/*
 *    Geotoolkit - An Open Source Java GIS Toolkit
 *    http://www.geotoolkit.org
 *
 *    (C) 2008 - 2009, Geomatys
 *
 *    This 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 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.
 */
package org.geotoolkit.sld.xml.v100;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElementRef;
import javax.xml.bind.annotation.XmlMixed;
import javax.xml.bind.annotation.XmlSeeAlso;
import javax.xml.bind.annotation.XmlType;


/**
 * 
 *         The "ParameterValueType" uses WFS-Filter expressions to give
 *         values for SLD graphic parameters.  A "mixed" element-content
 *         model is used with textual substitution for values.
 *       
 * 
 * <p>Java class for ParameterValueType complex type.
 * 
 * <p>The following schema fragment specifies the expected content contained within this class.
 * 
 * <pre>
 * <complexType name="ParameterValueType">
 *   <complexContent>
 *     <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
 *       <sequence maxOccurs="unbounded" minOccurs="0">
 *         <element ref="{http://www.opengis.net/ogc}expression"/>
 *       </sequence>
 *     </restriction>
 *   </complexContent>
 * </complexType>
 * </pre>
 * 
 * 
 * @module
 */
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "ParameterValueType", propOrder = {
    "content"
})
@XmlSeeAlso({
    CssParameter.class
})
public class ParameterValueType {

    @XmlElementRef(name = "expression", namespace = "http://www.opengis.net/ogc", type = JAXBElement.class)
    @XmlMixed
    protected List<Serializable> content;

    /**
     * 
     *         The "ParameterValueType" uses WFS-Filter expressions to give
     *         values for SLD graphic parameters.  A "mixed" element-content
     *         model is used with textual substitution for values.
     *       Gets the value of the content property.
     * 
     * <p>
     * This accessor method returns a reference to the live list,
     * not a snapshot. Therefore any modification you make to the
     * returned list will be present inside the JAXB object.
     * This is why there is not a <CODE>set</CODE> method for the content property.
     * 
     * <p>
     * For example, to add a new item, do as follows:
     * <pre>
     *    getContent().add(newItem);
     * </pre>
     * 
     * 
     * <p>
     * Objects of the following type(s) are allowed in the list
     * {@link JAXBElement }{@code <}{@link FunctionType }{@code >}
     * {@link String }
     * {@link JAXBElement }{@code <}{@link ExpressionType }{@code >}
     * {@link JAXBElement }{@code <}{@link LiteralType }{@code >}
     * {@link JAXBElement }{@code <}{@link BinaryOperatorType }{@code >}
     * {@link JAXBElement }{@code <}{@link BinaryOperatorType }{@code >}
     * {@link JAXBElement }{@code <}{@link BinaryOperatorType }{@code >}
     * {@link JAXBElement }{@code <}{@link PropertyNameType }{@code >}
     * {@link JAXBElement }{@code <}{@link BinaryOperatorType }{@code >}
     * 
     * 
     */
    public List<Serializable> getContent() {
        if (content == null) {
            content = new ArrayList<Serializable>();
        }
        return this.content;
    }

}