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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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 com.motorola.studio.android.wizards.elements.sorting;
import java.text.Collator;
import java.util.Comparator;
import org.eclipse.swt.widgets.TableItem;
/**
* This class compares {@link TableItem}´s which have {@link String}s within
* them.
*/
public class TableItemStringComparator implements Comparator<TableItem>
{
/**
* Enumerator representing the sort direction for {@link TableItemStringComparator}.
*/
public enum SortDirection
{
/**
* Ascending direction
*/
ASCENDING(1),
/**
* Descending direction
*/
DESCENDING(-1);
int sortDirection = 1;
SortDirection(int sortDirection)
{
this.sortDirection = sortDirection;
}
public int getSortDirectionIntValue()
{
return sortDirection;
}
}
int columnIndex = 0;
SortDirection sortDirection = SortDirection.ASCENDING;
/**
* Instantiates a {@link Comparator} for a {@link TableItem} which
* compares {@link String}s. The index of the column to be compared
* must be entered. Moreover, the sort direction must also be provided.
*
* @param columnIndex Column index which will be compared.
* @param sortDirection Sort direction - ascending or descending
*/
public TableItemStringComparator(int columnIndex, SortDirection sortDirection)
{
// set fields
this.columnIndex = columnIndex;
this.sortDirection = sortDirection;
}
/*
* (non-Javadoc)
* @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
*/
public int compare(TableItem first, TableItem second)
{
// get table´s items
TableItem firstItem = first;
TableItem secondItem = second;
// get their determined column textx
String firstString = (firstItem.getText(columnIndex));
String secondString = (secondItem.getText(columnIndex));
// compare the strings multiplying by the "sort direction" factor, for ascending or descending purposes
return Collator.getInstance().compare(firstString, secondString)
* sortDirection.getSortDirectionIntValue();
}
}
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