How to convert a string (representing key-value pairs) to Map - string

How can I convert a String into a Map:
Map m = convert("A=4 H=X PO=87"); // What's convert?
System.err.println(m.getClass().getSimpleName()+m);
Expected output
HashMap{A=4, H=X, PO=87}


There is no need to reinvent the wheel. The Google Guava library provides the Splitter class.
Here's how you can use it along with some test code:
package com.sandbox;
import com.google.common.base.Splitter;
import org.junit.Test;
import java.util.Map;
import static org.junit.Assert.assertEquals;
public class SandboxTest {
#Test
public void testQuestionInput() {
Map<String, String> map = splitToMap("A=4 H=X PO=87");
assertEquals("4", map.get("A"));
assertEquals("X", map.get("H"));
assertEquals("87", map.get("PO"));
}
private Map<String, String> splitToMap(String in) {
return Splitter.on(" ").withKeyValueSeparator("=").split(in);
}
}


package com.sandbox;
import com.google.common.base.Splitter;
import org.junit.Test;
import java.util.Map;
import static org.junit.Assert.assertEquals;
public class SandboxTest {
#Test
public void testQuestionInput() {
Map<String, String> map = splitToMap("A=4 H=X PO=87");
assertEquals("4", map.get("A"));
assertEquals("X", map.get("H"));
assertEquals("87", map.get("PO"));
}
private Map<String, String> splitToMap(String in) {
return Splitter.on(" ").withKeyValueSeparator("=").split(in);
}
}

Related

Quarkus Panache Mockito fails

I struggle with mocking a Panache repository.
Here is the Entity:
import javax.persistence.*;
#Entity
public class Thing {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id", nullable = false)
private Long id;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}
Simple repository:
import io.quarkus.hibernate.orm.panache.PanacheRepository;
import javax.enterprise.context.ApplicationScoped;
#ApplicationScoped
public class ThingRepository implements PanacheRepository<Thing> {
}
This is the resource:
import javax.inject.Inject;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import java.util.List;
#Path("/things")
#Produces(MediaType.APPLICATION_JSON)
#Consumes(MediaType.APPLICATION_JSON)
public class ThingResource {
#Inject
ThingRepository thingRepository;
#GET
public List<Thing> list() {
return thingRepository.listAll();
}
}
and a simple test where I try to mock the repository:
import io.quarkus.test.junit.QuarkusTest;
import io.quarkus.test.junit.mockito.InjectMock;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.Mockito;
import javax.inject.Inject;
import java.util.ArrayList;
import java.util.List;
import static org.junit.jupiter.api.Assertions.assertNotNull;
#QuarkusTest
class ThingResourceTest {
private Thing thing;
#Inject ThingResource thingResource;
#InjectMock ThingRepository thingRepository;
#BeforeEach
void setUp() {
Thing thing = new Thing();
thing.setId(1L);
}
#Test
void getAll() {
List<Thing> things = new ArrayList<Thing>();
things.add(thing);
Mockito.when(thingRepository.listAll()).thenReturn(things);
List<Thing> response = thingResource.list();
assertNotNull(response);
assertNotNull(response.get(0));
}
}
The test fails because the response list is <null>.
The debugger tells me the thingRepository is actually mocked. But for some reason Mockito.when().thenReturns() does not return the list I set up.
What am I missing?
Thank you for any help.

I had the thing double declared. One time as class variable, and again in setUp(). Bummer. I apologize for the noise.

Error org.picocontainer.PicoCompositionException: Duplicate Keys not allowed. Duplicate

I was trying to achieve, Cucumber feature level parallel execution using pico Container.
When I am using a shared Driver in a context Class as below, I get org.picocontainer.PicoCompositionException: Duplicate Keys not allowed. Duplicate
public class Context{
private ThreadLocal<WebDriver> drivers = new ThreadLocal<>();
public void setDriver(WebDriver wd) {
drivers.set(wd);
}
public WebDriver getDriver() {
return drivers.get();
}
//Runner Class
import java.net.MalformedURLException;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import cucumber.api.CucumberOptions;
import cucumber.api.testng.CucumberFeatureWrapper;
import cucumber.api.testng.TestNGCucumberRunner;
import net.thumbtack.cucumber.picocontainer.example.step.SharedDriver;
import cucumber.api.testng.*;
#CucumberOptions (glue = {"net.thumbtack.cucumber.picocontainer.example.step"},
features = "src/main/resources/"
,tags = {"#Scenario2,#Scenario3"})
public class TestRunner {
public TestRunner() throws MalformedURLException {
super();
// TODO Auto-generated constructor stub
}
private TestNGCucumberRunner testNGCucumberRunner;
#BeforeClass(alwaysRun = true)
public void setUpClass() throws Exception {
testNGCucumberRunner = new TestNGCucumberRunner(this.getClass());
System.setProperty("ExecEnv","Docker");
}
// #Test(dataProvider = "features")
// public void feature(PickleEventWrapper eventwrapper,CucumberFeatureWrapper cucumberFeature) throws Throwable {
#Test(groups="cucumber", description="Runs CucumberFeature",dataProvider = "features")
public void feature(CucumberFeatureWrapper cucumberFeature){
testNGCucumberRunner.runCucumber(cucumberFeature.getCucumberFeature());
// testNGCucumberRunner.runScenario(eventwrapper.getPickleEvent());
}
#DataProvider(parallel=true)
public Object[][] features() {
return testNGCucumberRunner.provideFeatures();
// return testNGCucumberRunner.provideScenarios();
}
#AfterClass(alwaysRun = true)
public void tearDownClass() throws Exception {
testNGCucumberRunner.finish();
}
}

How do I use Mockito to test that a Java 8 Stream had the expected values?

One of the interactions I want to test is that a class Foo is supposed to pass a Stream<Changes> to FooListener.someChangesHappened. Is there a Mockito idiom to verify that a stream contained the expected objects?

Assuming you are just verifying the argument to a mock implementation, and are not actually using it, here is a custom Hamcrest Matcher that will get the job done. It gets hairy when you need to read from the Stream more than once, because Streams are not built for that. You'll notice that this solution even needs to protect itself from JUnit calling matches more than once.
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static org.hamcrest.Matchers.hasItem;
import static org.hamcrest.Matchers.not;
import static org.mockito.Matchers.argThat;
import static org.mockito.Mockito.verify;
#RunWith(MockitoJUnitRunner.class)
public class Foo {
#Mock
FooListener fooListener;
#Before
public void happen() {
fooListener.someChangesHappened(Stream.of(Changes.ONE, Changes.TWO, Changes.THREE));
}
#Test
public void contains() {
verify(fooListener).someChangesHappened(argThat(streamThat(hasItem(Changes.TWO))));
}
#Test
public void doesNotContain() {
verify(fooListener).someChangesHappened(argThat(streamThat(not(hasItem(Changes.FOUR)))));
}
private static <T> Matcher<Stream<T>> streamThat(Matcher<Iterable<? super T>> toMatch) {
return new IterableStream<>(toMatch);
}
private interface FooListener {
void someChangesHappened(Stream<Changes> stream);
}
private enum Changes {
ONE, TWO, THREE, FOUR
}
private static class IterableStream<T> extends TypeSafeMatcher<Stream<T>> {
Matcher<Iterable<? super T>> toMatch;
List<T> input = null;
public IterableStream(Matcher<Iterable<? super T>> toMatch) {
this.toMatch = toMatch;
}
#Override
protected synchronized boolean matchesSafely(Stream<T> item) {
// This is to protect against JUnit calling this more than once
input = input == null ? item.collect(Collectors.toList()) : input;
return toMatch.matches(input);
}
#Override
public void describeTo(Description description) {
description.appendText("stream that represents ");
toMatch.describeTo(description);
}
}
}

CDI #Decorator, Is there a way to deactivate a decorator at runtime?

I use the following workaround in order to control the behaviour of a #Decorator since I couldn't find a way to deactivate it.
if (!FacesContext.getCurrentInstance().getViewRoot().getViewId()
.endsWith("decoratorDemo.xhtml")) {
return transInterBean.getTransactionalInsertRecords();
} else {
...
}
Is there no way to decide at runtime whether a decorator should be applied?
package com.cdi.decorators;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Iterator;
import javax.decorator.Decorator;
import javax.decorator.Delegate;
import javax.enterprise.inject.Any;
import javax.faces.context.FacesContext;
import javax.inject.Inject;
import com.cdi.cdibeans.TransactionalInterceptor;
import com.cdi.cdibeans.TransactionalInterceptorBean;
#Decorator
public abstract class TransactionalInterceptorDecorator implements
TransactionalInterceptor {
/**
*
*/
private static final long serialVersionUID = -1191671082441891759L;
#Inject
#Delegate
#Any
TransactionalInterceptorBean transInterBean;
#Override
public ArrayList<String> getTransactionalInsertRecords()
throws SQLException {
ArrayList<String> records = new ArrayList<String>();
if (!FacesContext.getCurrentInstance().getViewRoot().getViewId()
.endsWith("decoratorDemo.xhtml")) {
return transInterBean.getTransactionalInsertRecords();
} else {
Iterator<String> iter = transInterBean
.getTransactionalInsertRecords().iterator();
while (iter.hasNext()) {
String record = iter.next();
records.add(record);
records.add(">>>Decorator<<< Added record ... ");
}
if (records.isEmpty()) {
records.add(">>>Decorator<<< Currently there are no records yet!");
}
return records;
}
}
}

Deltaspike has an exclude feature ... may be this could help, I didn't try it with decorators.

JavaFX: Adding rows to TableView with a HashMap binding

Suppose that I have a map collection:
ObserableHashMap<K,V> map = FXCollections.observableHashMap();
I put 1 record into this map during fxml controller initialization, then wrap it as ObservableList:
ObservableList<ObserableHashMap.Entry<K,V>> list = FXCollections.observableArrayList(map.entrySet());
then setitems for my tableView.setItems(list);
Everything is fine when I run this JavaFX app and 1 record is showing.
Question is that:
When I add more records later to my map, my TableView will not refresh these records.
How could I bind a dynamical map collection into my TableView?
Thanks

If you use an ObservableList of ObservableMaps as your TableView's data structure
ObservableList<ObservableMap> rowMaps = FXCollections.observableArrayList();
tableView.setItems(rowMaps);
and implement your own ObservableMapValueFactory
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.value.ObservableValue;
import javafx.collections.MapChangeListener;
import javafx.collections.ObservableMap;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableColumn.CellDataFeatures;
import javafx.util.Callback;
public class ObservableMapValueFactory<V> implements
Callback<TableColumn.CellDataFeatures<ObservableMap, V>, ObservableValue<V>> {
private final Object key;
public ObservableMapValueFactory(Object key) {
this.key = key;
}
#Override
public ObservableValue<V> call(CellDataFeatures<ObservableMap, V> features) {
final ObservableMap map = features.getValue();
final ObjectProperty<V> property = new SimpleObjectProperty<V>((V) map.get(key));
map.addListener(new MapChangeListener<Object, V>() {
public void onChanged(Change<?, ? extends V> change) {
if (key.equals(change.getKey())) {
property.set((V) map.get(key));
}
}
});
return property;
}
}
and then set it as the cell value factory for your column(s)
column.setCellValueFactory(new ObservableMapValueFactory<String>(columnId));
all changes to your data are reflected in the TableView, even changes only affecting the ObservableMaps.

You can bind a map directly to a TableView, consider this example from the JavaFX documentation :
import java.util.HashMap;
import java.util.Map;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.MapValueFactory;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
import javafx.util.Callback;
import javafx.util.StringConverter;
public class TableViewSample extends Application {
public static final String Column1MapKey = "A";
public static final String Column2MapKey = "B";
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage stage) {
Scene scene = new Scene(new Group());
stage.setTitle("Table View Sample");
stage.setWidth(300);
stage.setHeight(500);
final Label label = new Label("Student IDs");
label.setFont(new Font("Arial", 20));
TableColumn<Map, String> firstDataColumn = new TableColumn<>("Class A");
TableColumn<Map, String> secondDataColumn = new TableColumn<>("Class B");
firstDataColumn.setCellValueFactory(new MapValueFactory(Column1MapKey));
firstDataColumn.setMinWidth(130);
secondDataColumn.setCellValueFactory(new MapValueFactory(Column2MapKey));
secondDataColumn.setMinWidth(130);
TableView table_view = new TableView<>(generateDataInMap());
table_view.setEditable(true);
table_view.getSelectionModel().setCellSelectionEnabled(true);
table_view.getColumns().setAll(firstDataColumn, secondDataColumn);
Callback<TableColumn<Map, String>, TableCell<Map, String>>
cellFactoryForMap = new Callback<TableColumn<Map, String>,
TableCell<Map, String>>() {
#Override
public TableCell call(TableColumn p) {
return new TextFieldTableCell(new StringConverter() {
#Override
public String toString(Object t) {
return t.toString();
}
#Override
public Object fromString(String string) {
return string;
}
});
}
};
firstDataColumn.setCellFactory(cellFactoryForMap);
secondDataColumn.setCellFactory(cellFactoryForMap);
final VBox vbox = new VBox();
vbox.setSpacing(5);
vbox.setPadding(new Insets(10, 0, 0, 10));
vbox.getChildren().addAll(label, table_view);
((Group) scene.getRoot()).getChildren().addAll(vbox);
stage.setScene(scene);
stage.show();
}
private ObservableList<Map> generateDataInMap() {
int max = 10;
ObservableList<Map> allData = FXCollections.observableArrayList();
for (int i = 1; i < max; i++) {
Map<String, String> dataRow = new HashMap<>();
String value1 = "A" + i;
String value2 = "B" + i;
dataRow.put(Column1MapKey, value1);
dataRow.put(Column2MapKey, value2);
allData.add(dataRow);
}
return allData;
}
}
More information can be found here

The answer from ItachiUchiha use the columns as keys and the rows as individual maps. If you'd like one map with the rows as keys->values, you'll have to add a listener to the map that will change the list when you add or delete. I did something similar here. https://stackoverflow.com/a/21339428/2855515

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