source: main/trunk/greenstone3/src/java/org/greenstone/gsdl3/util/GSParams.java@ 24861

/*
 *    GSParams.java
 *    Copyright (C) 2008 New Zealand Digital Library, http://www.nzdl.org
 *
 *    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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
package org.greenstone.gsdl3.util;

import java.util.HashMap;

/** keeps track of the interface parameters, and their defaults */
public class GSParams
{
    public static final String ACTION = "a"; // the major type of action- eg query or browse or process
    public static final String SUBACTION = "sa"; // subtype of action if we want different processing than the default
    public static final String REQUEST_TYPE = "rt"; // whether the request is just to display the service form, or to actually do a request to the service
    public static final String RESPONSE_ONLY = "ro"; // if == 1 do the request and pass back the response xml - no page formatting
    public static final String OUTPUT = "o"; // if processing is to be done, what type of output - html/xml/other??
    public static final String HTTPHEADERFIELDS = "hhf";
    public static final String SERVICE = "s"; // the name of the service
    public static final String CLUSTER = "c"; // these two are the same
    public static final String SYSTEM = "s";
    public static final String CONFIGURE = "c";
    public static final String COLLECTION = "c";
    public static final String LANGUAGE = "l";
    public static final String DOCUMENT = "d";
    public static final String DOCUMENT_TYPE = "dt";
    public static final String RESOURCE = "r";
    public static final String PROCESS_ID = "pid"; // if a request wasn't completed, this identifies the request - used when asking for a status update
    public static final String COLLECTION_TYPE = "ct";

    public static final String SIBLING = "sib"; // this should not be in here
    // internal configure args
    public static final String SYSTEM_SUBSET = "ss";
    public static final String SYSTEM_CLUSTER = "sc";
    public static final String SYSTEM_MODULE_NAME = "sn";
    public static final String SYSTEM_MODULE_TYPE = "st";

    public static final String EXPAND_DOCUMENT = "ed";
    public static final String EXPAND_CONTENTS = "ec";
    public static final String REALISTIC_BOOK = "book";

    // used for filtering out a piece of the final page
    public static final String EXCERPT_ID = "excerptid";
    public static final String EXCERPT_TAG = "excerpttag";
    protected HashMap param_map = null;

    public GSParams()
    {
        this.param_map = new HashMap(30);

        // add in all the standard params
        addParameter(ACTION, false);
        addParameter(SUBACTION, false);
        addParameter(REQUEST_TYPE, false);
        addParameter(RESPONSE_ONLY, false);
        addParameter(CLUSTER, false); // we don't want to save collection 
        //addParameter(COLLECTION); 
        addParameter(LANGUAGE, true);
        addParameter(DOCUMENT, true);
        addParameter(RESOURCE, true);
        addParameter(OUTPUT, false);
        addParameter(SERVICE, false);
        addParameter(PROCESS_ID, true);
        addParameter(SYSTEM_SUBSET, false);
        addParameter(SYSTEM_CLUSTER, false);
        addParameter(SYSTEM_MODULE_NAME, false);
        addParameter(SYSTEM_MODULE_TYPE, false);
        addParameter(SIBLING, false);
        addParameter(DOCUMENT_TYPE, true);
        addParameter(EXPAND_DOCUMENT, false);
        addParameter(EXPAND_CONTENTS, false);
        addParameter(REALISTIC_BOOK, false);

        //addParameter();
        // ugly hack so we don't save the extlink param
        addParameter("s0.ext", false);
        addParameter(COLLECTION_TYPE, true); // collection type - mg or mgpp

        // filtering args must be specified each time
        addParameter(EXCERPT_ID, false);
        addParameter(EXCERPT_TAG, false);
    }

    public boolean addParameter(String name, boolean save)
    {
        return addParameter(name, "", save);
    }

    public boolean addParameter(String name, String default_value, boolean save)
    {
        if (this.param_map.containsKey(name))
        {
            // already there so could not add
            return false;
        }

        this.param_map.put(name, new Param(default_value, save));
        return true;
    }

    public boolean setParamDefault(String name, String default_value)
    {
        Param p = (Param) this.param_map.get(name);
        if (p == null)
            return false;
        p.default_value = default_value;
        return true;
    }

    public boolean shouldSave(String name)
    {
        if (name.startsWith("p."))
            return false;
        Param p = (Param) this.param_map.get(name);
        if (p == null)
            return true; // if things are not in here, always save.
        return p.save;
    }

    private class Param
    {

        public String default_value = null;
        public boolean save = true;

        public Param(String default_value, boolean save)
        {
            this.default_value = default_value;
            this.save = save;
        }
    }
}