
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data = Arrays.asList((V)null);
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}
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for(int row = 0; row < data.size(); row++){
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boolean newRowNeeded = true;
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if(grid.getRows() > row){
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Component fieldComponent = grid.getComponent(GRID_X_FIELD, row);
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if(fieldComponent != null){
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newRowNeeded = false;
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F field = (F)fieldComponent;
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if(data.get(row) != null && field.getValue() != data.get(row)){
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field.setValue(data.get(row));
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}
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}
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}
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if(newRowNeeded){
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addNewRow(row, data.get(row));
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}
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}
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creatingFields = false;
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}
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/**
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* Obtains the List of values directly from the nested fields and ignores the
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* value of the <code>propertyDataSource</code>. This is useful when the ToManyRelatedEntitiesListSelect
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* is operating on a transient field, in which case the property is considered being read only by vaadin
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* so that the commit is doing nothing.
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*
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* See also {@link AbstractCdmEditorPresenter#handleTransientProperties(DTO bean)}
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*
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* @return
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*/
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public List<V> getValueFromNestedFields() {
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List<V> nestedValues = new ArrayList<>();
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for(F f : getNestedFields()) {
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logger.trace(
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String.format("getValueFromNestedFields() - %s:%s",
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f != null ? f.getClass().getSimpleName() : "null",
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f != null && f.getValue() != null ? f.getValue() : "null"
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));
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V value = f.getValue();
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if(f != null /*&& value != null*/){
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nestedValues.add(f.getValue());
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}
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}
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return nestedValues;
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}
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/**
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* @param row the row index, starting from 0.
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* @param val
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* @return
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*/
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protected int addNewRow(int row, V val) {
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try {
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F field = newFieldInstance(val);
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field.addValueChangeListener(e -> {
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updateValue();
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fireValueChange(true);
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});
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Property ds = getPropertyDataSource();
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if(ds != null){
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Object parentVal = ds.getValue();
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}
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addStyledComponent(field);
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// important! all fields must be un-buffered
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field.setBuffered(false);
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if(getNestedFields().size() == grid.getRows()){
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grid.setRows(grid.getRows() + 1);
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}
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grid.addComponent(field, GRID_X_FIELD, row);
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grid.addComponent(buttonGroup(field), 1, row);
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updateButtonStates();
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nestFieldGroup(field);
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row++;
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} catch (InstantiationException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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} catch (IllegalAccessException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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return row;
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}
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private Component buttonGroup(F field){
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CssLayout buttonGroup = new CssLayout();
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Button add = new Button(FontAwesome.PLUS);
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add.setDescription("Add item");
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add.addClickListener(e -> addRowAfter(field));
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if(withEditButton){
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Button edit = new Button(FontAwesome.EDIT);
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edit.addClickListener(e -> editOrCreate(field));
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buttonGroup.addComponent(edit);
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addStyledComponents(edit);
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}
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Button remove = new Button(FontAwesome.MINUS);
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remove.setDescription("Remove item");
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remove.addClickListener(e -> removeRow(field));
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buttonGroup.addComponent(add);
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buttonGroup.addComponent(remove);
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addStyledComponents(add, remove);
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if(isOrderedCollection){
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Button moveUp = new Button(FontAwesome.ARROW_UP);
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moveUp.setDescription("Move up");
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moveUp.addClickListener(e -> moveRowUp(field));
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Button moveDown = new Button(FontAwesome.ARROW_DOWN);
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moveDown.addClickListener(e -> moveRowDown(field));
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moveDown.setDescription("Move down");
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buttonGroup.addComponents(moveUp, moveDown);
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addStyledComponents(moveUp, moveDown);
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}
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buttonGroup.setStyleName(ValoTheme.LAYOUT_COMPONENT_GROUP);
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return buttonGroup;
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}
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/**
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* @param e
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* @return
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*/
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private void editOrCreate(F field) {
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if(editActionListener == null){
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throw new RuntimeException("editActionListener missing");
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}
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if(field.getValue() == null){
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// create
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editActionListener.onEntityEditorActionEvent(new EntityEditorActionEvent<V>(EditorActionType.ADD, null, field));
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} else {
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// edit
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V value = field.getValue();
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editActionListener.onEntityEditorActionEvent(new EntityEditorActionEvent<V>(EditorActionType.EDIT, (Class<V>) value.getClass(), value, field));
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}
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}
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private void updateButtonStates(){
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int fieldsCount = getNestedFields().size();
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for(int row = 0; row < fieldsCount; row++){
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boolean isFirst = row == 0;
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boolean isLast = row == fieldsCount - 1;
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F field = (F) grid.getComponent(GRID_X_FIELD, row);
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CssLayout buttonGroup = (CssLayout) grid.getComponent(GRID_X_FIELD + 1, row);
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int addButtonIndex = 0;
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if(withEditButton){
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addButtonIndex++;
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// edit
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Button editCreateButton = ((Button)buttonGroup.getComponent(0));
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editCreateButton.setDescription(field.getValue() == null ? "New" : "Edit");
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editCreateButton.setEnabled(field.getValue() == null
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|| field.getValue() != null && testEditButtonPermission(field.getValue()));
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}
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// add
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buttonGroup.getComponent(addButtonIndex).setEnabled(isLast || isOrderedCollection);
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// remove
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buttonGroup.getComponent(addButtonIndex + 1).setEnabled(field.getValue() != null);
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// up
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if(isOrderedCollection && buttonGroup.getComponentCount() > addButtonIndex + 2){
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buttonGroup.getComponent(addButtonIndex + 2).setEnabled(!isFirst);
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// down
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buttonGroup.getComponent(addButtonIndex + 3).setEnabled(!isLast);
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}
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}
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}
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/**
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* @param field
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* @return
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*/
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protected boolean testEditButtonPermission(Object rowValue) {
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if(editPermissionTester != null) {
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return editPermissionTester.userHasEditPermission(rowValue);
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} else {
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return true;
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}
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}
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protected List<F> getNestedFields(){
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List<F> nestedFields = new ArrayList<>(grid.getRows());
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for(int r = 0; r < grid.getRows(); r++){
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F f = (F) grid.getComponent(GRID_X_FIELD, r);
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if(f == null){
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logger.debug(String.format("NULL field at %d,%d", GRID_X_FIELD, r));
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} else {
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nestedFields.add(f);
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}
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}
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return Collections.unmodifiableList(nestedFields);
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}
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/**
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*
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* @param val
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* @return
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* @throws InstantiationException
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* @throws IllegalAccessException
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*/
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protected F newFieldInstance(V val) throws InstantiationException, IllegalAccessException {
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F field;
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if(entityFieldInstantiator != null){
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field = entityFieldInstantiator.createNewInstance();
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} else {
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field = fieldType.newInstance();
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}
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field.setWidth(100, Unit.PERCENTAGE);
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field.setValue(val);
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476
|
// TODO
|
477
|
// when passing null as value the field must take care of creating a new
|
478
|
// instance by overriding setValue() in future we could improve this by passing a
|
479
|
// NewInstanceFactory to this class
|
480
|
return field;
|
481
|
}
|
482
|
|
483
|
/**
|
484
|
* Handle the data binding of the sub fields. Sub-fields can either be composite editor fields
|
485
|
* or 'simple' fields, usually select fields.
|
486
|
* <p>
|
487
|
* Composite editor fields allow editing the nested bean Items and must implement the
|
488
|
* {@link NestedFieldGroup} interface. Simple fields are only instantiated in
|
489
|
* {@link #newFieldInstance(Object)} where the value of the field is set. No further binding is needed
|
490
|
* for these 'simple' fields.
|
491
|
*
|
492
|
* @param field
|
493
|
*/
|
494
|
protected void nestFieldGroup(F field) {
|
495
|
if(NestedFieldGroup.class.isAssignableFrom(fieldType) && parentFieldGroup != null){
|
496
|
((NestedFieldGroup)field).registerParentFieldGroup(parentFieldGroup);
|
497
|
}
|
498
|
}
|
499
|
|
500
|
/**
|
501
|
* {@inheritDoc}
|
502
|
* <p>
|
503
|
* However, this class has no local fieldGroup but must delegate to the nested NestedFieldGroup
|
504
|
* if there are any. This happens in {@link #nestFieldGroup(AbstractField)}.
|
505
|
* <p>
|
506
|
*/
|
507
|
@Override
|
508
|
public FieldGroup getFieldGroup() {
|
509
|
return null;
|
510
|
}
|
511
|
|
512
|
/**
|
513
|
* This ToMany-CompositeCustomField has no own fields and this no local fieldGroup (see {@link #getFieldGroup()})
|
514
|
* which allow changing data. Editing of the list items is delegated to
|
515
|
* a list of sub-fields which are responsible for editing and committing the changes.
|
516
|
* Therefore the <code>parentFieldGroup</code> is only stored in a local field so that it can
|
517
|
* be passed to per item fields in {@link #nestFieldGroup}
|
518
|
*
|
519
|
* {@inheritDoc}
|
520
|
*/
|
521
|
@Override
|
522
|
public void registerParentFieldGroup(FieldGroup parent) {
|
523
|
parentFieldGroup = parent;
|
524
|
}
|
525
|
|
526
|
/**
|
527
|
* {@inheritDoc}
|
528
|
*/
|
529
|
@Override
|
530
|
public void commit() throws SourceException, InvalidValueException {
|
531
|
|
532
|
List<F> nestedFields = getNestedFields();
|
533
|
for(F f : nestedFields){
|
534
|
f.commit();
|
535
|
|
536
|
}
|
537
|
/*
|
538
|
List<V> list = (List<V>) getPropertyDataSource().getValue();
|
539
|
|
540
|
Person p = Person.NewInstance();
|
541
|
p.setTitleCache("Hacky", true);
|
542
|
list.add((V) p);
|
543
|
|
544
|
List<V> clonedList = new ArrayList<>(list);
|
545
|
list.clear();
|
546
|
for(V value : clonedList){
|
547
|
if(value != null){
|
548
|
list.add(value);
|
549
|
}
|
550
|
}
|
551
|
//
|
552
|
// calling super.commit() is useless if operating on a transient property!!
|
553
|
super.commit();
|
554
|
if(getValue().isEmpty() && valueInitiallyWasNull){
|
555
|
setPropertyDataSource(null);
|
556
|
}
|
557
|
*/
|
558
|
}
|
559
|
|
560
|
/**
|
561
|
* {@inheritDoc}
|
562
|
*/
|
563
|
@Override
|
564
|
public void setWidth(String width) {
|
565
|
super.setWidth(width);
|
566
|
grid.setWidth(width);
|
567
|
}
|
568
|
|
569
|
@Override
|
570
|
public void setWidth(float width, Unit unit){
|
571
|
super.setWidth(width, unit);
|
572
|
if(grid != null){
|
573
|
grid.setWidth(width, unit);
|
574
|
}
|
575
|
}
|
576
|
|
577
|
/**
|
578
|
* {@inheritDoc}
|
579
|
*/
|
580
|
@Override
|
581
|
protected void addDefaultStyles() {
|
582
|
// no default styles
|
583
|
}
|
584
|
|
585
|
|
586
|
/**
|
587
|
* with a button edit existing and to add new entities
|
588
|
*/
|
589
|
public void withEditButton(boolean withEditButton){
|
590
|
this.withEditButton = withEditButton;
|
591
|
}
|
592
|
|
593
|
/**
|
594
|
* {@inheritDoc}
|
595
|
*/
|
596
|
@Override
|
597
|
public boolean hasNullContent() {
|
598
|
|
599
|
for(Field f : getNestedFields()){
|
600
|
if(f instanceof CompositeCustomField){
|
601
|
if(!((CompositeCustomField)f).hasNullContent()){
|
602
|
return false;
|
603
|
}
|
604
|
}
|
605
|
}
|
606
|
return true;
|
607
|
}
|
608
|
|
609
|
/**
|
610
|
* @return the enityFieldInstantiator
|
611
|
*/
|
612
|
public EntityFieldInstantiator<F> getEntityFieldInstantiator() {
|
613
|
return entityFieldInstantiator;
|
614
|
}
|
615
|
|
616
|
/**
|
617
|
* @param enityFieldInstantiator the enityFieldInstantiator to set
|
618
|
*/
|
619
|
public void setEntityFieldInstantiator(EntityFieldInstantiator<F> entityFieldInstantiator) {
|
620
|
this.entityFieldInstantiator = entityFieldInstantiator;
|
621
|
}
|
622
|
|
623
|
/**
|
624
|
* {@inheritDoc}
|
625
|
*/
|
626
|
@Override
|
627
|
public void setReadOnly(boolean readOnly) {
|
628
|
super.setReadOnly(readOnly);
|
629
|
setDeepReadOnly(readOnly, getContent(), null);
|
630
|
updateButtonStates();
|
631
|
}
|
632
|
|
633
|
/**
|
634
|
* @return the editPermissionTester
|
635
|
*/
|
636
|
public EditPermissionTester getEditPermissionTester() {
|
637
|
return editPermissionTester;
|
638
|
}
|
639
|
|
640
|
/**
|
641
|
* @param editPermissionTester the editPermissionTester to set
|
642
|
*/
|
643
|
public void setEditPermissionTester(EditPermissionTester editPermissionTester) {
|
644
|
this.editPermissionTester = editPermissionTester;
|
645
|
}
|
646
|
|
647
|
/**
|
648
|
* @return the editActionListener
|
649
|
*/
|
650
|
public EntityEditorActionListener getEditActionListener() {
|
651
|
return editActionListener;
|
652
|
}
|
653
|
|
654
|
/**
|
655
|
* @param editActionListener the editActionListener to set
|
656
|
*/
|
657
|
public void setEditActionListener(EntityEditorActionListener editActionListener) {
|
658
|
this.editActionListener = editActionListener;
|
659
|
}
|
660
|
|
661
|
}
|