1 package junitparams.internal.parameters; 2 3 import java.util.List; 4 5 import org.junit.runners.model.FrameworkMethod; 6 7 import junitparams.FileParameters; 8 import junitparams.Parameters; 9 10 import static java.lang.String.*; 11 import static java.util.Arrays.*; 12 13 public class ParametersReader { 14 15 public static final String ILLEGAL_STATE_EXCEPTION_MESSAGE 16 = format("Illegal usage of JUnitParams in method %s. " + 17 "Check that you have only used one supported parameters evaluation strategy. " + 18 "Common case is to use both %s and %s annotations.", 19 "%s", Parameters.class, FileParameters.class); 20 21 private final FrameworkMethod frameworkMethod; 22 private final List<ParametrizationStrategy> strategies; 23 24 public ParametersReader(Class<?> testClass, FrameworkMethod frameworkMethod) { 25 this.frameworkMethod = frameworkMethod; 26 27 strategies = asList( 28 new ParametersFromCustomProvider(frameworkMethod), 29 new ParametersFromValue(frameworkMethod), 30 new ParametersFromExternalClassProvideMethod(frameworkMethod), 31 new ParametersFromExternalClassMethod(frameworkMethod), 32 new ParametersFromTestClassMethod(frameworkMethod, testClass) 33 ); 34 } 35 36 public Object[] read() { 37 boolean strategyAlreadyFound = false; 38 Object[] parameters = new Object[]{}; 39 40 for (ParametrizationStrategy strategy : strategies) { 41 if (strategy.isApplicable()) { 42 if (strategyAlreadyFound) { 43 illegalState(); 44 } 45 parameters = strategy.getParameters(); 46 strategyAlreadyFound = true; 47 } 48 } 49 return parameters; 50 } 51 52 private void illegalState() { 53 throw new IllegalStateException(format(ILLEGAL_STATE_EXCEPTION_MESSAGE, frameworkMethod.getName())); 54 } 55 } 56
