org.hibernate.validator.testutil.ValidationXmlTestHelper Maven / Gradle / Ivy
/*
* Hibernate Validator, declare and validate application constraints
*
* License: Apache License, Version 2.0
* See the license.txt file in the root directory or .
*/
package org.hibernate.validator.testutil;
import java.io.InputStream;
/**
* Helps tests with using a specific file as {@code META-INF/validation.xml}.
*
* @author Gunnar Morling
*/
public class ValidationXmlTestHelper {
private final Class clazz;
/**
* Creates a new {@code ValidationXmlTestHelper}.
*
* @param clazz
* A class through which the specified {@code validation.xml} stand-in will be loaded.
*/
public ValidationXmlTestHelper(Class clazz) {
this.clazz = clazz;
}
/**
* Executes the given runnable, using the specified file as replacement for
* {@code META-INF/validation.xml}.
*
* @param validationXmlName The file to be used as validation.xml file.
* @param runnable The runnable to execute.
*/
public void runWithCustomValidationXml(final String validationXmlName, Runnable runnable) {
ClassLoader previousContextCl = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(
new ClassLoader( previousContextCl ) {
@Override
public InputStream getResourceAsStream(String name) {
if ( "META-INF/validation.xml".equals( name ) ) {
return clazz.getResourceAsStream( validationXmlName );
}
return super.getResourceAsStream( name );
}
}
);
runnable.run();
}
finally {
Thread.currentThread().setContextClassLoader( previousContextCl );
}
}
}