/*
 * Copyright 2005-2010 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.wamblee.reflection;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.List;

import org.junit.Test;

import static junit.framework.TestCase.*; 

public class AnnotationUtilsTest {
    
    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.FIELD, ElementType.METHOD})
    public static @interface MyAnnotation { 
        
    }
    
    public static class X1 { 
        @MyAnnotation
        public int x; 
    }
    
    public static class X2 { 
        @MyAnnotation
        private int x;
        
    }

    public static class X3 { 
        private int x;
        
        public void setX(int aX) {
            x = aX;
        }
        
        @MyAnnotation
        public int getX() {
            return x;
        }
    }
    
    public static class X4 { 
        private int x;
        
        private void setX(int aX) {
            x = aX;
        }
        
        @MyAnnotation
        private int getX() {
            return x;
        }
    }

    public static class X5 { 
        private int x;
        
        @MyAnnotation
        private int y; 
        
        private void setX(int aX) {
            x = aX;
        }
        
        @MyAnnotation
        private int getX() {
            return x;
        }
    }


    
    @Test
    public void testPublicField() {
        List<Accessor> accessors = AnnotationUtils.analyse(X1.class, MyAnnotation.class);
        assertEquals(1, accessors.size());
        assertTrue(accessors.get(0) instanceof FieldAccessor);

        X1 obj = new X1();
        assertEquals(0, obj.x);
        accessors.get(0).set(obj, 100);
        assertEquals(100,obj.x);
    }
    
    @Test
    public void testPrivateField() { 
        List<Accessor> accessors = AnnotationUtils.analyse(X2.class, MyAnnotation.class);
        assertEquals(1, accessors.size());
        assertTrue(accessors.get(0) instanceof FieldAccessor);
        X2 obj = new X2();
        assertEquals(0, obj.x);
        accessors.get(0).set(obj, 100);
        assertEquals(100, obj.x);
    }
    
    @Test
    public void testPublicProperty() { 
        List<Accessor> accessors = AnnotationUtils.analyse(X3.class, MyAnnotation.class);
        assertEquals(1, accessors.size());
        assertTrue(accessors.get(0) instanceof PropertyAccessor);
        X3 obj = new X3();
        assertEquals(0, obj.x);
        accessors.get(0).set(obj, 100);
        assertEquals(100, obj.x);
    }
    
    @Test
    public void testPrivateProperty() { 
        List<Accessor> accessors = AnnotationUtils.analyse(X4.class, MyAnnotation.class);
        assertEquals(1, accessors.size());
        assertTrue(accessors.get(0) instanceof PropertyAccessor);
        X4 obj = new X4();
        assertEquals(0, obj.x);
        accessors.get(0).set(obj, 100);
        assertEquals(100, obj.x);
    }
    
    @Test
    public void testMultipleMatches() { 
        List<Accessor> accessors = AnnotationUtils.analyse(X5.class, MyAnnotation.class);
        assertEquals(2, accessors.size());
        X5 obj = new X5();
        assertEquals(0, obj.x);
        assertEquals(0, obj.y);
        for (Accessor accessor: accessors) { 
            accessor.set(obj, 100);
        }
        assertEquals(100, obj.x);
        assertEquals(100, obj.y);
    }
}