[JAVA-22519] Created new module libraries-stream and added 5 articles (#15403)
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panos-kakos
@@ -1,15 +0,0 @@
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package com.baeldung.distinct;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.function.Function;
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import java.util.function.Predicate;
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public class DistinctWithJavaFunction {
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public static <T> Predicate<T> distinctByKey(Function<? super T, ?> keyExtractor) {
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Map<Object, Boolean> seen = new ConcurrentHashMap<>();
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return t -> seen.putIfAbsent(keyExtractor.apply(t), Boolean.TRUE) == null;
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}
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}
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@@ -1,65 +0,0 @@
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package com.baeldung.distinct;
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public class Person {
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int age;
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String name;
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String email;
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public Person(int age, String name, String email) {
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super();
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this.age = age;
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this.name = name;
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this.email = email;
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}
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public int getAge() {
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return age;
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}
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public String getName() {
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return name;
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}
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public String getEmail() {
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return email;
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}
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@Override
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public String toString() {
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StringBuilder builder = new StringBuilder();
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builder.append("Person [age=");
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builder.append(age);
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builder.append(", name=");
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builder.append(name);
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builder.append(", email=");
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builder.append(email);
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builder.append("]");
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return builder.toString();
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}
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@Override
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public int hashCode() {
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final int prime = 31;
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int result = 1;
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result = prime * result + ((email == null) ? 0 : email.hashCode());
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return result;
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj)
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return true;
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if (obj == null)
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return false;
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if (getClass() != obj.getClass())
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return false;
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Person other = (Person) obj;
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if (email == null) {
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if (other.email != null)
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return false;
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} else if (!email.equals(other.email))
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return false;
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return true;
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}
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}
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@@ -1,48 +0,0 @@
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/*
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* To change this license header, choose License Headers in Project Properties.
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* To change this template file, choose Tools | Templates
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* and open the template in the editor.
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*/
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package com.baeldung.yarg;
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import com.haulmont.yarg.formatters.factory.DefaultFormatterFactory;
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import com.haulmont.yarg.loaders.factory.DefaultLoaderFactory;
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import com.haulmont.yarg.loaders.impl.JsonDataLoader;
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import com.haulmont.yarg.reporting.Reporting;
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import com.haulmont.yarg.reporting.RunParams;
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import com.haulmont.yarg.structure.Report;
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import com.haulmont.yarg.structure.ReportBand;
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import com.haulmont.yarg.structure.ReportOutputType;
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import com.haulmont.yarg.structure.impl.BandBuilder;
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import com.haulmont.yarg.structure.impl.ReportBuilder;
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import com.haulmont.yarg.structure.impl.ReportTemplateBuilder;
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import java.io.File;
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import java.io.IOException;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.commons.io.FileUtils;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestMethod;
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import org.springframework.web.bind.annotation.RestController;
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@RestController
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public class DocumentController {
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@RequestMapping(path = "/generate/doc", method = RequestMethod.GET)
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public void generateDocument(HttpServletResponse response) throws IOException {
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ReportBuilder reportBuilder = new ReportBuilder();
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ReportTemplateBuilder reportTemplateBuilder = new ReportTemplateBuilder().documentPath("./src/main/resources/Letter.docx").documentName("Letter.docx").outputType(ReportOutputType.docx).readFileFromPath();
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reportBuilder.template(reportTemplateBuilder.build());
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BandBuilder bandBuilder = new BandBuilder();
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String json = FileUtils.readFileToString(new File("./src/main/resources/Data.json"));
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ReportBand main = bandBuilder.name("Main").query("Main", "parameter=param1 $.main", "json").build();
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reportBuilder.band(main);
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Report report = reportBuilder.build();
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Reporting reporting = new Reporting();
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reporting.setFormatterFactory(new DefaultFormatterFactory());
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reporting.setLoaderFactory(new DefaultLoaderFactory().setJsonDataLoader(new JsonDataLoader()));
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response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
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reporting.runReport(new RunParams(report).param("param1", json), response.getOutputStream());
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}
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}
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-32
@@ -1,32 +0,0 @@
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package com.baeldung.distinct;
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import static org.junit.Assert.assertTrue;
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import java.util.List;
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import org.eclipse.collections.impl.block.factory.HashingStrategies;
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import org.eclipse.collections.impl.utility.ListIterate;
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import org.junit.Before;
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import org.junit.Test;
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public class DistinctWithEclipseCollectionsUnitTest {
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List<Person> personList;
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@Before
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public void init() {
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personList = PersonDataGenerator.getPersonListWithFakeValues();
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}
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@Test
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public void whenFilterListByName_thenSizeShouldBe4() {
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List<Person> personListFiltered = ListIterate.distinct(personList, HashingStrategies.fromFunction(Person::getName));
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assertTrue(personListFiltered.size() == 4);
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}
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@Test
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public void whenFilterListByAge_thenSizeShouldBe2() {
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List<Person> personListFiltered = ListIterate.distinct(personList, HashingStrategies.fromIntFunction(Person::getAge));
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assertTrue(personListFiltered.size() == 2);
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}
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}
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@@ -1,38 +0,0 @@
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package com.baeldung.distinct;
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import static org.junit.Assert.assertTrue;
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import static com.baeldung.distinct.DistinctWithJavaFunction.distinctByKey;
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import java.util.List;
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import java.util.stream.Collectors;
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import org.junit.Before;
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import org.junit.Test;
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public class DistinctWithJavaFunctionUnitTest {
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List<Person> personList;
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@Before
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public void init() {
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personList = PersonDataGenerator.getPersonListWithFakeValues();
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}
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@Test
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public void whenFilterListByName_thenSizeShouldBe4() {
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List<Person> personListFiltered = personList.stream().filter(distinctByKey(p -> p.getName())).collect(Collectors.toList());
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assertTrue(personListFiltered.size() == 4);
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}
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@Test
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public void whenFilterListByAge_thenSizeShouldBe2() {
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List<Person> personListFiltered = personList.stream().filter(distinctByKey(p -> p.getAge())).collect(Collectors.toList());
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assertTrue(personListFiltered.size() == 2);
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}
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@Test
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public void whenFilterListWithDefaultDistinct_thenSizeShouldBe5() {
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List<Person> personListFiltered = personList.stream().distinct().collect(Collectors.toList());
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assertTrue(personListFiltered.size() == 5);
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}
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}
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@@ -1,32 +0,0 @@
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package com.baeldung.distinct;
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import static org.junit.Assert.assertTrue;
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import java.util.List;
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import org.junit.Before;
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import org.junit.Test;
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import one.util.streamex.StreamEx;
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public class DistinctWithStreamexUnitTest {
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List<Person> personList;
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@Before
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public void init() {
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personList = PersonDataGenerator.getPersonListWithFakeValues();
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}
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@Test
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public void whenFilterListByName_thenSizeShouldBe4() {
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List<Person> personListFiltered = StreamEx.of(personList).distinct(Person::getName).toList();
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assertTrue(personListFiltered.size() == 4);
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}
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@Test
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public void whenFilterListByAge_thenSizeShouldBe2() {
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List<Person> personListFiltered = StreamEx.of(personList).distinct(Person::getAge).toList();
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assertTrue(personListFiltered.size() == 2);
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}
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}
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@@ -1,30 +0,0 @@
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package com.baeldung.distinct;
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import static org.junit.Assert.assertTrue;
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import java.util.List;
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import org.junit.Before;
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import org.junit.Test;
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public class DistinctWithVavrUnitTest {
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List<Person> personList;
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@Before
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public void init() {
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personList = PersonDataGenerator.getPersonListWithFakeValues();
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}
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@Test
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public void whenFilterListByName_thenSizeShouldBe4() {
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List<Person> personListFiltered = io.vavr.collection.List.ofAll(personList).distinctBy(Person::getName).toJavaList();
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assertTrue(personListFiltered.size() == 4);
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}
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@Test
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public void whenFilterListByAge_thenSizeShouldBe2() {
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List<Person> personListFiltered = io.vavr.collection.List.ofAll(personList).distinctBy(Person::getAge).toJavaList();
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assertTrue(personListFiltered.size() == 2);
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}
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}
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@@ -1,19 +0,0 @@
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package com.baeldung.distinct;
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import java.util.Arrays;
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import java.util.List;
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public class PersonDataGenerator {
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public static List<Person> getPersonListWithFakeValues() {
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// @formatter:off
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return Arrays.asList(
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new Person(20, "Jhon", "jhon@test.com"),
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new Person(20, "Jhon", "jhon1@test.com"),
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new Person(20, "Jhon", "jhon2@test.com"),
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new Person(21, "Tom", "Tom@test.com"),
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new Person(21, "Mark", "Mark@test.com"),
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new Person(20, "Julia", "jhon@test.com"));
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// @formatter:on
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}
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}
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