AssignableFromFieldTypeMatcherStrategy.java

/*
 * Copyright 2008 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.powermock.reflect.internal.matcherstrategies;

import org.powermock.reflect.exceptions.FieldNotFoundException;
import org.powermock.reflect.internal.primitivesupport.PrimitiveWrapper;

import java.lang.reflect.Field;

public class AssignableFromFieldTypeMatcherStrategy extends FieldTypeMatcherStrategy {

	private final Class<?> primitiveCounterpart;

	public AssignableFromFieldTypeMatcherStrategy(Class<?> fieldType) {
		super(fieldType);
		primitiveCounterpart = PrimitiveWrapper.getPrimitiveFromWrapperType(expectedFieldType);
	}

	@Override
	public boolean matches(Field field) {
		Class<?> actualFieldType = field.getType();
		return actualFieldType.isAssignableFrom(expectedFieldType)
				|| (primitiveCounterpart != null && actualFieldType.isAssignableFrom(primitiveCounterpart));
	}

	@Override
	public void notFound(Class<?> type, boolean isInstanceField) throws FieldNotFoundException {
		throw new FieldNotFoundException(String.format("No %s field assignable from \"%s\" could be found in the class hierarchy of %s.",
				isInstanceField ? "instance" : "static", expectedFieldType.getName(), type.getName()));
	}

	@Override
	public String toString() {
		return "type " + (primitiveCounterpart == null ? expectedFieldType.getName() : primitiveCounterpart.getName());
	}
}