Example usage for com.vaadin.data.provider DataProvider fromCallbacks

Introduction

In this page you can find the example usage for com.vaadin.data.provider DataProvider fromCallbacks.

Prototype

public static <T> CallbackDataProvider<T, Void> fromCallbacks(FetchCallback<T, Void> fetchCallback,
        CountCallback<T, Void> countCallback) 

Source Link

Document

Creates a new data provider that uses callbacks for fetching and counting items from any backing store.

Usage

From source file:org.jpos.qi.eeuser.ConsumersHelper.java

License:Open Source License

@Override
public DataProvider getDataProvider() {
    Map<String, Boolean> orders = new HashMap<>();
    DataProvider dataProvider = DataProvider.fromCallbacks((CallbackDataProvider.FetchCallback) query -> {
        int offset = query.getOffset();
        int limit = query.getLimit();
        for (Object o : query.getSortOrders()) {
            QuerySortOrder order = (QuerySortOrder) o;
            orders.put(order.getSorted(), order.getDirection() == SortDirection.DESCENDING);
        }// w  ww.j av a2  s  .c o m
        User user = (User) query.getFilter().orElse(null);
        try {
            return getAll(offset, limit, orders, user);
        } catch (Exception e) {
            getApp().getLog().error(e);
            return null;
        }
    }, (CallbackDataProvider.CountCallback) query -> {
        User user = (User) query.getFilter().orElse(null);
        try {
            return getItemCount(user);
        } catch (Exception e) {
            getApp().getLog().error(e);
            return 0;
        }
    });
    return (ConfigurableFilterDataProvider<Consumer, Void, User>) dataProvider.withConfigurableFilter();
}

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From source file:org.jpos.qi.minigl.AccountsHelper.java

License:Open Source License

public DataProvider getParentDataProvider() {
    Map<String, Boolean> orders = new HashMap<>();
    DataProvider dataProvider = DataProvider.fromCallbacks((CallbackDataProvider.FetchCallback) query -> {
        int offset = query.getOffset();
        int limit = query.getLimit();
        Iterator it = query.getSortOrders().iterator();
        while (it.hasNext()) {
            QuerySortOrder order = (QuerySortOrder) it.next();
            orders.put(order.getSorted(), order.getDirection() == SortDirection.DESCENDING);
        }//  ww  w.ja  v a2  s . com
        try {
            return getPossibleParents(offset, limit, orders);
        } catch (Exception e) {
            getApp().getLog().error(e);
            return null;
        }
    }, (CallbackDataProvider.CountCallback<Account, Void>) query -> {
        try {
            return getPossibleParentsCount();
        } catch (Exception e) {
            getApp().getLog().error(e);
            return 0;
        }
    });
    return dataProvider;
}

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From source file:org.jpos.qi.minigl.TransactionsHelper.java

License:Open Source License

@Override
public DataProvider getDataProvider() {
    Map<String, Boolean> orders = new HashMap<>();
    DataProvider dataProvider = DataProvider.fromCallbacks((CallbackDataProvider.FetchCallback) query -> {
        int offset = query.getOffset();
        int limit = query.getLimit();
        for (Object o : query.getSortOrders()) {
            QuerySortOrder order = (QuerySortOrder) o;
            orders.put(order.getSorted(), order.getDirection() == SortDirection.DESCENDING);
        }/*  ww  w.j  a v a2s. co  m*/
        DateRange dateRange = (DateRange) query.getFilter().orElse(null);
        try {
            return getAll(offset, limit, orders, defaultJournalId, dateRange);
        } catch (Exception e) {
            getApp().getLog().error(e);
            return null;
        }
    }, (CallbackDataProvider.CountCallback) query -> {
        DateRange dateRange = (DateRange) query.getFilter().orElse(null);
        try {
            return getItemCount(defaultJournalId, dateRange);
        } catch (Exception e) {
            getApp().getLog().error(e);
            return 0;
        }
    });
    return (ConfigurableFilterDataProvider<GLTransaction, Void, DateRange>) dataProvider
            .withConfigurableFilter();
}

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From source file:org.jpos.qi.QIHelper.java

License:Open Source License

@SuppressWarnings("unchecked")
public DataProvider getDataProvider() {
    DataProvider dataProvider = DataProvider.fromCallbacks((CallbackDataProvider.FetchCallback) query -> {
        int offset = query.getOffset();
        int limit = query.getLimit();
        Iterator it = query.getSortOrders().iterator();
        Map<String, Boolean> orders = new LinkedHashMap<>();
        while (it.hasNext()) {
            QuerySortOrder order = (QuerySortOrder) it.next();
            orders.put(order.getSorted(), order.getDirection() == SortDirection.DESCENDING);
        }//from  w w  w.  j  a v  a  2 s .  c om
        try {
            return getAll(offset, limit, orders);
        } catch (Exception e) {
            getApp().getLog().error(e);
            return null;
        }
    }, (CallbackDataProvider.CountCallback) query -> {
        try {
            return getItemCount();
        } catch (Exception e) {
            getApp().getLog().error(e);
            return 0;
        }
    });
    return dataProvider;
}

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