001/**
002 *
003 * Copyright © 2016 Florian Schmaus
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smackx.iot.discovery.element;
018
019import org.jivesoftware.smack.packet.NamedElement;
020import org.jivesoftware.smack.util.Objects;
021import org.jivesoftware.smack.util.StringUtils;
022import org.jivesoftware.smack.util.XmlStringBuilder;
023
024public class Tag implements NamedElement {
025
026    public enum Type {
027        str,
028        num
029    }
030
031    private final String name;
032    private final Type type;
033    private final String value;
034
035    public Tag(String name, Type type, String value) {
036        // TODO According to XEP-0347 § 5.2 names are case insensitive. Uppercase them all?
037        this.name = StringUtils.requireNotNullNorEmpty(name, "name must not be null nor empty");
038        this.type = Objects.requireNonNull(type);
039        this.value =  StringUtils.requireNotNullNorEmpty(value, "value must not be null nor empty");
040        if (this.name.length() > 32) {
041            throw new IllegalArgumentException("Meta Tag names must not be longer then 32 characters (XEP-0347 § 5.2");
042        }
043        if (this.type == Type.str && this.value.length() > 128) {
044            throw new IllegalArgumentException("Meta Tag string values must not be longer then 128 characters (XEP-0347 § 5.2");
045        }
046    }
047
048    public String getName() {
049        return name;
050    }
051
052    public Type getType() {
053        return type;
054    }
055
056    public String getValue() {
057        return value;
058    }
059
060    @Override
061    public XmlStringBuilder toXML(org.jivesoftware.smack.packet.XmlEnvironment enclosingNamespace) {
062        XmlStringBuilder xml = new XmlStringBuilder(this);
063        xml.attribute("name", name);
064        xml.attribute("value", value);
065        xml.closeEmptyElement();
066        return xml;
067    }
068
069    @Override
070    public String getElementName() {
071        return getType().toString();
072    }
073
074    @Override
075    public String toString() {
076        return name + '(' + type + "):" + value;
077    }
078}