com.redhat.lightblue.metadata.DocId Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of lightblue-core-metadata Show documentation
There is a newer version: 2.18.0
Show newest version
/*
 Copyright 2013 Red Hat, Inc. and/or its affiliates.

 This file is part of lightblue.

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see .
 */
package com.redhat.lightblue.metadata;

import java.io.Serializable;

import java.util.Arrays;

/**
 * This class is used to represent document identities. It encapsulates an array
 * of values that represent the values of the identity fields of a document and
 * the objectType.
 */
public final class DocId implements Serializable {

    private static final long serialVersionUID = 1l;

    /**
     * Array of all identity fields AND the objectType field.
     */
    private final Object[] values;

    /**
     * Index to the objectType field in the values array.
     */
    private final int objectTypeIx;

    public DocId(Object[] values, int objectTypeIx) {
        this.values = values;
        this.objectTypeIx = objectTypeIx;
    }

    public String getObjectType() {
        return values[objectTypeIx].toString();
    }

    public Object getValue(int ix) {
        return values[ix];
    }

    public int getSize() {
        return values.length;
    }

    @Override
    public int hashCode() {
        int value = 1;
        for (Object x : values) {
            if (x != null) {
                value *= x.hashCode();
            }
        }
        return value;
    }

    @Override
    public boolean equals(Object x) {
        if (x instanceof DocId) {
            DocId d = (DocId) x;
            if (d.values.length == values.length) {
                for (int i = 0; i < values.length; i++) {
                    if (!(values[i] == null && d.values[i] == null)
                            && !(values[i] != null && d.values[i] != null && d.values[i].equals(values[i]))) {
                        return false;
                    }
                }
                return true;
            }
        }
        return false;
    }

    @Override
    public String toString() {
        return Arrays.toString(values);
    }
}