iSharkFly-Open/Java-Tutorials
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[JAVA-22519] Created new module libraries-stream and added 5 articles (#15403)

Browse Source
This commit is contained in:
panos-kakos
2023-12-13 08:40:13 +01:00
committed by GitHub
parent 0323a8168c
commit 8daf19c9ec
92 changed files with 718 additions and 430 deletions
Download Patch File Download Diff File Expand all files Collapse all files
libraries-4/README.md
-2
View File
@@ -11,9 +11,7 @@ Remember, for advanced libraries like [Jackson](/jackson) and [JUnit](/testing-m
- [Quick Guide to RSS with Rome](https://www.baeldung.com/rome-rss)
- [Introduction to PCollections](https://www.baeldung.com/java-pcollections)
- [Introduction to Eclipse Collections](https://www.baeldung.com/eclipse-collections)
- [DistinctBy in the Java Stream API](https://www.baeldung.com/java-streams-distinct-by)
- [Introduction to NoException](https://www.baeldung.com/no-exception)
- [Spring Yarg Integration](https://www.baeldung.com/spring-yarg)
- [Delete a Directory Recursively in Java](https://www.baeldung.com/java-delete-directory)
- [Guide to JDeferred](https://www.baeldung.com/jdeferred)
- [Introduction to MBassador](https://www.baeldung.com/mbassador)
libraries-4/pom.xml
+17 -19
View File
@@ -22,17 +22,6 @@
<artifactId>eclipse-collections</artifactId>
<version>${eclipse-collections.version}</version>
</dependency>
<dependency>
<groupId>com.haulmont.yarg</groupId>
<artifactId>yarg</artifactId>
<version>${yarg.version}</version>
<exclusions>
<exclusion>
<groupId>org.olap4j</groupId>
<artifactId>olap4j</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.olap4j</groupId>
<artifactId>olap4j</artifactId>
@@ -68,11 +57,6 @@
<artifactId>servlet-api</artifactId>
<version>${javax.servlet.version}</version>
</dependency>
<dependency>
<groupId>io.vavr</groupId>
<artifactId>vavr</artifactId>
<version>${vavr.version}</version>
</dependency>
<dependency>
<groupId>org.pcollections</groupId>
<artifactId>pcollections</artifactId>
@@ -119,21 +103,33 @@
<artifactId>jackson-annotations</artifactId>
<version>${jackson-annotations.version}</version>
</dependency>
<dependency>
<groupId>io.vavr</groupId>
<artifactId>vavr</artifactId>
<version>${vavr.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${commons-io.version}</version>
</dependency>
</dependencies>
<properties>
<jackson-annotations.version>2.14.2</jackson-annotations.version>
<jackson-core.version>2.14.2</jackson-core.version>
<jdeferred.version>1.2.6</jdeferred.version>
<eclipse-collections.version>8.2.0</eclipse-collections.version>
<noexception.version>1.1.0</noexception.version>
<yarg.version>2.0.12</yarg.version>
<mbassador.version>1.3.1</mbassador.version>
<rome.version>1.0</rome.version>
<spring.version>4.3.8.RELEASE</spring.version>
<javax.servlet.version>2.5</javax.servlet.version>
<javax.jdo.version>3.2.0-m7</javax.jdo.version>
<vavr.version>0.9.0</vavr.version>
<pcollections.version>2.1.2</pcollections.version>
<awaitility.version>3.0.0</awaitility.version>
<streamex.version>0.6.5</streamex.version>
@@ -142,6 +138,8 @@
<olap4j.version>1.2.0</olap4j.version>
<javafx.version>19</javafx.version>
<spoon-core.version>10.3.0</spoon-core.version>
<eclipse-collections.version>8.2.0</eclipse-collections.version>
<vavr.version>0.9.0</vavr.version>
</properties>
</project>
libraries-4/src/main/java/com/baeldung/distinct/DistinctWithJavaFunction.java
-15
View File
@@ -1,15 +0,0 @@
package com.baeldung.distinct;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Function;
import java.util.function.Predicate;
public class DistinctWithJavaFunction {
public static <T> Predicate<T> distinctByKey(Function<? super T, ?> keyExtractor) {
Map<Object, Boolean> seen = new ConcurrentHashMap<>();
return t -> seen.putIfAbsent(keyExtractor.apply(t), Boolean.TRUE) == null;
}
}
libraries-4/src/main/java/com/baeldung/distinct/Person.java
-65
View File
@@ -1,65 +0,0 @@
package com.baeldung.distinct;
public class Person {
int age;
String name;
String email;
public Person(int age, String name, String email) {
super();
this.age = age;
this.name = name;
this.email = email;
}
public int getAge() {
return age;
}
public String getName() {
return name;
}
public String getEmail() {
return email;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("Person [age=");
builder.append(age);
builder.append(", name=");
builder.append(name);
builder.append(", email=");
builder.append(email);
builder.append("]");
return builder.toString();
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((email == null) ? 0 : email.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Person other = (Person) obj;
if (email == null) {
if (other.email != null)
return false;
} else if (!email.equals(other.email))
return false;
return true;
}
}
libraries-4/src/main/java/com/baeldung/yarg/DocumentController.java
-48
View File
@@ -1,48 +0,0 @@
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package com.baeldung.yarg;
import com.haulmont.yarg.formatters.factory.DefaultFormatterFactory;
import com.haulmont.yarg.loaders.factory.DefaultLoaderFactory;
import com.haulmont.yarg.loaders.impl.JsonDataLoader;
import com.haulmont.yarg.reporting.Reporting;
import com.haulmont.yarg.reporting.RunParams;
import com.haulmont.yarg.structure.Report;
import com.haulmont.yarg.structure.ReportBand;
import com.haulmont.yarg.structure.ReportOutputType;
import com.haulmont.yarg.structure.impl.BandBuilder;
import com.haulmont.yarg.structure.impl.ReportBuilder;
import com.haulmont.yarg.structure.impl.ReportTemplateBuilder;
import java.io.File;
import java.io.IOException;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.io.FileUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class DocumentController {
@RequestMapping(path = "/generate/doc", method = RequestMethod.GET)
public void generateDocument(HttpServletResponse response) throws IOException {
ReportBuilder reportBuilder = new ReportBuilder();
ReportTemplateBuilder reportTemplateBuilder = new ReportTemplateBuilder().documentPath("./src/main/resources/Letter.docx").documentName("Letter.docx").outputType(ReportOutputType.docx).readFileFromPath();
reportBuilder.template(reportTemplateBuilder.build());
BandBuilder bandBuilder = new BandBuilder();
String json = FileUtils.readFileToString(new File("./src/main/resources/Data.json"));
ReportBand main = bandBuilder.name("Main").query("Main", "parameter=param1 $.main", "json").build();
reportBuilder.band(main);
Report report = reportBuilder.build();
Reporting reporting = new Reporting();
reporting.setFormatterFactory(new DefaultFormatterFactory());
reporting.setLoaderFactory(new DefaultLoaderFactory().setJsonDataLoader(new JsonDataLoader()));
response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
reporting.runReport(new RunParams(report).param("param1", json), response.getOutputStream());
}
}
libraries-4/src/test/java/com/baeldung/distinct/DistinctWithEclipseCollectionsUnitTest.java
-32
View File
@@ -1,32 +0,0 @@
package com.baeldung.distinct;
import static org.junit.Assert.assertTrue;
import java.util.List;
import org.eclipse.collections.impl.block.factory.HashingStrategies;
import org.eclipse.collections.impl.utility.ListIterate;
import org.junit.Before;
import org.junit.Test;
public class DistinctWithEclipseCollectionsUnitTest {
List<Person> personList;
@Before
public void init() {
personList = PersonDataGenerator.getPersonListWithFakeValues();
}
@Test
public void whenFilterListByName_thenSizeShouldBe4() {
List<Person> personListFiltered = ListIterate.distinct(personList, HashingStrategies.fromFunction(Person::getName));
assertTrue(personListFiltered.size() == 4);
}
@Test
public void whenFilterListByAge_thenSizeShouldBe2() {
List<Person> personListFiltered = ListIterate.distinct(personList, HashingStrategies.fromIntFunction(Person::getAge));
assertTrue(personListFiltered.size() == 2);
}
}
libraries-4/src/test/java/com/baeldung/distinct/DistinctWithJavaFunctionUnitTest.java
-38
View File
@@ -1,38 +0,0 @@
package com.baeldung.distinct;
import static org.junit.Assert.assertTrue;
import static com.baeldung.distinct.DistinctWithJavaFunction.distinctByKey;
import java.util.List;
import java.util.stream.Collectors;
import org.junit.Before;
import org.junit.Test;
public class DistinctWithJavaFunctionUnitTest {
List<Person> personList;
@Before
public void init() {
personList = PersonDataGenerator.getPersonListWithFakeValues();
}
@Test
public void whenFilterListByName_thenSizeShouldBe4() {
List<Person> personListFiltered = personList.stream().filter(distinctByKey(p -> p.getName())).collect(Collectors.toList());
assertTrue(personListFiltered.size() == 4);
}
@Test
public void whenFilterListByAge_thenSizeShouldBe2() {
List<Person> personListFiltered = personList.stream().filter(distinctByKey(p -> p.getAge())).collect(Collectors.toList());
assertTrue(personListFiltered.size() == 2);
}
@Test
public void whenFilterListWithDefaultDistinct_thenSizeShouldBe5() {
List<Person> personListFiltered = personList.stream().distinct().collect(Collectors.toList());
assertTrue(personListFiltered.size() == 5);
}
}
libraries-4/src/test/java/com/baeldung/distinct/DistinctWithStreamexUnitTest.java
-32
View File
@@ -1,32 +0,0 @@
package com.baeldung.distinct;
import static org.junit.Assert.assertTrue;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import one.util.streamex.StreamEx;
public class DistinctWithStreamexUnitTest {
List<Person> personList;
@Before
public void init() {
personList = PersonDataGenerator.getPersonListWithFakeValues();
}
@Test
public void whenFilterListByName_thenSizeShouldBe4() {
List<Person> personListFiltered = StreamEx.of(personList).distinct(Person::getName).toList();
assertTrue(personListFiltered.size() == 4);
}
@Test
public void whenFilterListByAge_thenSizeShouldBe2() {
List<Person> personListFiltered = StreamEx.of(personList).distinct(Person::getAge).toList();
assertTrue(personListFiltered.size() == 2);
}
}
libraries-4/src/test/java/com/baeldung/distinct/DistinctWithVavrUnitTest.java
-30
View File
@@ -1,30 +0,0 @@
package com.baeldung.distinct;
import static org.junit.Assert.assertTrue;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
public class DistinctWithVavrUnitTest {
List<Person> personList;
@Before
public void init() {
personList = PersonDataGenerator.getPersonListWithFakeValues();
}
@Test
public void whenFilterListByName_thenSizeShouldBe4() {
List<Person> personListFiltered = io.vavr.collection.List.ofAll(personList).distinctBy(Person::getName).toJavaList();
assertTrue(personListFiltered.size() == 4);
}
@Test
public void whenFilterListByAge_thenSizeShouldBe2() {
List<Person> personListFiltered = io.vavr.collection.List.ofAll(personList).distinctBy(Person::getAge).toJavaList();
assertTrue(personListFiltered.size() == 2);
}
}
libraries-4/src/test/java/com/baeldung/distinct/PersonDataGenerator.java
-19
View File
@@ -1,19 +0,0 @@
package com.baeldung.distinct;
import java.util.Arrays;
import java.util.List;
public class PersonDataGenerator {
public static List<Person> getPersonListWithFakeValues() {
// @formatter:off
return Arrays.asList(
new Person(20, "Jhon", "[email protected]"),
new Person(20, "Jhon", "[email protected]"),
new Person(20, "Jhon", "[email protected]"),
new Person(21, "Tom", "[email protected]"),
new Person(21, "Mark", "[email protected]"),
new Person(20, "Julia", "[email protected]"));
// @formatter:on
}
}