fr.gouv.culture.vitam.reader.XmlReader.java Source code

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Here is the source code for fr.gouv.culture.vitam.reader.XmlReader.java

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/**
 * This file is part of Vitam Project.
 * 
 * Copyright 2010, Frederic Bregier, and individual contributors by the @author tags. See the
 * COPYRIGHT.txt in the distribution for a full listing of individual contributors.
 * 
 * All Vitam Project is free software: you can redistribute it and/or modify it under the terms of
 * the GNU General Public License as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 * 
 * Vitam 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 for more details.
 * 
 * You should have received a copy of the GNU General Public License along with Vitam. If not, see
 * <http://www.gnu.org/licenses/>.
 */
package fr.gouv.culture.vitam.reader;

import java.io.File;
import java.io.IOException;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

/**
 * Vitam Reader
 * @author "Frederic Bregier"
 * 
 */
public class XmlReader implements VitamReader {
    public File file;
    public String[] xpaths;
    private Document document;
    private List<Node> nodes;

    /**
     * @param filexml
     * @param xpaths First xpath is the global xpath (foreach xpaths[0]) while others are subfields
     * @throws DocumentException 
     */
    @SuppressWarnings("unchecked")
    public XmlReader(File filexml, String[] xpaths) throws DocumentException {
        this.file = filexml;
        this.xpaths = xpaths;

        SAXReader saxReader = new SAXReader();
        document = saxReader.read(file);
        nodes = document.selectNodes(xpaths[0]);
    }

    @Override
    public String[] readOneLine() throws IOException {
        if (this.nodes != null) {
            if (this.nodes.isEmpty()) {
                this.nodes = null;
                return null;
            }
            String[] result = new String[xpaths.length - 1];
            Node root = this.nodes.remove(0);
            for (int i = 1; i < xpaths.length; i++) {
                Node sub = root.selectSingleNode(xpaths[i]);
                if (sub != null) {
                    result[i - 1] = sub.getText();
                } else {
                    result[i - 1] = null;
                }
            }
            return result;
        }
        return null;
    }

    @Override
    public String[] readOneLine(int rank) throws IOException {
        return readOneLine();
    }

}