net.ftlines.wicket.validation.bean.ReflectableProperty.java Source code

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Here is the source code for net.ftlines.wicket.validation.bean.ReflectableProperty.java

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/**
 * 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 net.ftlines.wicket.validation.bean;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

import org.apache.wicket.model.IPropertyReflectionAwareModel;

/**
 * {@link IProperty} implementation based on a {@link Field} or a getter or setter a {@link Method}
 * 
 * @author igor
 * 
 */
public class ReflectableProperty implements IProperty {
    private String name;
    private ClassReference<?> containerType;

    /**
     * Constructs a property based on a field
     * 
     * @param field
     */
    public ReflectableProperty(Field field) {
        init(field);
    }

    private void init(Field field) {
        name = field.getName();
        containerType = ClassReference.of(field.getDeclaringClass());
    }

    /**
     * Constructs a property based on a getter or a setter method
     * 
     * @param field
     */
    public ReflectableProperty(Method method) {
        init(method);
    }

    private void init(Method method) {
        if (method.getName().startsWith("get") && method.getName().length() > 3) {
            name = method.getName();
            name = name.substring(3, 4).toLowerCase() + (name.length() > 4 ? name.substring(4) : "");
            containerType = ClassReference.of(method.getDeclaringClass());
        } else if (method.getName().startsWith("set") && method.getName().length() > 3
                && method.getParameterTypes().length == 1) {
            name = method.getName();
            name = name.substring(3, 4).toLowerCase() + (name.length() > 4 ? name.substring(4) : "");
            containerType = ClassReference.of(method.getDeclaringClass());
        } else {
            throw new IllegalArgumentException("Method: " + method + " is neither getter nor setter");
        }
    }

    /**
     * Creates a property based on a {@link IPropertyReflectionAwareModel} model
     * 
     * @param model
     */
    public ReflectableProperty(IPropertyReflectionAwareModel model) {
        if (model.getPropertyGetter() != null) {
            init(model.getPropertyGetter());
        } else if (model.getPropertySetter() != null) {
            init(model.getPropertySetter());
        } else {
            init(model.getPropertyField());
        }
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public Class<?> getContainerType() {
        return containerType.get();
    }

}