/*
 *JBoss, Home of Professional Open Source
 *
 *Copyright 2013 Red Hat, Inc. and/or its affiliates.
 *
 *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.picketlink.common.properties;

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

/**
 * Utility class for working with JavaBean style properties
 *
 * @see Property
 */
public class Properties {

    private Properties() {
    }

    /**
     * Create a JavaBean style property from the field
     *
     * @param <V>
     * @param field
     *
     * @return
     */
    public static <V> FieldProperty<V> createProperty(Field field) {
        return new FieldPropertyImpl<V>(field);
    }

    /**
     * Create a JavaBean style property from the specified method
     *
     * @param <V>
     * @param method
     *
     * @return
     *
     * @throws IllegalArgumentException if the method does not match JavaBean conventions
     * @see http://www.oracle.com/technetwork/java/javase/documentation/spec-136004.html
     */
    public static <V> MethodProperty<V> createProperty(Method method) {
        return new MethodPropertyImpl<V>(method);
    }

    /**
     * Create a JavaBean style property from the specified member
     *
     * @param <V>
     * @param member
     *
     * @return
     *
     * @throws IllegalArgumentException if the method does not match JavaBean conventions
     * @see http://www.oracle.com/technetwork/java/javase/documentation/spec-136004.html
     */
    public static <V> Property<V> createProperty(Member member) {
        if (member instanceof Method) {
            return new MethodPropertyImpl<V>(Method.class.cast(member));
        } else if (member instanceof Field) {
            return new FieldPropertyImpl<V>(Field.class.cast(member));
        } else {
            throw new IllegalArgumentException("Cannot make a property of " +
                    member + " - it is neither a method or a field");
        }
    }

    /**
     * Indicates whether this method is a valid property method.
     */
    public static <V> boolean isProperty(Method method) {
        try {
            new MethodPropertyImpl<V>(method);
            return true;
        } catch (IllegalArgumentException e) {
            return false;
        }
    }
}