Develop Reference

Embedding MySQL in java desktop with mysql/connector/mxj

I'm using Embedding MySQL database in my desktop application and using MySQL/connector/MXJ (I know that has been discontinued by Mysql guys).
It's a good way to start MySQL in windows platform without causing errors.
My question is how can I set Server Options using my.ini (MySQL/bin/my.ini)? For example, I add innodb_force_recovery = 6 into my.ini but when I use getServerOptions() I get
innodb-force-recovery 0
Is there any other why to set server options ?
Thanks

I fix the problem by including connector/MXJ source code directly into my project, after that I mark some change on MysqldResource.java
String[] constructArgs(Map mysqldArgs) {
List strs = new ArrayList();
strs.add(utils.files().getPath(getMysqldFilePointer()));
//The magic happens here
strs.add("--defaults-file=mysql\\my.ini");
if (isWindows()) {
strs.add("--console");
}
Iterator it = mysqldArgs.entrySet().iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String key = (String) entry.getKey();
String value = (String) entry.getValue();
StringBuffer buf = new StringBuffer("--");
buf.append(key);
if (value != null) {
buf.append("=");
buf.append(value);
}
strs.add(buf.toString());
}
return utils.str().toStringArray(strs);
}

Trouble building Shapefile in Geotools

I have a project where I want to load in a given shapefile, and pick out polygons above a certain size before writing the results to a new shapefile. Maybe not the most efficient, but I've got code that successfully does all of that, right up to the point where it is supposed to write the shapefile. I get no errors, but the resulting shapefile has no usable data in it. I've followed as many tutorials as possible, but still I'm coming up blank.
The first bit of code is where I read in a shapefile, pickout the polygons I want, and put then into a feature collection. This part seems to work fine as far as I can tell.
public class ShapefileTest {
public static void main(String[] args) throws MalformedURLException, IOException, FactoryException, MismatchedDimensionException, TransformException, SchemaException {
File oldShp = new File("Old.shp");
File newShp = new File("New.shp");
//Get data from the original ShapeFile
Map<String, Object> map = new HashMap<String, Object>();
map.put("url", oldShp.toURI().toURL());
//Connect to the dataStore
DataStore dataStore = DataStoreFinder.getDataStore(map);
//Get the typeName from the dataStore
String typeName = dataStore.getTypeNames()[0];
//Get the FeatureSource from the dataStore
FeatureSource<SimpleFeatureType, SimpleFeature> source = dataStore.getFeatureSource(typeName);
SimpleFeatureCollection collection = (SimpleFeatureCollection) source.getFeatures(); //Get all of the features - no filter
//Start creating the new Shapefile
final SimpleFeatureType TYPE = createFeatureType(); //Calls a method that builds the feature type - tested and works.
DefaultFeatureCollection newCollection = new DefaultFeatureCollection(); //To hold my new collection
try (FeatureIterator<SimpleFeature> features = collection.features()) {
while (features.hasNext()) {
SimpleFeature feature = features.next(); //Get next feature
SimpleFeatureBuilder fb = new SimpleFeatureBuilder(TYPE); //Create a new SimpleFeature based on the original
Integer level = (Integer) feature.getAttribute(1); //Get the level for this feature
MultiPolygon multiPoly = (MultiPolygon) feature.getDefaultGeometry(); //Get the geometry collection
//First count how many new polygons we will have
int numNewPoly = 0;
for (int i = 0; i < multiPoly.getNumGeometries(); i++) {
double area = getArea(multiPoly.getGeometryN(i));
if (area > 20200) {
numNewPoly++;
}
}
//Now build an array of the larger polygons
Polygon[] polys = new Polygon[numNewPoly]; //Array of new geometies
int iPoly = 0;
for (int i = 0; i < multiPoly.getNumGeometries(); i++) {
double area = getArea(multiPoly.getGeometryN(i));
if (area > 20200) { //Write the new data
polys[iPoly] = (Polygon) multiPoly.getGeometryN(i);
iPoly++;
}
}
GeometryFactory gf = new GeometryFactory(); //Create a geometry factory
MultiPolygon mp = new MultiPolygon(polys, gf); //Create the MultiPolygonyy
fb.add(mp); //Add the geometry collection to the feature builder
fb.add(level);
fb.add("dBA");
SimpleFeature newFeature = SimpleFeatureBuilder.build( TYPE, new Object[]{mp, level,"dBA"}, null );
newCollection.add(newFeature); //Add it to the collection
}
At this point I have a collection that looks right - it has the correct bounds and everything. The next bit if code is where I put it into a new Shapefile.
//Time to put together the new Shapefile
Map<String, Serializable> newMap = new HashMap<String, Serializable>();
newMap.put("url", newShp.toURI().toURL());
newMap.put("create spatial index", Boolean.TRUE);
DataStore newDataStore = DataStoreFinder.getDataStore(newMap);
newDataStore.createSchema(TYPE);
String newTypeName = newDataStore.getTypeNames()[0];
SimpleFeatureStore fs = (SimpleFeatureStore) newDataStore.getFeatureSource(newTypeName);
Transaction t = new DefaultTransaction("add");
fs.setTransaction(t);
fs.addFeatures(newCollection);
t.commit();
ReferencedEnvelope env = fs.getBounds();
}
}
I put in the very last code to check the bounds of the FeatureStore fs, and it comes back null. Obviously, loading the newly created shapefile (which DOES get created and is ab out the right size), nothing shows up.

The solution actually had nothing to do with the code I posted - it had everything to do with my FeatureType definition. I did not include the "the_geom" to my polygon feature type, so nothing was getting written to the file.

I believe you are missing the step to finalize/close the file. Try adding this after the the t.commit line.
fs.close();
As an expedient alternative, you might try out the Shapefile dumper utility mentioned in the Shapefile DataStores docs. Using that may simplify your second code block into two or three lines.

put/add is replacing all entires in a map or list

I am trying to convert a map: Map<String, Map<String, Map<String, Map<String, String>>>>to a Map<String, Settings>.
The Settings class contains all the possible map keys and will be set to true when looping through this particular key.
The problem is when in the deepest map, when adding to a global Map<String, Settings>, the Settings will be replaved with the last Settings for every entry.
Can someone help me find out where i do wrong?
public void loop(Map map, Settings settings){
List keys = new ArrayList(map.keySet());
if(map.get(keys.get(0)) instanceof Map){
//is a map, so continue loop + add to vorm
for(int i = 0; i < keys.size(); i++){
Settings tmp = settings;
String field = keys.get(i).toString();
Method method = null;
try {
//Set some booleans for key
method = tmp.getClass().getMethod(field, boolean.class);
method.invoke(tmp, true);
loop((Map) map.get(keys.get(i).toString()), tmp);
} catch (Exception e) {
e.printStackTrace();
}
}else{
for(int i = 0; i < keys.size(); i++) {
Settings tmp = settings;
String key = keys.get(i).toString();
String word = map.get(key).toString();
tmp.setWord(word);
Settings input = tmp;
settingsList.add(convert, input);//put into 2 arraylists
keyList.add(convert, woord);
convert++;
//vormen.put(word, tmp);//put into list
}
}
}
This method is called here:
public void convert(){
vormen = new HashMap();
settingsList = new ArrayList<>();
wordList = new ArrayList<>();
if(jsonMap.isEmpty()){
throw new NullPointerException("You are trying to convert a null map");
}else {
loop(jsonMap, new Settings());
}
}
Not every variable might be correctly named, i just renamed them.
Thanks for you help
EDIT: fixed, the temporary Settings that was put into the arrays was somehow being changed every time, acting like a pointer or something. I made a new Settings just before adding, and set the settings of tmp to that one. It works now.

Open Office 1.1.4 Export to PDF with background images using java

I have a problem that needs solving where we use OpenOffice 1.1.4 templated reports and programmatically export them to PDF.
The team who create the templates have recently changed the header image and some images in a table to background images (before they were just inserted) since this change the current program is not creating the PDFs with the images. We can export from OpenOffice manually and the images are included. Can anyone help with a change I may need to make to get these background images included please?
The current code:
private void print(XInterface xComponent,
PrintRequestDTO printReq, File sourceFile,
Vector<String> pages) throws java.lang.Exception {
String pageRange;
// XXX create the PDF via OOo export facility
com.sun.star.frame.XStorable pdfCreator = (com.sun.star.frame.XStorable) UnoRuntime
.queryInterface(
com.sun.star.frame.XStorable.class,
xComponent);
PropertyValue[] outputOpts = new PropertyValue[2];
outputOpts[0] = new PropertyValue();
outputOpts[0].Name = "CompressionMode";
outputOpts[0].Value = "1"; // XXX Change this perhaps?
outputOpts[1] = new PropertyValue();
outputOpts[1].Name = "PageRange";
if (printReq.getPageRange() == null) {
pageRange = "1-";
}
else {
if (printReq.getPageRange().length() > 0) {
pageRange = printReq.getPageRange();
}
else {
pageRange = "1-";
}
}
log.debug("Print Instruction - page range = "
+ pageRange);
PropertyValue[] filterOpts = new PropertyValue[3];
filterOpts[0] = new PropertyValue();
filterOpts[0].Name = "FilterName";
filterOpts[0].Value = "writer_pdf_Export"; // MS Word 97
filterOpts[1] = new PropertyValue();
filterOpts[1].Name = "Overwrite";
filterOpts[1].Value = new Boolean(true);
filterOpts[2] = new PropertyValue();
filterOpts[2].Name = "FilterData";
filterOpts[2].Value = outputOpts;
if (pages.size() == 0) { // ie no forced page breaks
// set page range
outputOpts[1].Value = pageRange;
filterOpts[2] = new PropertyValue();
filterOpts[2].Name = "FilterData";
filterOpts[2].Value = outputOpts;
File outputFile = new File(
sourceFile.getParent(),
printReq.getOutputFileName()
+ ".pdf");
StringBuffer sPDFUrl = new StringBuffer(
"file:///");
sPDFUrl.append(outputFile.getCanonicalPath()
.replace('\\', '/'));
log.debug("PDF file = " + sPDFUrl.toString());
if (pdfCreator != null) {
sleep();
pdfCreator.storeToURL(sPDFUrl.toString(),
filterOpts);
}
}
else if (pages.size() > 1) {
throw new PrintDocumentException(
"Only one forced split catered for currently");
}
else { // a forced split exists.
log.debug("Page break found in "
+ (String) pages.firstElement());
String[] newPageRanges = calculatePageRanges(
(String) pages.firstElement(), pageRange);
int rangeCount = newPageRanges.length;
for (int i = 0; i < rangeCount; i++) {
outputOpts[1].Value = newPageRanges[i];
log.debug("page range = " + newPageRanges[i]);
filterOpts[2] = new PropertyValue();
filterOpts[2].Name = "FilterData";
filterOpts[2].Value = outputOpts;
String fileExtension = (i == 0 && rangeCount > 1) ? "__Summary.pdf"
: ".pdf";
File outputFile = new File(
sourceFile.getParent(),
printReq.getOutputFileName()
+ fileExtension);
StringBuffer sPDFUrl = new StringBuffer(
"file:///");
sPDFUrl.append(outputFile.getCanonicalPath()
.replace('\\', '/'));
log.debug("PDF file = " + sPDFUrl.toString());
if (pdfCreator != null) {
log.debug("about to create the PDF file");
sleep();
pdfCreator.storeToURL(
sPDFUrl.toString(), filterOpts);
log.debug("done");
}
}
}
}
Thanks in advance.

Glad that suggestion of making the document visible helped. Since it has ALSO fixed the problem you have a timing/threading issue. I suspect you'll find that another dodgy option of doing a sleep before executing the save to PDF will also allow the images to appear. Neither of these solutions is good.
Most likley best fix is to upgrade to a newer version of Open Office (the API calls you have should still work). Another option would be to try to call the API to ask the document to refresh itself.

After finding the correct property I was able to open the file with the hidden property set to false, this meant when the file was exported to PDF it included the background images. Its a shame I could not find another solultion that kept the file hidden but at least its working.

How to get list of properties using apache.commons

I need to get the list of properties which are in the .properties file. For example, if have the following .properties file:
users.admin.keywords = admin
users.admin.regexps = test-5,test-7
users.admin.rules = users.admin.keywords,users.admin.regexps
users.root.keywords = newKeyWordq
users.root.regexps = asdasd,\u0432[\u044By][\u0448s]\u043B\u0438\u0442[\u0435e]
users.root.rules = users.root.keywords,users.root.regexps,rules.creditcards
users.guest.keywords = guest
users.guest.regexps = *
users.guest.rules = users.guest.keywords,users.guest.regexps,rules.creditcards
rules.cc.creditcards = 1234123412341234,11231123123123123,ca
rules.common.regexps = pas
rules.common.keywords = asd
And as a result I'd like to get an ArrayList which consists of names of fields like this:
users.admin.keywords, users.admin.regexps, users.admin.rules and so on. And as you have noticed, I need to do this using apache.commons.config

You can use as below:
Configuration configuration = new PropertiesConfiguration(filename);
Iterator<String> keys = configuration.getKeys();
List<String> keyList = new ArrayList<String>();
while(keys.hasNext()) {
keyList.add(keys.next());
}

Properties prop = new Properties();
prop.load(new FileInputStream("prop.properties"));
Set<Map.Entry<Object, Object>> set = prop.entrySet();
List<Object> list = new ArrayList<>();
for (Map.Entry<Object, Object> entry : prop.entrySet())
{
list.add(entry.getKey());
}
System.out.println(list);
Using Apache Commons version <2.1:
Configuration config = new PropertiesConfiguration("prop.properties");
List<String> list = new ArrayList<>();
Iterator<String> keys = config.getKeys();
while(keys.hasNext()){
String key = (String) keys.next();
list.add(key);
}
Edited for Apache Commons Version 2.1:
List<String> list = new ArrayList<>();
Parameters params = new Parameters();
FileBasedConfigurationBuilder<FileBasedConfiguration> builder =
new FileBasedConfigurationBuilder<FileBasedConfiguration>
(PropertiesConfiguration.class)
.configure(params.properties()
.setFileName("prop.properties"));
try
{
Configuration config = builder.getConfiguration();
Iterator<String> keys = config.getKeys();
while(keys.hasNext()){
String key = (String) keys.next();
list.add(key);
}
}
catch(ConfigurationException cex)
{
// handle exception here
}

You can use getKeys().
It returns an Iterator<String> on all the keys in the properties file.