/**
 * Copyright (c) 2009
 * Philipp Giese, Sven Wagner-Boysen
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package org.activiti.kickstart.bpmn20.model;

import java.util.ArrayList;
import java.util.List;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAnyElement;
import javax.xml.bind.annotation.XmlMixed;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlSeeAlso;
import javax.xml.bind.annotation.XmlType;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

import org.activiti.kickstart.bpmn20.diagram.UUIDGenerator;
import org.activiti.kickstart.bpmn20.util.EscapingStringAdapter;


/**
 * <p>Java class for tExpression complex type.
 * 
 * <p>The following schema fragment specifies the expected content contained within this class.
 * 
 * <pre>
 * <complexType name="tExpression">
 *   <complexContent>
 *     <extension base="{http://www.omg.org/bpmn20}tBaseElementWithMixedContent">
 *     </extension>
 *   </complexContent>
 * </complexType>
 * </pre>
 * 
 * 
 */
@XmlRootElement(/*name = "conditionExpression"*/)
@XmlSeeAlso({
	FormalExpression.class
})
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "tExpression", propOrder = {
    "content"
})
public class Expression
    extends BaseElement
{	
	/**
	 * Default no-arg constructor
	 */
	public Expression() {
		super();
	}
	
	public Expression(String text) {
		super();
		this.setId(UUIDGenerator.generate());
		this.getContent().add(text);
	}
	
	@XmlMixed
    @XmlAnyElement(lax = true)
    @XmlJavaTypeAdapter(EscapingStringAdapter.class)
    protected List<String> content;
	
	/**
	 * Is used for exporting the expression.
	 * 
	 * @return Returns a string, or null if there is no expression.
	 */
    public String toExportString(){
    	return this.getContent().size() == 0? null : this.getContent().get(0);
    }
	
	public List<String> getContent() {
        if (content == null) {
            content = new ArrayList<String>();
        }
        return this.content;
    }

}