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Add JMH dependency and shade the jar. Include examples to avoid contains() case insensitive behavior

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Cavero Barca 2020-01-15 00:21:50 +01:00
parent 54582f10f7
commit 69a029f4ed
2 changed files with 122 additions and 2 deletions
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40
core-java-modules/core-java-string-operations-2/pom.xml
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@ -1,6 +1,7 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>core-java-string-operations-2</artifactId>
<version>0.1.0-SNAPSHOT</version>
@ -51,6 +52,18 @@
<version>${org.hamcrest.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>${jmh-core.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-generator-annprocess</artifactId>
<version>${jmh-generator.version}</version>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
@ -61,6 +74,29 @@
<build>
<finalName>core-java-string-operations-2</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.2.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>org.openjdk.jmh.Main</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources</directory>

84
core-java-modules/core-java-string-operations-2/src/main/java/com/baeldung/containscaseinsensitive/ContainsWorkarounds.java Normal file
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@ -0,0 +1,84 @@
package com.baeldung.containscaseinsensitive;
import java.util.concurrent.TimeUnit;
import java.util.regex.Pattern;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
/**
* Based on https://github.com/tedyoung/indexof-contains-benchmark
*/
@Fork(5)
@State(Scope.Benchmark)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public class ContainsWorkarounds {
private String src;
private String dest;
private Pattern pattern;
public static void main(String[] args) throws Exception {
org.openjdk.jmh.Main.main(args);
}
@Setup
public void setup() {
src = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum";
dest = "eiusmod";
pattern = Pattern.compile(Pattern.quote(dest), Pattern.CASE_INSENSITIVE);
}
// toLowerCase() and contains()
@Benchmark
public boolean lowerCaseContains() {
return src.toLowerCase()
.contains(dest.toLowerCase());
}
// matches() with Regular Expressions
@Benchmark
public boolean matchesRegularExpression() {
return src.matches("(?i).*" + dest + ".*");
}
// String regionMatches()
@Benchmark
public boolean regionMatches() {
final char firstLo = Character.toLowerCase(dest.charAt(0));
final char firstUp = Character.toUpperCase(dest.charAt(0));
for (int i = src.length() - dest.length(); i >= 0; i--) {
final char ch = src.charAt(i);
if (ch != firstLo && ch != firstUp)
continue;
if (src.regionMatches(true, i, dest, 0, dest.length()))
return true;
}
return false;
}
// Pattern CASE_INSENSITIVE with regexp
@Benchmark
public boolean patternCaseInsensitiveRegexp() {
return pattern.matcher(src)
.find();
}
// Apache Commons StringUtils containsIgnoreCase
@Benchmark
public boolean apacheCommonsStringUtils() {
return org.apache.commons.lang3.StringUtils.containsIgnoreCase(src, dest);
}
}