org.ow2.petals.probes.api.key.StringArrayProbeKey Maven / Gradle / Ivy

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/**
 * Copyright (c) 2016 Linagora
 * 
 * This program/library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 2.1 of the License, or (at your
 * option) any later version.
 * 
 * This program/library 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 Lesser General Public License
 * for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program/library; If not, see http://www.gnu.org/licenses/
 * for the GNU Lesser General Public License version 2.1.
 */
package org.ow2.petals.probes.api.key;

import java.util.Arrays;

/**
 * A {@link ProbeKey} implementation using a {@link String} array internally and taking care of common concerns such as
 * optimisation, toString or equals/hashCode.
 * 
 * @author Victor Noel
 *
 */
public class StringArrayProbeKey implements ProbeKey {

    /**
     * For optimization reason, the string representation of the ServiceClientKey is computed at constructor level as it
     * is immutable, and not each time it is needed.
     */
    private final String[] keyAsStringArray;

    public StringArrayProbeKey(String... keys) {
        assert keys.length > 0;
        keyAsStringArray = keys.clone();
    }

    @Override
    public String[] toStringArray() {
        return keyAsStringArray.clone();
    }

    @Override
    public String toReadableString() {
        if (keyAsStringArray.length == 1) {
            return keyAsStringArray[0];
        } else {
            return Arrays.toString(keyAsStringArray);
        }
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + Arrays.hashCode(keyAsStringArray);
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        StringArrayProbeKey other = (StringArrayProbeKey) obj;
        if (!Arrays.equals(keyAsStringArray, other.keyAsStringArray))
            return false;
        return true;
    }
}