PlivoElement.java

package com.plivo.helper.xml.elements;

import java.util.ArrayList;
import java.util.HashMap;

import com.plivo.helper.exception.PlivoException;

// TODO: Auto-generated Javadoc
/**
 * The Class PlivoElement.
 */
public class PlivoElement {

    protected String tag;

    protected String body;

    protected HashMap<String, String> attributes;

    protected ArrayList<PlivoElement> childTags;

    protected ArrayList<String> nestableElements;

    public static final String E_RESPONSE = "Response";
    
    public static final String E_CONFERENCE = "Conference";

    public static final String E_DIAL = "Dial";
    
    public static final String E_NUMBER = "Number";
    
    public static final String E_USER = "User";

    public static final String E_GETDIGITS = "GetDigits";

    public static final String E_HANGUP = "Hangup";

    public static final String E_MESSAGE = "Message";

    public static final String E_PLAY = "Play";

    public static final String E_PREANSWER = "PreAnswer";

    public static final String E_RECORD = "Record";

    public static final String E_REDIRECT = "Redirect";

    public static final String E_SPEAK = "Speak";

    public static final String E_WAIT = "Wait";

    public static final String E_DTMF = "DTMF";

    /**
     * Instantiates a new verb.
     *
     * @param tag the tag
     * @param body the body
     */
    public PlivoElement(String tag, String body)
      // TODO Auto-generated constructor stub
    {
        this.tag = tag;
        this.body = body;
        this.attributes = new HashMap<String, String>();
        this.childTags = new ArrayList<PlivoElement>();
    }

    /**
     * Append.
     *
     * @param nestable element
     * @return element
     * @throws PlivoException the plivo exception
     */
    public PlivoElement append(PlivoElement element) throws PlivoException {
       if(this.nestableElements != null && this.nestableElements.contains(element.getTag())) {
           this.childTags.add(element);
           return element;
       } else {
           throw new PlivoException(String.format("<%1s> is not nestable in <%2s>.", element.getTag(), this.getTag()));
       }
    }

    /**
     * To xml.
     *
     * @return the string
     */
    public String toXML(){
        String xml = "<" + this.tag;
        for (String key : attributes.keySet()) {
            xml += " " + key + "=\"" + attributes.get(key) + "\"";
        }
        
        if(this.body != null) {
            xml += ">" + this.body + "</" + this.tag + ">";
        } else if(!this.childTags.isEmpty()) {
        	xml += ">";
            for (PlivoElement child : childTags) {
                xml += child.toXML();
            }
            xml += "</" + this.tag + ">";
        } else {
        	xml += "/>";
        }
        return xml;
    }

    /**
     * Sets the attributes for XML element.
     *
     * @param key the key
     * @param value the value
     */
    public void set(String key, String value) {
       attributes.put(key,value);
    }

    /**
     * Gets the body.
     *
     * @return the body
     */
    public String getBody() {
       return this.body;
    }

    /**
     * Gets the tag.
     *
     * @return the tag
     */
    public String getTag() {
       return this.tag;
    }

    /**
     * Gets the children.
     *
     * @return the children
     */
    public ArrayList<PlivoElement> getChildren() {
       return this.childTags;
    }

    /**
     * Gets the attributes.
     *
     * @return the attributes
     */
    public HashMap<String, String> getAttributes() {
       return this.attributes;
    }

}