eu.eubrazilcc.lvl.core.Sorting.java Source code

Introduction

Here is the source code for eu.eubrazilcc.lvl.core.Sorting.java

Source

/*
 * Copyright 2014 EUBrazilCC (EU?Brazil Cloud Connect)
 * 
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by 
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * 
 *   http://ec.europa.eu/idabc/eupl
 * 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and 
 * limitations under the Licence.
 * 
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */

package eu.eubrazilcc.lvl.core;

import static com.google.common.base.MoreObjects.toStringHelper;
import static com.google.common.base.Preconditions.checkArgument;
import static org.apache.commons.lang.StringUtils.isNotBlank;

import java.util.Objects;

/**
 * Sorting information.
 * @author Erik Torres <ertorser@upv.es>
 */
public class Sorting {

    private String field;
    private Order order;

    public Sorting() {
        setOrder(Order.ASC);
    }

    public String getField() {
        return field;
    }

    public void setField(final String field) {
        this.field = field;
    }

    public Order getOrder() {
        return order;
    }

    public void setOrder(final Order order) {
        this.order = order;
    }

    @Override
    public boolean equals(final Object obj) {
        if (obj == null || !(obj instanceof Sorting)) {
            return false;
        }
        final Sorting other = Sorting.class.cast(obj);
        return Objects.equals(field, other.field) && Objects.equals(order, other.order);
    }

    @Override
    public int hashCode() {
        return Objects.hash(field, order);
    }

    @Override
    public String toString() {
        return toStringHelper(this).add("field", field).add("order", order).toString();
    }

    /* Fluent API */

    public static Builder builder() {
        return new Builder();
    }

    public static class Builder {

        private final Sorting instance = new Sorting();

        public Builder field(final String field) {
            checkArgument(isNotBlank(field), "Uninitialized or invalid field");
            instance.setField(field);
            return this;
        }

        public Builder order(final Order order) {
            checkArgument(order != null, "Uninitialized order");
            instance.setOrder(order);
            return this;
        }

        public Sorting build() {
            return instance;
        }

    }

    /**
     * Sorting order.
     * @author Erik Torres <ertorser@upv.es>
     */
    public static enum Order {
        ASC, DESC
    }

}