uno.informatics.common.Mapping Maven / Gradle / Ivy

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/*******************************************************************************
 * Copyright 2016 Guy Davenport
 *
 * 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 uno.informatics.common;

import org.apache.commons.lang3.ObjectUtils;

public class Mapping {
    private static final String MAPPING_LABEL = Mapping.class.getName() + ".mappingLabel";
    private static final String NULL_LABEL = Mapping.class.getName() + ".nullLabel";

    private F from;
    private T to;

    public Mapping(F from, T to) {
        super();
        this.from = from;
        this.to = to;
    }

    public final F getFrom() {
        return from;
    }

    public final void setFrom(F from) {
        this.from = from;
    }

    public final T getTo() {
        return to;
    }

    public final void setTo(T to) {
        this.to = to;
    }

    @SuppressWarnings("unchecked")
    @Override
    public boolean equals(Object object) {
        if (object instanceof Mapping)
            return ObjectUtils.equals(getFrom(), ((Mapping) object).getFrom())
                && ObjectUtils.equals(getTo(), ((Mapping) object).getTo());
        else
            return false;
    }

    @Override
    public String toString() {
        return getFromLabel(from) + PropertyUtils.getInstance().getString(MAPPING_LABEL) + getToLabel(to);
    }

    protected String getFromLabel(F from) {
        return from != null ? from.toString() : PropertyUtils.getInstance().getString(NULL_LABEL);
    }

    protected String getToLabel(T to) {
        return to != null ? to.toString() : PropertyUtils.getInstance().getString(NULL_LABEL);
    }
}