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Java JDBC 4.0 (JRE 6+) driver for PostgreSQL database

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/*-------------------------------------------------------------------------
 *
 * Copyright (c) 2014, PostgreSQL Global Development Group
 *
 *
 *-------------------------------------------------------------------------
 */
package org.postgresql.hostchooser;

/**
 * Describes the required server type.
 */
public enum HostRequirement {
    any {
        public boolean allowConnectingTo(HostStatus status) {
            return status != HostStatus.ConnectFail;
        }
    },
    master {
        public boolean allowConnectingTo(HostStatus status) {
            return status == HostStatus.Master || status == HostStatus.ConnectOK;
        }
    },
    slave {
        public boolean allowConnectingTo(HostStatus status) {
            return status == HostStatus.Slave || status == HostStatus.ConnectOK;
        }
    },
    preferSlave {
        public boolean allowConnectingTo(HostStatus status) {
            return status != HostStatus.ConnectFail;
        }
    };

    public abstract boolean allowConnectingTo(HostStatus status);
}