org.metricssampler.util.Preconditions Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of metrics-sampler-core Show documentation
The newest version!
package org.metricssampler.util;

import java.util.Collection;
import java.util.Optional;

public final class Preconditions {
	private Preconditions() {
	}
	
	public static void checkArgumentNotNullNorEmpty(final String argument, final String name) throws IllegalArgumentException {
		if (argument == null) {
			throw new IllegalArgumentException("Argument \"" + name + "\" may not be null");
		}
		if (argument.equals("")) {
			throw new IllegalArgumentException("Argument \"" + name + "\" may not be an empty string");
		}
	}
	
	public static void checkArgumentNotNull(final Object argument, final String name) throws IllegalArgumentException {
		if (argument == null) {
			throw new IllegalArgumentException("Argument \"" + name + "\" may not be null");
		}
	}
	
	public static void checkArgumentNotNullNorEmpty(final Collection argument, final String name) throws IllegalArgumentException {
		if (argument == null) {
			throw new IllegalArgumentException("Argument \"" + name + "\" may not be null");
		}
		if (argument.isEmpty()) {
			throw new IllegalArgumentException("Argument \"" + name + "\" may not be empty");
		}
	}
	
	public static void checkArgument(final boolean condition, final String msg) throws IllegalArgumentException {
		if (!condition) {
			throw new IllegalArgumentException(msg);
		}
	}
	
	public static void checkStateNull(final Object property, final String name) throws IllegalArgumentException {
		if (property != null) {
			throw new IllegalStateException("Property \"" + name + "\" must be null");
		}
	}
	
	public static void checkStateNotNull(final Object property, final String name) throws IllegalArgumentException {
		if (property == null) {
			throw new IllegalStateException("Property \"" + name + "\" may not be null");
		}
	}

	public static void checkArgumentPresent(final Optional argument, final String name) throws IllegalArgumentException {
		if (!argument.isPresent()) {
			throw new IllegalArgumentException("Argument \"" + name + "\" may not be null");
		}
	}
}