src/javax/jmdns/ServiceInfo.java

// Copyright 2003-2005 Arthur van Hoff, Rick Blair
// Licensed under Apache License version 2.0
// Original license LGPL
package javax.jmdns;

import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.util.Enumeration;
import java.util.Map;

import javax.jmdns.impl.ServiceInfoImpl;

/**
 * <p>
 * The fully qualified service name is build using up to 5 components with the following structure:
 * 
 * <pre>
 *            &lt;app&gt;.&lt;protocol&gt;.&lt;servicedomain&gt;.&lt;parentdomain&gt;.<br/>
 * &lt;Instance&gt;.&lt;app&gt;.&lt;protocol&gt;.&lt;servicedomain&gt;.&lt;parentdomain&gt;.<br/>
 * &lt;sub&gt;._sub.&lt;app&gt;.&lt;protocol&gt;.&lt;servicedomain&gt;.&lt;parentdomain&gt;.
 * </pre>
 * 
 * <ol>
 * <li>&lt;servicedomain&gt;.&lt;parentdomain&gt;: This is the domain scope of the service typically "local.", but this can also be something similar to "in-addr.arpa." or "ip6.arpa."</li>
 * <li>&lt;protocol&gt;: This is either "_tcp" or "_udp"</li>
 * <li>&lt;app&gt;: This define the application protocol. Typical example are "_http", "_ftp", etc.</li>
 * <li>&lt;Instance&gt;: This is the service name</li>
 * <li>&lt;sub&gt;: This is the subtype for the application protocol</li>
 * </ol>
 * </p>
 */
public abstract class ServiceInfo implements Cloneable {

    /**
     * This is the no value text byte. According top the specification it is one byte with 0 value.
     */
    public static final byte[] NO_VALUE = new byte[0];

    /**
     * Fields for the fully qualified map.
     */
    public enum Fields {
        /**
         * Domain Field.
         */
        Domain,
        /**
         * Protocol Field.
         */
        Protocol,
        /**
         * Application Field.
         */
        Application,
        /**
         * Instance Field.
         */
        Instance,
        /**
         * Subtype Field.
         */
        Subtype
    }

    /**
     * Construct a service description for registering with JmDNS.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param port
     *            the local port on which the service runs
     * @param text
     *            string describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final int port, final String text) {
        return new ServiceInfoImpl(type, name, "", port, 0, 0, false, text);
    }

    /**
     * Construct a service description for registering with JmDNS.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param subtype
     *            service subtype see draft-cheshire-dnsext-dns-sd-06.txt chapter 7.1 Selective Instance Enumeration
     * @param port
     *            the local port on which the service runs
     * @param text
     *            string describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final String subtype, final int port, final String text) {
        return new ServiceInfoImpl(type, name, subtype, port, 0, 0, false, text);
    }

    /**
     * Construct a service description for registering with JmDNS.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param text
     *            string describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final int port, final int weight, final int priority, final String text) {
        return new ServiceInfoImpl(type, name, "", port, weight, priority, false, text);
    }

    /**
     * Construct a service description for registering with JmDNS.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param subtype
     *            service subtype see draft-cheshire-dnsext-dns-sd-06.txt chapter 7.1 Selective Instance Enumeration
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param text
     *            string describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final String subtype, final int port, final int weight, final int priority, final String text) {
        return new ServiceInfoImpl(type, name, subtype, port, weight, priority, false, text);
    }

    /**
     * Construct a service description for registering with JmDNS. The properties hashtable must map property names to either Strings or byte arrays describing the property values.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param props
     *            properties describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final int port, final int weight, final int priority, final Map<String, ?> props) {
        return new ServiceInfoImpl(type, name, "", port, weight, priority, false, props);
    }

    /**
     * Construct a service description for registering with JmDNS. The properties hashtable must map property names to either Strings or byte arrays describing the property values.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param subtype
     *            service subtype see draft-cheshire-dnsext-dns-sd-06.txt chapter 7.1 Selective Instance Enumeration
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param props
     *            properties describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final String subtype, final int port, final int weight, final int priority, final Map<String, ?> props) {
        return new ServiceInfoImpl(type, name, subtype, port, weight, priority, false, props);
    }

    /**
     * Construct a service description for registering with JmDNS.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param text
     *            bytes describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final int port, final int weight, final int priority, final byte[] text) {
        return new ServiceInfoImpl(type, name, "", port, weight, priority, false, text);
    }

    /**
     * Construct a service description for registering with JmDNS.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param subtype
     *            service subtype see draft-cheshire-dnsext-dns-sd-06.txt chapter 7.1 Selective Instance Enumeration
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param text
     *            bytes describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final String subtype, final int port, final int weight, final int priority, final byte[] text) {
        return new ServiceInfoImpl(type, name, subtype, port, weight, priority, false, text);
    }

    /**
     * Construct a service description for registering with JmDNS.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param persistent
     *            if <code>true</code> ServiceListener.resolveService will be called whenever new new information is received.
     * @param text
     *            string describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final int port, final int weight, final int priority, final boolean persistent, final String text) {
        return new ServiceInfoImpl(type, name, "", port, weight, priority, persistent, text);
    }

    /**
     * Construct a service description for registering with JmDNS.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param subtype
     *            service subtype see draft-cheshire-dnsext-dns-sd-06.txt chapter 7.1 Selective Instance Enumeration
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param persistent
     *            if <code>true</code> ServiceListener.resolveService will be called whenever new new information is received.
     * @param text
     *            string describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final String subtype, final int port, final int weight, final int priority, final boolean persistent, final String text) {
        return new ServiceInfoImpl(type, name, subtype, port, weight, priority, persistent, text);
    }

    /**
     * Construct a service description for registering with JmDNS. The properties hashtable must map property names to either Strings or byte arrays describing the property values.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param persistent
     *            if <code>true</code> ServiceListener.resolveService will be called whenever new new information is received.
     * @param props
     *            properties describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final int port, final int weight, final int priority, final boolean persistent, final Map<String, ?> props) {
        return new ServiceInfoImpl(type, name, "", port, weight, priority, persistent, props);
    }

    /**
     * Construct a service description for registering with JmDNS. The properties hashtable must map property names to either Strings or byte arrays describing the property values.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param subtype
     *            service subtype see draft-cheshire-dnsext-dns-sd-06.txt chapter 7.1 Selective Instance Enumeration
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param persistent
     *            if <code>true</code> ServiceListener.resolveService will be called whenever new new information is received.
     * @param props
     *            properties describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final String subtype, final int port, final int weight, final int priority, final boolean persistent, final Map<String, ?> props) {
        return new ServiceInfoImpl(type, name, subtype, port, weight, priority, persistent, props);
    }

    /**
     * Construct a service description for registering with JmDNS.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param persistent
     *            if <code>true</code> ServiceListener.resolveService will be called whenever new new information is received.
     * @param text
     *            bytes describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final int port, final int weight, final int priority, final boolean persistent, final byte[] text) {
        return new ServiceInfoImpl(type, name, "", port, weight, priority, persistent, text);
    }

    /**
     * Construct a service description for registering with JmDNS.
     * 
     * @param type
     *            fully qualified service type name, such as <code>_http._tcp.local.</code>.
     * @param name
     *            unqualified service instance name, such as <code>foobar</code>
     * @param subtype
     *            service subtype see draft-cheshire-dnsext-dns-sd-06.txt chapter 7.1 Selective Instance Enumeration
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param persistent
     *            if <code>true</code> ServiceListener.resolveService will be called whenever new new information is received.
     * @param text
     *            bytes describing the service
     * @return new service info
     */
    public static ServiceInfo create(final String type, final String name, final String subtype, final int port, final int weight, final int priority, final boolean persistent, final byte[] text) {
        return new ServiceInfoImpl(type, name, subtype, port, weight, priority, persistent, text);
    }

    /**
     * Construct a service description for registering with JmDNS. The properties hashtable must map property names to either Strings or byte arrays describing the property values.
     * 
     * @param qualifiedNameMap
     *            dictionary of values to build the fully qualified service name. Mandatory keys are Application and Instance. The Domain default is local, the Protocol default is tcp and the subtype default is none.
     * @param port
     *            the local port on which the service runs
     * @param weight
     *            weight of the service
     * @param priority
     *            priority of the service
     * @param persistent
     *            if <code>true</code> ServiceListener.resolveService will be called whenever new new information is received.
     * @param props
     *            properties describing the service
     * @return new service info
     */
    public static ServiceInfo create(final Map<Fields, String> qualifiedNameMap, final int port, final int weight, final int priority, final boolean persistent, final Map<String, ?> props) {
        return new ServiceInfoImpl(qualifiedNameMap, port, weight, priority, persistent, props);
    }

    /**
     * Returns true if the service info is filled with data.
     * 
     * @return <code>true</code> if the service info has data, <code>false</code> otherwise.
     */
    public abstract boolean hasData();

    /**
     * Fully qualified service type name, such as <code>_http._tcp.local.</code>
     * 
     * @return service type name
     */
    public abstract String getType();

    /**
     * Fully qualified service type name with the subtype if appropriate, such as <code>_printer._sub._http._tcp.local.</code>
     * 
     * @return service type name
     */
    public abstract String getTypeWithSubtype();

    /**
     * Unqualified service instance name, such as <code>foobar</code> .
     * 
     * @return service name
     */
    public abstract String getName();

    /**
     * The key is used to retrieve service info in hash tables.<br/>
     * The key is the lower case qualified name.
     * 
     * @return the key
     */
    public abstract String getKey();

    /**
     * Fully qualified service name, such as <code>foobar._http._tcp.local.</code> .
     * 
     * @return qualified service name
     */
    public abstract String getQualifiedName();

    /**
     * Get the name of the server.
     * 
     * @return server name
     */
    public abstract String getServer();

    /**
     * Returns the host IP address string in textual presentation.<br/>
     * <b>Note:</b> This can be either an IPv4 or an IPv6 representation.
     * 
     * @return the host raw IP address in a string format.
     * @deprecated since 3.2.3
     * @see #getHostAddresses()
     */
    @Deprecated
    public abstract String getHostAddress();

    /**
     * Returns the host IP addresses string in textual presentation.
     * 
     * @return list of host raw IP address in a string format.
     */
    public abstract String[] getHostAddresses();

    /**
     * Get the host address of the service.<br/>
     * 
     * @return host Internet address
     * @deprecated since 3.1.8
     * @see #getInetAddresses()
     */
    @Deprecated
    public abstract InetAddress getAddress();

    /**
     * Get the InetAddress of the service. This will return the IPv4 if it exist, otherwise it return the IPv6 if set.<br/>
     * <b>Note:</b> This return null if the service IP address cannot be resolved.
     * 
     * @return Internet address
     * @deprecated since 3.2.3
     * @see #getInetAddresses()
     */
    @Deprecated
    public abstract InetAddress getInetAddress();

    /**
     * Get the IPv4 InetAddress of the service.<br/>
     * <b>Note:</b> This return null if the service IPv4 address cannot be resolved.
     * 
     * @return Internet address
     * @deprecated since 3.2.3
     * @see #getInet4Addresses()
     */
    @Deprecated
    public abstract Inet4Address getInet4Address();

    /**
     * Get the IPv6 InetAddress of the service.<br/>
     * <b>Note:</b> This return null if the service IPv6 address cannot be resolved.
     * 
     * @return Internet address
     * @deprecated since 3.2.3
     * @see #getInet6Addresses()
     */
    @Deprecated
    public abstract Inet6Address getInet6Address();

    /**
     * Returns a list of all InetAddresses that can be used for this service.
     * <p>
     * In a multi-homed environment service info can be associated with more than one address.
     * </p>
     * 
     * @return list of InetAddress objects
     */
    public abstract InetAddress[] getInetAddresses();

    /**
     * Returns a list of all IPv4 InetAddresses that can be used for this service.
     * <p>
     * In a multi-homed environment service info can be associated with more than one address.
     * </p>
     * 
     * @return list of InetAddress objects
     */
    public abstract Inet4Address[] getInet4Addresses();

    /**
     * Returns a list of all IPv6 InetAddresses that can be used for this service.
     * <p>
     * In a multi-homed environment service info can be associated with more than one address.
     * </p>
     * 
     * @return list of InetAddress objects
     */
    public abstract Inet6Address[] getInet6Addresses();

    /**
     * Get the port for the service.
     * 
     * @return service port
     */
    public abstract int getPort();

    /**
     * Get the priority of the service.
     * 
     * @return service priority
     */
    public abstract int getPriority();

    /**
     * Get the weight of the service.
     * 
     * @return service weight
     */
    public abstract int getWeight();

    /**
     * Get the text for the service as raw bytes.
     * 
     * @return raw service text
     */
    public abstract byte[] getTextBytes();

    /**
     * Get the text for the service. This will interpret the text bytes as a UTF8 encoded string. Will return null if the bytes are not a valid UTF8 encoded string.<br/>
     * <b>Note:</b> Do not use. This method make the assumption that the TXT record is one string. This is false. The TXT record is a series of key value pairs.
     * 
     * @return service text
     * @see #getPropertyNames()
     * @see #getPropertyBytes(String)
     * @see #getPropertyString(String)
     * @deprecated since 3.1.7
     */
    @Deprecated
    public abstract String getTextString();

    /**
     * Get the URL for this service. An http URL is created by combining the address, port, and path properties.
     * 
     * @return service URL
     * @deprecated since 3.2.3
     * @see #getURLs()
     */
    @Deprecated
    public abstract String getURL();

    /**
     * Get the list of URL for this service. An http URL is created by combining the address, port, and path properties.
     * 
     * @return list of service URL
     */
    public abstract String[] getURLs();

    /**
     * Get the URL for this service. An URL is created by combining the protocol, address, port, and path properties.
     * 
     * @param protocol
     *            requested protocol
     * @return service URL
     * @deprecated since 3.2.3
     * @see #getURLs()
     */
    @Deprecated
    public abstract String getURL(String protocol);

    /**
     * Get the list of URL for this service. An URL is created by combining the protocol, address, port, and path properties.
     * 
     * @param protocol
     *            requested protocol
     * @return list of service URL
     */
    public abstract String[] getURLs(String protocol);

    /**
     * Get a property of the service. This involves decoding the text bytes into a property list. Returns null if the property is not found or the text data could not be decoded correctly.
     * 
     * @param name
     *            property name
     * @return raw property text
     */
    public abstract byte[] getPropertyBytes(final String name);

    /**
     * Get a property of the service. This involves decoding the text bytes into a property list. Returns null if the property is not found, the text data could not be decoded correctly, or the resulting bytes are not a valid UTF8 string.
     * 
     * @param name
     *            property name
     * @return property text
     */
    public abstract String getPropertyString(final String name);

    /**
     * Enumeration of the property names.
     * 
     * @return property name enumeration
     */
    public abstract Enumeration<String> getPropertyNames();

    /**
     * Returns a description of the service info suitable for printing.
     * 
     * @return service info description
     */
    public abstract String getNiceTextString();

    /**
     * Set the text for the service. Setting the text will fore a re-announce of the service.
     * 
     * @param text
     *            the raw byte representation of the text field.
     * @exception IllegalStateException
     *                if attempting to set the text for a non persistent service info.
     */
    public abstract void setText(final byte[] text) throws IllegalStateException;

    /**
     * Set the text for the service. Setting the text will fore a re-announce of the service.
     * 
     * @param props
     *            a key=value map that will be encoded into raw bytes.
     * @exception IllegalStateException
     *                if attempting to set the text for a non persistent service info.
     */
    public abstract void setText(final Map<String, ?> props) throws IllegalStateException;

    /**
     * Returns <code>true</code> if ServiceListener.resolveService will be called whenever new new information is received.
     * 
     * @return the persistent
     */
    public abstract boolean isPersistent();

    /**
     * Returns the domain of the service info suitable for printing.
     * 
     * @return service domain
     */
    public abstract String getDomain();

    /**
     * Returns the protocol of the service info suitable for printing.
     * 
     * @return service protocol
     */
    public abstract String getProtocol();

    /**
     * Returns the application of the service info suitable for printing.
     * 
     * @return service application
     */
    public abstract String getApplication();

    /**
     * Returns the sub type of the service info suitable for printing.
     * 
     * @return service sub type
     */
    public abstract String getSubtype();

    /**
     * Returns a dictionary of the fully qualified name component of this service.
     * 
     * @return dictionary of the fully qualified name components
     */
    public abstract Map<Fields, String> getQualifiedNameMap();

    /*
     * (non-Javadoc)
     * @see java.lang.Object#clone()
     */
    @Override
    public ServiceInfo clone() {
        try {
            return (ServiceInfo) super.clone();
        } catch (CloneNotSupportedException exception) {
            // clone is supported
            return null;
        }
    }

}