64 lines
1.3 KiB
Java
64 lines
1.3 KiB
Java
package jdocs.stream;
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import akka.actor.ActorRef;
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import java.util.function.Predicate;
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/**
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* Acts as if `System.out.println()` yet swallows all messages. Useful for putting printlines in examples yet without poluting the build with them.
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*/
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public class SilenceSystemOut {
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private SilenceSystemOut() {
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}
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public static System get() {
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return new System(new System.Println() {
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@Override
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public void println(String s) {
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// ignore
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}
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});
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}
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public static System get(ActorRef probe) {
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return new System(new System.Println() {
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@Override
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public void println(String s) {
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probe.tell(s, ActorRef.noSender());
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}
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});
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}
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public static System get(Predicate<String> filter, ActorRef probe) {
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return new System(new System.Println() {
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@Override
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public void println(String s) {
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if (filter.test(s))
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probe.tell(s, ActorRef.noSender());
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}
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});
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}
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public static class System {
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public final Println out;
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public System(Println out) {
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this.out = out;
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}
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public static abstract class Println {
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public abstract void println(String s);
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public void println(Object s) {
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println(s.toString());
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}
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public void printf(String format, Object... args) {
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println(String.format(format, args));
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}
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}
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}
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}
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