org.onecmdb.core.utils.xpath.generator.DebugContentGenerator.java Source code

Introduction

Here is the source code for org.onecmdb.core.utils.xpath.generator.DebugContentGenerator.java

Source

/*
 * Lokomo OneCMDB - An Open Source Software for Configuration
 * Management of Datacenter Resources
 *
 * Copyright (C) 2006 Lokomo Systems AB
 *
 * This program 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 2 of the License, or (at
 * your option) any later version.
 *
 * 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 for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 * 
 * Lokomo Systems AB can be contacted via e-mail: info@lokomo.com or via
 * paper mail: Lokomo Systems AB, Svrdvgen 27, SE-182 33
 * Danderyd, Sweden.
 *
 */
package org.onecmdb.core.utils.xpath.generator;

import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.jxpath.JXPathContext;
import org.apache.commons.jxpath.Pointer;
import org.apache.commons.jxpath.ri.QName;
import org.apache.commons.jxpath.ri.model.NodePointer;
import org.apache.commons.jxpath.ri.model.dynamic.DynamicPointer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.onecmdb.core.utils.xpath.IOneCMDBContentGenerator;
import org.onecmdb.core.utils.xpath.commands.QueryCommand;

/**
 * Debug content generator. Will show the real XPath result.
 *
 */
public class DebugContentGenerator implements IOneCMDBContentGenerator {
    private QueryCommand cmd;
    private Log log = LogFactory.getLog(this.getClass());

    public DebugContentGenerator() {
    }

    public void setCommand(QueryCommand cmd) {
        this.cmd = cmd;
    }

    public String getContentType() {
        return ("text/plain");
    }

    public void transfer(OutputStream out) {
        log.debug("Debug Query path <" + cmd.getPath() + ">");
        PrintWriter text = new PrintWriter(new OutputStreamWriter(out), true);

        Double count = (Double) cmd.getXPathContext().getValue("count(" + cmd.getPath() + ")");
        Iterator<Pointer> iter = cmd.getPathPointers();
        out(text, cmd.getPath() + "[" + count + "]");
        boolean first = true;
        while (iter.hasNext()) {
            Pointer p = (Pointer) iter.next();

            log.debug(p.asPath());

            out(text, "\t" + p.asPath() + "=" + p.getNode());
            String[] outputAttributes = cmd.getOutputAttributeAsArray();
            for (String outputAttribute : outputAttributes) {
                Iterator<Pointer> outputAttrPointersIter = cmd.getRelativePointers(p, outputAttribute);
                while (outputAttrPointersIter.hasNext()) {
                    Pointer outputPointer = outputAttrPointersIter.next();
                    // Try to create some path.
                    out(text, "\t\t" + outputPointer.asPath() + "=" + outputPointer.getNode());
                }
            }
        }
    }

    private void out(PrintWriter w, String text) {
        w.println(text);
        log.debug(text);
    }
}