w2phtml/src/main/java/w2phtml/rdf/DocumentPart.java

package w2phtml.rdf;

import java.io.StringWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.LSSerializer;

import w2phtml.util.Misc;
import w2phtml.xhtml.XhtmlDocument;

public class DocumentPart {

	private static final String DC_TITLE = "dc.Title";
	private XhtmlDocument excerptDoc;
	private String path;
	private String itemNumber;
	private String body;
	private String parentPath;
	private String name = null;
	private String order = null;
	private Metadata metadata = null;

	public DocumentPart(XhtmlDocument document,Metadata metadata) {
		this.excerptDoc = document;
		this.metadata = metadata;
		extractPath();
		extractName();
		extractNumber();
		extractBody();
		calculateParentPath();
		extractAnnotationMetadata();
	}
	
	public DocumentPart(String path, Metadata metadata) {
		this.path = path;
		this.metadata = metadata;
		this.name = "";
		extractNumber();
		this.body = "";
		calculateParentPath();
	}
	
	private void extractAnnotationMetadata() {
		if (excerptDoc == null) {
			System.out.println("Error. Excerpt doc is null!");
			return;
		}
		Element head = excerptDoc.getHeadNode();
		if (head == null) {
			System.out.println("Error. Head node is null!");
			return;
		}
		NodeList metas = head.getElementsByTagName("meta");
		for (int i = 0; i < metas.getLength();i++) {
			Node meta = metas.item(i);
			if (Misc.isElement(meta)) {
				Element metaElements = (Element) meta;
				if (metaElements.hasAttribute("name") && metaElements.hasAttribute("content")) {
					String metaName = metaElements.getAttribute("name");
					String metaValue = metaElements.getAttribute("content");
					metadata.addMetadata(order, metaName, metaValue);
				}
			}
		}
	}

	private void extractName() {
		Element excerptContentNode = excerptDoc.getContentNode();
		this.name = excerptContentNode.getAttribute("name");		
	}
	private void extractNumber() {
		itemNumber = path.replaceAll("([0-9]+ )+", "");
	}
	public String getPath() {
		return path;
	}
	public String getSafePath(){
		return path.replaceAll(" ","_");
	}
	public String getNumber() {
		return itemNumber;
	}
	public String getBody() {
		return body;
	}
	public void setOrder(String order) {
		this.order = order;
	}
	public String getOrder() {
		return order;
	}
	public String getParentPath() {
		return parentPath;
	}
	public boolean isMasterPart() {
		if (path.isEmpty()) {
			return true;
		}
		return false;
	}
	public String getName() {
		if (metadata != null && order != null) {
			String nameFromMeta = metadata.getFirstValue(order,DC_TITLE);
			if (!nameFromMeta.isEmpty()) {
				return nameFromMeta;
			}
		}
		if (!name.isEmpty()) {
			return name;
		}
		return "No name";
	}
	
	private void extractPath() {
		Element excerptContentNode = excerptDoc.getContentNode();
		this.path = excerptContentNode.getAttribute("path");
	}
	
	private void calculateParentPath() {
		if(path.length() == 1) {
			parentPath = "";
		} else {
			parentPath = path.replaceAll(" [0-9]+$", "");	
		}
	}
	private void extractBody() {
		Element excerptContentNode = excerptDoc.getContentNode();
		StringBuilder bodyBuilder;
		Document document = excerptContentNode.getOwnerDocument();
		TransformerFactory transformerFactory = TransformerFactory.newInstance();  
		Transformer transformer = null;
		try {
			transformer = transformerFactory.newTransformer();
			transformer.setOutputProperty(OutputKeys.METHOD, "html"); 
		} catch (TransformerConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}              
		
		bodyBuilder = new StringBuilder();
		NodeList excerptContentNodes = excerptContentNode.getChildNodes();
		int i = 0;
		while (excerptContentNodes.getLength() > i) {
			Node child = excerptContentNodes.item(i);
			DOMSource source = new DOMSource(child);
			StringWriter sw = new StringWriter();
			Result streamResult = new StreamResult(sw);
			try {
				transformer.transform(source, streamResult );
			} catch (TransformerException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			bodyBuilder.append(sw.toString());
			i++;

		}
		this.body = bodyBuilder.toString();
	}
	public boolean isEmpty() {
		if (metadata == null && body.isEmpty()) {
			return true;
		}
		return false;
	}
}