org.primefaces.model.IterableDataModel Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of primefaces Show documentation

PrimeFaces is one of the most popular UI libraries in Java EE Ecosystem and widely used by software companies, world renowned brands, banks, financial institutions, insurance companies, universities and more.

There is a newer version: 14.0.0-RC3

Show newest version

/**
 * Copyright 2009-2018 PrimeTek.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.primefaces.model;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import javax.faces.model.DataModel;
import javax.faces.model.DataModelEvent;
import javax.faces.model.DataModelListener;

public class IterableDataModel extends DataModel {

    private int index = -1;
    private Iterable wrapped;
    private List wrappedList;

    public IterableDataModel() {
        this(null);
    }

    public IterableDataModel(Iterable iterable) {
        setWrappedData(iterable);
    }

    @Override
    public int getRowCount() {
        if (wrappedList == null) {
            return -1;
        }

        return wrappedList.size();
    }

    @Override
    public E getRowData() {
        if (wrappedList == null) {
            return null;
        }
        if (!isRowAvailable()) {
            throw new IllegalArgumentException();
        }

        return wrappedList.get(index);
    }

    @Override
    public int getRowIndex() {
        return index;
    }

    @Override
    public void setRowIndex(int rowIndex) {
        if (rowIndex < -1) {
            throw new IllegalArgumentException();
        }

        int oldIndex = index;
        index = rowIndex;

        if (wrappedList == null) {
            return;
        }

        DataModelListener[] dataModelListeners = getDataModelListeners();
        if (oldIndex != index && dataModelListeners != null) {

            Object rowData = null;
            if (isRowAvailable()) {
                rowData = getRowData();
            }
            
            DataModelEvent event = new DataModelEvent(this, index, rowData);
            for (DataModelListener listener : dataModelListeners) {
                if (listener != null) {
                    listener.rowSelected(event);
                }
            }
        }
    }

    @Override
    public Object getWrappedData() {
        return wrapped;
    }

    @Override
    public void setWrappedData(Object data) {
        if (data == null) {
            wrapped = null;
            wrappedList = null;
            setRowIndex(-1);
        }
        else {
            wrapped = (Iterable) data;
            if (wrapped instanceof List) {
                wrappedList = (List) wrapped;
            }
            else if (wrapped instanceof Collection) {
                wrappedList = new ArrayList((Collection) wrapped);
            }
            else {
                wrappedList = new ArrayList();
                Iterator iterator = wrapped.iterator();
                while (iterator.hasNext()) {
                    wrappedList.add(iterator.next());
                }
            }
            setRowIndex(0);
        }
    }

    @Override
    public boolean isRowAvailable() {
        if (wrappedList == null) {
            return false;
        }
        else if (index >= 0 && index < wrappedList.size()) {
            return true;
        }

        return false;
    }
}