source: trunk/greenstone3-extensions/gs3build/src/org/greenstone/gsdl3/gs3build/schema/SchemaElement.java@ 12188

package org.greenstone.gsdl3.gs3build.schema;

import java.util.*;

import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class SchemaElement
{ 
    // the following may contain duplicates when compared to SchemaAttribute, but this is
    // deliberate...
    public static final String ELEMENT_TYPE_STRING = "String";

  String name;
    String type;
  List   attributes;
  List   childElements;
    int    minOccurs;
    int    maxOccurs;

    public SchemaElement(Element element)
    {
        // get the name of this element
        this.name = element.getAttribute("name");
        if (this.name == null) {
            // TODO: this is a reference object
            String ref = element.getAttribute("ref");

            if (ref != null) {
                // TODO: fetch the actual object
            }
            else {
                // TODO: abort
            }
        }

        this.type = element.getAttribute("type");
        if (this.type == null || this.type.length() == 0)
        { this.type = SchemaElement.ELEMENT_TYPE_STRING;
        }

        String temp;
        temp = element.getAttribute("minOccurs");
        if (temp != null && temp.length() > 0) {
            this.minOccurs = Integer.parseInt(temp);
            this.minOccurs = 1;
        }
        temp = element.getAttribute("maxOccurs");
        if (temp != null && temp.length() > 0) {
            this.maxOccurs = Integer.parseInt(temp);
        }
        else {
            this.maxOccurs = 1;
        }

        this.expand(element);
    }

    private void expand(Element element)
    { // TODO
        // get the first child element
        NodeList children = element.getChildNodes();
        if (children != null) {
            for (int i = 0; i < children.getLength(); i ++)
            { if (children.item(i).getNodeType() != org.w3c.dom.Node.ELEMENT_NODE) {
                    // TODO: raise an error
                    continue;
                }

                String name = children.item(i).getNodeName();
                if (name == null) {
                    continue;
                }
                
                try {
                    Object child = SchemaNodeFactory.makeNode((Element) children.item(i));
                    if (child != null) {
                        this.childElements.add(child);
                    }
                }
                catch (SchemaException ex)
                {
                }
            }
        }
    }

  public SchemaElement(String name)
  { this.name = name;
    this.attributes = new ArrayList();
    this.childElements = new ArrayList();
  }

  public void addAttribute(SchemaAttribute attribute)
  {
      this.attributes.add(attribute);
  }

    public void addElement(SchemaElement element)
    {
            this.childElements.add(element);
    }
}