src/main/java/org/yaml/snakeyaml/introspector/MethodProperty.java

/**
 * Copyright (c) 2008-2010 Andrey Somov
 *
 * 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.yaml.snakeyaml.introspector;

import java.beans.PropertyDescriptor;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.yaml.snakeyaml.error.YAMLException;

public class MethodProperty extends Property {
    private final PropertyDescriptor property;

    public MethodProperty(PropertyDescriptor property) {
        super(property.getName(), property.getPropertyType());
        this.property = property;
    }

    @Override
    public void set(Object object, Object value) throws Exception {
        property.getWriteMethod().invoke(object, value);
    }

    @SuppressWarnings("unchecked")
    @Override
    public Type[] getActualTypeArguments() {
        if (List.class.isAssignableFrom(property.getPropertyType())
                || Set.class.isAssignableFrom(property.getPropertyType())
                || Map.class.isAssignableFrom(property.getPropertyType())) {
            if (property.getReadMethod().getGenericReturnType() instanceof ParameterizedType) {
                ParameterizedType grt = (ParameterizedType) property.getReadMethod()
                        .getGenericReturnType();
                Type[] result = grt.getActualTypeArguments();
                if (result == null || (result[0] instanceof TypeVariable)
                        || (result[0] instanceof ParameterizedType)) {
                    return null;
                } else {
                    return result;
                }
            } else {
                return null;
            }
        } else {
            return null;
        }
    }

    @Override
    public Object get(Object object) {
        try {
            property.getReadMethod().setAccessible(true);// issue 50
            return property.getReadMethod().invoke(object);
        } catch (Exception e) {
            throw new YAMLException("Unable to find getter for property '" + property.getName()
                    + "' on object " + object + ":" + e);
        }
    }
}