SearchableManifest.java

/* This file is part of SlumDroid <https://code.google.com/p/slumdroid/>.
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3
 * as published by the Free Software Foundation.
 *
 * This program 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 General Public License <http://www.gnu.org/licenses/gpl-3.0.txt>
 * for more details.
 * 
 * Copyright (C) 2013-2015 Gennaro Imparato
 */

package it.slumdroid.wizard.tools;

import java.io.File;
import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

import org.w3c.dom.Document;
import org.xml.sax.SAXException;

class SearchableManifest {

	private Document doc;

	public SearchableManifest (Document manifest) {
		this.doc = manifest;
	}

	public SearchableManifest (String path) {
		File file = new File(path);
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		DocumentBuilder db;
		try {
			db = dbf.newDocumentBuilder();
			Document manifest = db.parse(file);
			this.doc = manifest;
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	public String parseXpath (String query) {
		try {
			XPath manifestXpath = XPathFactory.newInstance().newXPath();
			XPathExpression manifestXpathExpr = manifestXpath.compile(query);
			Object manifestResult = manifestXpathExpr.evaluate(this.doc);
			return (String)manifestResult;
		} catch (XPathExpressionException e) {
			e.printStackTrace();
		}
		return new String();
	}

}