I'm writing an app for Java ME, and I need a class for holding some data(PhoneBook). When I'm trying to launch this app, I'm always getting a nullPointerException. I'm calling the constructor of a class, and it allocates memory for 10 elements, so it shouldn't be null. What am I doing wrong?
import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
public class TinyMIDlet extends MIDlet implements CommandListener {
private PhoneBook phoneBook = new PhoneBook();
public void initPhoneBook() {
phoneBook.records[0].Name = new String("abc");
}
protected void startApp() {
initPhoneBook();
}
public class Record {
public String Name;
public String Number;
public String email;
public String Group;
}
public class PhoneBook {
public Record[] records;
PhoneBook() {
records = new Record[10];
}
}
}
The array of records isn't null, but each individual element of it is. You need to instantiate each element as well, right now it's just an array with 10 null entries.
phoneBook.records[0].Name = new String("abc");
should be
phoneBook.records[0] = new Record();
phoneBook.records[0].Name= new String("abc");// or = "abc"
I'm not reputable enough yet (heh) to edit Tom's detailed answer, but, to be precise
phoneBook.records[0] = new something();
should be
phoneBook.records[0] = new Record();
Related
In a GXT Grid I am attempting to use RowEditing and the CheckBoxSelectionModel. The Sencha Explorer Demo has examples of these in the Row Editable Grid and CheckBox Grid samples, but they don't show an example that includes a combination of these features. When I use both features on the same grid I am not getting the behavior that I had expected. If I click on the "selection" checkbox the row is placed into edit mode, where I would have expected the checkbox to just change from checked to unchecked or vice versa. In addition, when the row is placed into edit mode there is corruption on the line. Here is an example of a row from the grid prior to clicking on any of the values in that row:
and here is that row after clicking on one of the values:
Does anyone have any experience with this?
Update
Here's a sample class which demonstrates the issue:
package org.greatlogic.gxtgrid.client;
import java.util.ArrayList;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootLayoutPanel;
import com.sencha.gxt.core.client.IdentityValueProvider;
import com.sencha.gxt.core.client.ValueProvider;
import com.sencha.gxt.data.shared.ListStore;
import com.sencha.gxt.data.shared.ModelKeyProvider;
import com.sencha.gxt.widget.core.client.ContentPanel;
import com.sencha.gxt.widget.core.client.form.TextField;
import com.sencha.gxt.widget.core.client.grid.CheckBoxSelectionModel;
import com.sencha.gxt.widget.core.client.grid.ColumnConfig;
import com.sencha.gxt.widget.core.client.grid.ColumnModel;
import com.sencha.gxt.widget.core.client.grid.Grid;
import com.sencha.gxt.widget.core.client.grid.GridView;
import com.sencha.gxt.widget.core.client.grid.editing.GridRowEditing;
public class GXTGrid implements EntryPoint {
//-------------------------------------------------------------------------
#Override
public void onModuleLoad() {
ListStore<Pet> listStore = new ListStore<>(new ModelKeyProvider<Pet>() {
#Override
public String getKey(Pet pet) {
return Integer.toString(pet.getPetId());
}
});
IdentityValueProvider<Pet> ivp = new IdentityValueProvider<>();
CheckBoxSelectionModel<Pet> sm = new CheckBoxSelectionModel<>(ivp);
ArrayList<ColumnConfig<Pet, ?>> ccList = new ArrayList<>();
ccList.add(sm.getColumn());
ColumnConfig<Pet, String> cc1;
cc1 = new ColumnConfig<>(Pet.getPetNameValueProvider(), 100, "Name");
ccList.add(cc1);
ColumnModel<Pet> columnModel = new ColumnModel<>(ccList);
Grid<Pet> grid = new Grid<>(listStore, columnModel);
grid.setSelectionModel(sm);
grid.setView(new GridView<Pet>());
GridRowEditing<Pet> gre = new GridRowEditing<>(grid);
gre.addEditor(cc1, new TextField());
listStore.add(new Pet(1, "Lassie"));
listStore.add(new Pet(2, "Scooby"));
listStore.add(new Pet(3, "Snoopy"));
ContentPanel contentPanel = new ContentPanel();
contentPanel.add(grid);
RootLayoutPanel.get().add(contentPanel);
}
//-------------------------------------------------------------------------
private static class Pet {
private int _petId;
private String _petName;
public static ValueProvider<Pet, String> getPetNameValueProvider() {
return new ValueProvider<Pet, String>() {
#Override
public String getPath() {
return "Pet.PetName";
}
#Override
public String getValue(Pet pet) {
return pet._petName;
}
#Override
public void setValue(Pet pet, final String value) {
pet._petName = value;
}
};
}
public Pet(int petId, final String petName) {
_petId = petId;
_petName = petName;
}
public int getPetId() {
return _petId;
}
}
//-------------------------------------------------------------------------
}
This behavior of GridRowEditing with CheckBoxSelectionModel is completely normal.
I have used you code to try some things. I think the best way to use GridRowEditing and CheckBoxSelectionModel is, as I guessed, to start editing on double click, as nothing is provided to do it with just one click yet. To do so just add
gre.setClicksToEdit(ClicksToEdit.TWO);
Otherwise, if you really do not want to use two clicks to start editing, you can also use InlineRowEditing, which will enable you to use CheckBoxSelectionModel as you want.
Eventually, you might be able to override the whole behavior of GridRowEditing to handle CheckBoxSelectionModel properly on one click only, but it would be more complicated and require more specific knowledge of GXT framework that I don't have.
I haven't found a solution to this problem using the CheckBoxSelectionModel, and so I decided to try another approach, namely, adding a column to the grid that contains a checkbox, and handling the state of the selections manually. To do this I found that I needed to respond to a few events, which wasn't too bad. Here's a new version of the sample code, which should provide a starting point for a real implementation:
import java.util.ArrayList;
import java.util.TreeSet;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.user.client.ui.RootLayoutPanel;
import com.sencha.gxt.cell.core.client.form.CheckBoxCell;
import com.sencha.gxt.core.client.ValueProvider;
import com.sencha.gxt.core.client.dom.XElement;
import com.sencha.gxt.data.shared.ListStore;
import com.sencha.gxt.data.shared.ModelKeyProvider;
import com.sencha.gxt.widget.core.client.ContentPanel;
import com.sencha.gxt.widget.core.client.form.CheckBox;
import com.sencha.gxt.widget.core.client.form.Field;
import com.sencha.gxt.widget.core.client.form.TextField;
import com.sencha.gxt.widget.core.client.grid.CellSelectionModel;
import com.sencha.gxt.widget.core.client.grid.ColumnConfig;
import com.sencha.gxt.widget.core.client.grid.ColumnModel;
import com.sencha.gxt.widget.core.client.grid.Grid;
import com.sencha.gxt.widget.core.client.grid.GridView;
import com.sencha.gxt.widget.core.client.grid.editing.GridRowEditing;
public class GXTGrid implements EntryPoint {
//-------------------------------------------------------------------------
private ListStore<Pet> _listStore;
private TreeSet<Integer> _selectedPetIdSet;
//-------------------------------------------------------------------------
#Override
public void onModuleLoad() {
_selectedPetIdSet = new TreeSet<>();
_listStore = new ListStore<>(new ModelKeyProvider<Pet>() {
#Override
public String getKey(Pet pet) {
return Integer.toString(pet.getPetId());
}
});
final CellSelectionModel<Pet> sm = new CellSelectionModel<>();
ArrayList<ColumnConfig<Pet, ?>> ccList = new ArrayList<>();
ValueProvider<Pet, Boolean> selectValueProvider;
selectValueProvider = new ValueProvider<GXTGrid.Pet, Boolean>() {
#Override
public String getPath() {
return "SelectCheckBox";
}
#Override
public Boolean getValue(Pet pet) {
return _selectedPetIdSet.contains(pet.getPetId());
}
#Override
public void setValue(Pet pet, final Boolean selected) { //
}
};
ColumnConfig<Pet, Boolean> cc0 = new ColumnConfig<>(selectValueProvider, 23, "");
CheckBoxCell checkBoxCell = new CheckBoxCell() {
#Override
protected void onClick(XElement parent, final NativeEvent event) {
super.onClick(parent, event);
Pet pet = sm.getSelectedItem();
if (!_selectedPetIdSet.remove(pet.getPetId())) {
_selectedPetIdSet.add(pet.getPetId());
}
}
};
cc0.setCell(checkBoxCell);
cc0.setFixed(true);
cc0.setHideable(false);
cc0.setMenuDisabled(true);
cc0.setResizable(false);
cc0.setSortable(false);
ccList.add(cc0);
ColumnConfig<Pet, String> cc1;
cc1 = new ColumnConfig<>(Pet.getPetNameValueProvider(), 100, "Name");
ccList.add(cc1);
ColumnModel<Pet> columnModel = new ColumnModel<>(ccList);
Grid<Pet> grid = new Grid<>(_listStore, columnModel);
grid.setSelectionModel(sm);
grid.setView(new GridView<Pet>());
GridRowEditing<Pet> gre = new GridRowEditing<>(grid);
Field<Boolean> checkBox = new CheckBox();
checkBox.setEnabled(false);
gre.addEditor(cc0, checkBox);
gre.addEditor(cc1, new TextField());
_listStore.add(new Pet(1, "Lassie"));
_listStore.add(new Pet(2, "Scooby"));
_listStore.add(new Pet(3, "Snoopy"));
ContentPanel contentPanel = new ContentPanel();
contentPanel.add(grid);
RootLayoutPanel.get().add(contentPanel);
}
//-------------------------------------------------------------------------
private static class Pet {
private int _petId;
private String _petName;
public static ValueProvider<Pet, String> getPetNameValueProvider() {
return new ValueProvider<Pet, String>() {
#Override
public String getPath() {
return "Pet.PetName";
}
#Override
public String getValue(Pet pet) {
return pet._petName;
}
#Override
public void setValue(Pet pet, final String value) {
pet._petName = value;
}
};
}
public Pet(int petId, final String petName) {
_petId = petId;
_petName = petName;
}
public int getPetId() {
return _petId;
}
}
//-------------------------------------------------------------------------
}
This is a followup to my previous post at ToolTip Performance in XPages I have got the code to do it written (not tested) so I can't seem to get my Managed Bean to get called properly. My config contians the following:
<managed-bean id="ToolTip">
<managed-bean-name>WFSToolTip</managed-bean-name>
<managed-bean-class>ca.workflo.wfsToolTip.ToolTipText</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
and I have stripped my code down to the bare minimum:
package ca.workflo.wfsToolTip;
public class ToolTipText {
public String getToolTipText(String key){
return key;
}
}
My class is in the build path. I have a simple XPage with one filed on it and a tool tip for that field. The code for the tooltip is:
<xe:tooltip id="tooltip1" for="inputText1">
<xe:this.label>
<![CDATA[#{javascript:WFSToolTip.getToolTipText("More Stuff");}]]>
</xe:this.label>
</xe:tooltip>
When I load the test XPage in the browser I get an error that:
Error while executing JavaScript computed expression
Script interpreter error, line=1, col=12: Error calling method 'getToolTipText(string)' on java class 'ca.workflo.wfsToolTip.ToolTipText'
JavaScript code
1: WFSToolTip.getToolTipText("More Stuff");
I can't figure out why the call to getToolTipText would fail.
Can anyone see where I'm going wrong. This is my first Managed Bean and at the moment it is managing me rather than the other way around.
Thanks.
You need to:
- implement Serializable which boils down to state it and provide a version
- implement Map ... a little more work
Then you use Expression Language instead of SSJS. It would look like #{WFSToolTip["More Stuff"]}
This is how such a class would look like. You need to:
adjust the view name to reflect the name you want
the view needs to be flat, column 1 = tooltip name, column 2 = tooltip text
somewhere (on an admin/config page) you need to call WFSToolTip.clear(); (in SSJS) after you update the values in the configuration.
The example doesn't lazyload since running though a view navigator once is really fast. No point to do all these lookups.
Here you go:
package com.notessensei.xpages;
import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.Vector;
import lotus.domino.Base;
import lotus.domino.Database;
import lotus.domino.NotesException;
import lotus.domino.View;
import lotus.domino.ViewEntry;
import lotus.domino.ViewEntryCollection;
import com.ibm.xsp.extlib.util.ExtLibUtil;
public class Parameters implements Serializable, Map<String, String> {
private final static String CONFIG_VIEW = "keywords";
private static final long serialVersionUID = 1L;
private final Map<String, String> internalMap = new HashMap<String, String>();
public Parameters() {
this.populateParameters(internalMap);
}
private void populateParameters(Map<String, String> theMap) {
Database d = ExtLibUtil.getCurrentDatabase();
try {
View v = d.getView(CONFIG_VIEW);
ViewEntryCollection vec = v.getAllEntries();
ViewEntry ve = vec.getFirstEntry();
ViewEntry nextVe = null;
while (ve != null) {
nextVe = vec.getNextEntry(ve);
// Load the parameters, column 0 is the key, column 0 the value
Vector colVal = ve.getColumnValues();
theMap.put(colVal.get(0).toString(), colVal.get(1).toString());
// Cleanup
this.shred(ve);
ve = nextVe;
}
// recycle, but not the current database!!!
this.shred(ve, nextVe, vec, v);
} catch (NotesException e) {
e.printStackTrace();
}
}
public void clear() {
this.internalMap.clear();
this.populateParameters(this.internalMap);
}
public boolean containsKey(Object key) {
return this.internalMap.containsKey(key);
}
public boolean containsValue(Object value) {
return this.internalMap.containsValue(value);
}
public Set<java.util.Map.Entry<String, String>> entrySet() {
return this.internalMap.entrySet();
}
public String get(Object key) {
return this.internalMap.get(key);
}
public boolean isEmpty() {
return this.internalMap.isEmpty();
}
public Set<String> keySet() {
return this.internalMap.keySet();
}
public String put(String key, String value) {
return this.internalMap.put(key, value);
}
public void putAll(Map<? extends String, ? extends String> m) {
this.internalMap.putAll(m);
}
public String remove(Object key) {
return this.internalMap.remove(key);
}
public int size() {
return this.internalMap.size();
}
public Collection<String> values() {
return this.internalMap.values();
}
private void shred(Base... morituri) {
for (Base obsoleteObject : morituri) {
if (obsoleteObject != null) {
try {
obsoleteObject.recycle();
} catch (NotesException e) {
// We don't care we want go get
// rid of it anyway
} finally {
obsoleteObject = null;
}
}
}
}
}
The difference to a regular HashMap is only the constructor that populates it. Hope that clarifies it.
I've never seen that id property.. My beans in faces-config look like this:
<managed-bean>
<managed-bean-name>CurrentJob</managed-bean-name>
<managed-bean-class>com.domain.inventory.Job</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
Technically managed beans should implement Serializable and have a blank constructor. So you should have something like this inside :
public ToolTipText() {
}
I THINK you can get away without the Serializable for somethings... I always implement though but I'm sure you need the no argument constructor.
Thanks to all that have responded and helped out here especially Stephan Wissel. I thought I would post my version of Stephan's code, pretty much the same. There are issues with making the class an ApplicationScope because you need to shut down the HTTP task to refresh and reload the Class. What I did was added a button to the custom control where I to the view of the tooltips where I do the CRUD stuff and in the button do WFSToolTip().clear() and it rebuilds the map. Pretty neat. My next task for this is try to do the CRUD using JAVA and update the map directly. At the moment though I need to move on to my next task.
My next task revolves around a very similar Class. I have a master database that contains all the basic design and code. Then I have one or more applications that use that code and store the documents in their own database that contains the forms and views for that specific application. In the master I have created one or more application documents. Each of these documents contains the AppName (the key value) then the Map value is an array (Vector) containing the ReplicaID of the Application Database and a few other pieces of information. My class the loads a Map entry for each Application and collects a bunch of other information about the application from several places and stores that in the Map Value. At this point then I can set Database db = thisClass.getDatabase("App Name"). so a single custom control can be used for any/all of the applications. Pretty cool. I think I could get to like this.
Anyway here is the code I'm using for the ToolTips - BTW It has taken an XPage with about 175 fields and 100+ tooltips from being painfully slow to being acceptable. The good thing about it is that the XPage is creating a process profile document and once created it is not frequently modified as an admin action - not an everyday user action.
Please feel free point out error, omitions or suggestions to the code:
package ca.workflo.wfsToolTip;
import lotus.domino.Base;
import lotus.domino.Session;
import lotus.domino.Database;
import lotus.domino.View;
import lotus.domino.NotesException;
import lotus.domino.ViewEntry;
import lotus.domino.ViewEntryCollection;
import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.Vector;
import com.ibm.xsp.extlib.util.ExtLibUtil;
public class ToolTipText implements Serializable, Map<String, String> {
private static final long serialVersionUID = 1L;
private Session s;
private String repID;
private Database db;
private Database helpDB;
private View helpView;
private ViewEntry ve;
private ViewEntry tVE;
private ViewEntryCollection veCol;
private final Map<String, String> internalMap = new HashMap<String, String>();
public ToolTipText() {
this.populateMap(internalMap);
}
private void populateMap(Map<String, String> theMap) {
try {
s = ExtLibUtil.getCurrentSession();
db = s.getCurrentDatabase();
repID = db.getProfileDocument("frmConfigProfile", "").getItemValue(
"WFSHelpRepID").firstElement().toString();
helpDB = s.getDbDirectory(null).openDatabaseByReplicaID(repID);
helpView = helpDB.getView("vwWFSToolTipHelp");
veCol = helpView.getAllEntries();
ve = veCol.getFirstEntry();
ViewEntry tVE = null;
while (ve != null) {
tVE = veCol.getNextEntry(ve);
Vector colVal = ve.getColumnValues();
theMap.put(colVal.get(0).toString(), colVal.get(1).toString());
recycleObjects(ve);
ve = tVE;
}
} catch (NotesException e) {
System.out.println(e.toString());
}finally{
recycleObjects(ve, tVE, veCol, helpView, helpDB);
}
}
public void clear() {
this.internalMap.clear();
this.populateMap(this.internalMap);
}
public boolean containsKey(Object key) {
return this.internalMap.containsKey(key);
}
public boolean containsValue(Object value) {
return this.internalMap.containsValue(value);
}
public Set<java.util.Map.Entry<String, String>> entrySet() {
return this.internalMap.entrySet();
}
public String get(Object key) {
try {
if (this.internalMap.containsKey(key)) {
return this.internalMap.get(key);
} else {
return "There is no Tooltip Help for " + key;
}
} catch (Exception e) {
return "error in tooltip get Object ";
}
}
public boolean isEmpty() {
return this.internalMap.isEmpty();
}
public Set<String> keySet() {
return this.internalMap.keySet();
}
public String put(String key, String value) {
return this.internalMap.put(key, value);
}
public void putAll(Map<? extends String, ? extends String> m) {
this.internalMap.putAll(m);
}
public String remove(Object key) {
return this.internalMap.remove(key);
}
public int size() {
return this.internalMap.size();
}
public Collection<String> values() {
return this.internalMap.values();
}
public static void recycleObjects(Object... args) {
for (Object o : args) {
if (o != null) {
if (o instanceof Base) {
try {
((Base) o).recycle();
} catch (Throwable t) {
// who cares?
}
}
}
}
}
}
I use REST and i was wondering if i can tell jaxb to insert a string field "as-it-is" into the outgoing xml.
Certainly i count unpack it before returning, but i would like to save this step.
#XmlRootElement(name="unnestedResponse")
public class Response{
#Insert annotation here ;-)
private String alreadyXml;
private int otherDate; ...
}
Is there a possability to tell JAXB to just use the String as it is without escapting? I want that the client does not have to parse my response and then parse this field.
greetings,
m
You can use the #XmlAnyElement and specify a DomHandler to keep a portion of the XML document as a String.
Customer
import javax.xml.bind.annotation.*;
#XmlRootElement
public class Customer {
private String bio;
#XmlAnyElement(BioHandler.class)
public String getBio() {
return bio;
}
public void setBio(String bio) {
this.bio = bio;
}
}
BioHandler
import java.io.*;
import javax.xml.bind.ValidationEventHandler;
import javax.xml.bind.annotation.DomHandler;
import javax.xml.transform.Source;
import javax.xml.transform.stream.*;
public class BioHandler implements DomHandler<String, StreamResult> {
private static final String BIO_START_TAG = "<bio>";
private static final String BIO_END_TAG = "</bio>";
private StringWriter xmlWriter = new StringWriter();
public StreamResult createUnmarshaller(ValidationEventHandler errorHandler) {
return new StreamResult(xmlWriter);
}
public String getElement(StreamResult rt) {
String xml = rt.getWriter().toString();
int beginIndex = xml.indexOf(BIO_START_TAG) + BIO_START_TAG.length();
int endIndex = xml.indexOf(BIO_END_TAG);
return xml.substring(beginIndex, endIndex);
}
public Source marshal(String n, ValidationEventHandler errorHandler) {
try {
String xml = BIO_START_TAG + n.trim() + BIO_END_TAG;
StringReader xmlReader = new StringReader(xml);
return new StreamSource(xmlReader);
} catch(Exception e) {
throw new RuntimeException(e);
}
}
}
For More Information
http://blog.bdoughan.com/2011/04/xmlanyelement-and-non-dom-properties.html
Following bdoughan's answer did not work for me as I encountered errors during marshalling when the text contained the '& character (e.g. in URLs or when using HTML entities such as e.g. " ").
I was able to resolve this by changing the custom DomHandler's marshal method to
public Source marshal(String et, ValidationEventHandler veh) {
Node node = new SimpleTextNode(et);
return new DOMSource(node);
}
where SimpleTextNode implements the Node interface as follows:
class SimpleTextNode implements Node {
String nodeValue = "";
#Override
public SimpleTextNode(String nodeValue) {
this.nodeValue = nodeValue;
}
#Override
public short getNodeType() {
return TEXT_NODE;
}
// the remaining methods of the Node interface are not needed during marshalling
// you can just use the code template of your IDE...
...
}
PS: I would have loved to leave this as a comment to bdoughan's answer, but unfortunately I have way too little reputation :-(
I am trying to figure out a way to have a class full of static objects which each can have a variety of static properties.
I want to be able to pass these properties around and even set them as static properties of other object and I also want to be able to switch through the objects.
Here is an example illustrating what I mean:
Creating and Sending a Message
class Program
{
static void Main(string[] args)
{
MarketOrder Order = new MarketOrder("DELL", MessageProperties.SecurityType.Equity, MessageProperties.ExchangeDestination.ARCA.PostOnly);
SendOrder(Order);
Console.ReadLine();
}
public static void SendOrder(MarketOrder Order)
{
switch (Order.SecurityType)
{
case MessageProperties.SecurityType.Equity:
// Equity sending logic here
break;
case MessageProperties.SecurityType.Option:
// Option sending logic here
break;
case MessageProperties.SecurityType.Future:
// Future sending logic here
break;
}
}
}
This does not want to compile because it won't let me switch the Order.SecurityType object.
MarketOrder Class
public class MarketOrder
{
public readonly string Symbol;
public readonly MessageProperties.SecurityType SecurityType;
public readonly MessageProperties.ExchangeDestination ExchangeDestination;
public MarketOrder(string Symbol, MessageProperties.SecurityType SecurityType, MessageProperties.ExchangeDestination ExchangeDestination)
{
this.Symbol = Symbol;
this.SecurityType = SecurityType;
this.ExchangeDestination = ExchangeDestination;
}
}
MessageProperties Class
public abstract class MessageProperties
{
public class ExchangeDestination
{
public readonly string Value;
public readonly double ExchangeFee;
public ExchangeDestination(string Value, double ExchangeFeed)
{
this.Value = Value;
this.ExchangeFee = ExchangeFee;
}
public abstract class ARCA
{
public static ExchangeDestination Only = new ExchangeDestination("ARCA.ONLY", 0.01);
public static ExchangeDestination PostOnly = new ExchangeDestination("ARCA.ONLYP", 0.02);
}
public abstract class NYSE
{
public static ExchangeDestination Only = new ExchangeDestination("NYSE.ONLY", 0.01);
public static ExchangeDestination PostOnly = new ExchangeDestination("NYSE.ONLYP", 0.03);
}
}
public class SecurityType
{
public readonly string Value;
public SecurityType(string Value)
{
this.Value = Value;
}
public static SecurityType Equity = new SecurityType("EQ");
public static SecurityType Option = new SecurityType("OPT");
public static SecurityType Future = new SecurityType("FUT");
}
}
Enums work perfectly for what I am trying to do except it is hard to have multiple properties of an enum value. I considered using Attributes on Enums to set the properties but getting those vs. getting static properties of objects is substantially slower and my application is extremely speed/latency sensitive.
Is there perhaps a better way of accomplishing what I am trying to do?
Thanks in advance for your help!
William
How to read variable length String from a C struct using Javolution API?
For example the code below is used to get a fixed size String-
public final UTF8String data= new UTF8String(100);
Can anyone give me an example for reading variable length String.
This is what we have and we are learning as well:
public class EvDasTestResults extends AbstractServiceJavolutionObject
{
public final Signed32 result = new Signed32();
public final UTF8String description;
public EvDasTestResults(int size)
{
description = new UTF8String(size);
}
}
public abstract class AbstractServiceJavolutionObject extends Struct
{
#Override
public ByteOrder byteOrder()
{
return ByteOrder.nativeOrder();
}
#Override
public boolean isPacked()
{
return true;
}
}