# MediatorVariable.java

    /*
     *  Licensed to the Apache Software Foundation (ASF) under one
     *  or more contributor license agreements.  See the NOTICE file
     *  distributed with this work for additional information
     *  regarding copyright ownership.  The ASF licenses this file
     *  to you under the Apache License, Version 2.0 (the
     *  "License"); you may not use this file except in compliance
     *  with the License.  You may obtain a copy of the License at
     *
     *   http://www.apache.org/licenses/LICENSE-2.0
     *
     *  Unless required by applicable law or agreed to in writing,
     *  software distributed under the License is distributed on an
     *   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     *  KIND, either express or implied.  See the License for the
     *  specific language governing permissions and limitations
     *  under the License.
     */
    package org.apache.synapse.mediators.xquery;

    import net.sf.saxon.s9api.ItemType;
    import net.sf.saxon.s9api.XdmNodeKind;
    import org.apache.synapse.MessageContext;

    import javax.xml.namespace.QName;

    /**
     * Base class representing mediator variable used in XQuery mediator
     */

    public abstract class MediatorVariable {

        private QName name;
        private ItemType type;
        private XdmNodeKind nodeKind;
        protected Object value;

        public MediatorVariable(QName name) {
            this.name = name;
        }

        public QName getName() {
            return name;
        }

        public void setName(QName name) {
            this.name = name;
        }

        public ItemType getType() {
            return type;
        }

        public void setType(ItemType type) {
            this.type = type;
        }

        public XdmNodeKind getNodeKind() {
            return nodeKind;
        }

        public void setNodeKind(XdmNodeKind nodeKind) {
            this.nodeKind = nodeKind;
        }

        public Object getValue() {
            return value;
        }

        public void setValue(Object value) {
            this.value = value;
        }

        /**
         * Calculates the value of this variable
         *
         * @param synCtx Current message in transit
         * @return <code>true</code> if the value has changed
         */
        public abstract boolean evaluateValue(MessageContext synCtx);

    }