/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2011, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.swing.dialog;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import javax.swing.AbstractListModel;
import org.geotools.referencing.ReferencingFactoryFinder;
import org.opengis.referencing.crs.CRSAuthorityFactory;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
/**
* List model class for {@code JCRSChooser}. Supports filtering
* by case-insensitive sub-string matching.
*
* @author Michael Bedward
* @since 8.0
*
* @source $URL$
* @version $Id$
*/
public class CRSListModel extends AbstractListModel {
private static class Item {
String code;
String desc;
Item(String code, String desc) {
this.code = code;
this.desc = desc;
}
@Override
public String toString() {
return code + ": " + desc;
}
}
private List<Item> allItems = new ArrayList<Item>();
private List<Item> filterItems = new ArrayList<Item>();
/**
* Constructor. Populates the model with available reference systems
* for the specified authority. If {@code authority} is {@code null}
* or empty, it defaults to {@link JCRSChooser#DEFAULT_AUTHORITY}.
*
* @param authority the authority name
* @param showDefaults show GeoTools default reference systems
*/
public CRSListModel(String authority) {
try {
CRSAuthorityFactory fac =
ReferencingFactoryFinder.getCRSAuthorityFactory(authority, null);
Set<String> codes = fac.getAuthorityCodes(CoordinateReferenceSystem.class);
if (authority == null || authority.trim().length() == 0) {
authority = JCRSChooser.DEFAULT_AUTHORITY;
}
for (String code : codes) {
code = code.trim();
String desc = fac.getDescriptionText(authority + ":" + code).toString();
allItems.add(new Item(code, desc));
}
filterItems.addAll(allItems);
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
/**
* {@inheritDoc}
*
* @return the length of the list with the current filter applied
*/
@Override
public int getSize() {
return filterItems.size();
}
/**
* {@inheritDoc}
*
* @return a {@code String} of the form {@code reference code: description}
*/
@Override
public String getElementAt(int i) {
return filterItems.get(i).toString();
}
/**
* Filters the model items by searching for the given sub-string.
* Case is ignored for matching.
*
* @param subStr sub-string to filter on; or {@code null} or
* empty string for no filtering
*/
public void setFilter(String subStr) {
filterItems.clear();
if (subStr == null || subStr.trim().length() == 0) {
filterItems.addAll(allItems);
} else {
String lo = subStr.toLowerCase();
for (Item item : allItems) {
if (item.code.toLowerCase().contains(lo) || item.desc.toLowerCase().contains(lo)) {
filterItems.add(item);
}
}
}
fireContentsChanged(this, 0, getSize());
}
/**
* Gets the code for the given element index.
*
* @param i the index
* @return the code
*/
public String getCodeAt(int i) {
return filterItems.get(i).code;
}
/**
* Searches for the element with the given code. The search
* is undertaken on the filtered items.
*
* @param code the code to match; may be {@code null} or empty in which
* case -1 is returned
*
* @return index of the matching element or -1 if not found.
*/
public int findCode(String code) {
String searchCode = code == null ? null : code.trim();
if (searchCode != null && searchCode.length() > 0) {
for (int i = 0; i < filterItems.size(); i++) {
if (filterItems.get(i).code.equalsIgnoreCase(code)) {
return i;
}
}
}
return -1;
}
}