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/**
*
*/
package org.junit.experimental.theories.internal;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import org.junit.experimental.theories.ParameterSignature;
import org.junit.experimental.theories.ParameterSupplier;
import org.junit.experimental.theories.ParametersSuppliedBy;
import org.junit.experimental.theories.PotentialAssignment;
import org.junit.experimental.theories.PotentialAssignment.CouldNotGenerateValueException;
import org.junit.runners.model.TestClass;
/**
* A potentially incomplete list of value assignments for a method's formal
* parameters
*/
public class Assignments {
private List<PotentialAssignment> fAssigned;
private final List<ParameterSignature> fUnassigned;
private final TestClass fClass;
private Assignments(List<PotentialAssignment> assigned,
List<ParameterSignature> unassigned, TestClass testClass) {
fUnassigned= unassigned;
fAssigned= assigned;
fClass= testClass;
}
/**
* Returns a new assignment list for {@code testMethod}, with no params
* assigned.
*/
public static Assignments allUnassigned(Method testMethod,
TestClass testClass) throws Exception {
List<ParameterSignature> signatures;
signatures= ParameterSignature.signatures(testClass
.getOnlyConstructor());
signatures.addAll(ParameterSignature.signatures(testMethod));
return new Assignments(new ArrayList<PotentialAssignment>(),
signatures, testClass);
}
public boolean isComplete() {
return fUnassigned.size() == 0;
}
public ParameterSignature nextUnassigned() {
return fUnassigned.get(0);
}
public Assignments assignNext(PotentialAssignment source) {
List<PotentialAssignment> assigned= new ArrayList<PotentialAssignment>(
fAssigned);
assigned.add(source);
return new Assignments(assigned, fUnassigned.subList(1, fUnassigned
.size()), fClass);
}
public Object[] getActualValues(int start, int stop, boolean nullsOk)
throws CouldNotGenerateValueException {
Object[] values= new Object[stop - start];
for (int i= start; i < stop; i++) {
Object value= fAssigned.get(i).getValue();
if (value == null && !nullsOk)
throw new CouldNotGenerateValueException();
values[i - start]= value;
}
return values;
}
public List<PotentialAssignment> potentialsForNextUnassigned()
throws InstantiationException, IllegalAccessException {
ParameterSignature unassigned= nextUnassigned();
return getSupplier(unassigned).getValueSources(unassigned);
}
public ParameterSupplier getSupplier(ParameterSignature unassigned)
throws InstantiationException, IllegalAccessException {
ParameterSupplier supplier= getAnnotatedSupplier(unassigned);
if (supplier != null)
return supplier;
return new AllMembersSupplier(fClass);
}
public ParameterSupplier getAnnotatedSupplier(ParameterSignature unassigned)
throws InstantiationException, IllegalAccessException {
ParametersSuppliedBy annotation= unassigned
.findDeepAnnotation(ParametersSuppliedBy.class);
if (annotation == null)
return null;
return annotation.value().newInstance();
}
public Object[] getConstructorArguments(boolean nullsOk)
throws CouldNotGenerateValueException {
return getActualValues(0, getConstructorParameterCount(), nullsOk);
}
public Object[] getMethodArguments(boolean nullsOk)
throws CouldNotGenerateValueException {
return getActualValues(getConstructorParameterCount(),
fAssigned.size(), nullsOk);
}
public Object[] getAllArguments(boolean nullsOk)
throws CouldNotGenerateValueException {
return getActualValues(0, fAssigned.size(), nullsOk);
}
private int getConstructorParameterCount() {
List<ParameterSignature> signatures= ParameterSignature
.signatures(fClass.getOnlyConstructor());
int constructorParameterCount= signatures.size();
return constructorParameterCount;
}
public Object[] getArgumentStrings(boolean nullsOk)
throws CouldNotGenerateValueException {
Object[] values= new Object[fAssigned.size()];
for (int i= 0; i < values.length; i++) {
values[i]= fAssigned.get(i).getDescription();
}
return values;
}
}
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