presto.android.gui.PropertyManager.java Source code

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Here is the source code for presto.android.gui.PropertyManager.java

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/*
 * PropertyManager.java - part of the GATOR project
 *
 * Copyright (c) 2014, The Ohio State University
 *
 * This file is distributed under the terms described in LICENSE in the
 * root directory.
 */
package presto.android.gui;

import java.util.Iterator;
import java.util.Set;

import presto.android.Hierarchy;
import presto.android.gui.graph.NNode;
import presto.android.gui.graph.NObjectNode;
import presto.android.gui.graph.NStringConstantNode;
import presto.android.gui.graph.NStringIdNode;
import presto.android.xml.XMLParser;

import com.google.common.base.Joiner;
import com.google.common.collect.Sets;

public class PropertyManager {
    private static PropertyManager theInstance;

    Hierarchy hier = Hierarchy.v();
    XMLParser xml = XMLParser.Factory.getXMLParser();

    PropertyManager() {

    }

    public static PropertyManager v() {
        if (theInstance == null) {
            theInstance = new PropertyManager();
        }
        return theInstance;
    }

    // === public interfaces

    /*
     * Given an object node, returns possible values of its title.
     */
    public Set<String> getTextsOrTitlesOfView(NObjectNode view) {
        Iterator<NNode> textNodes = view.getTextNodes();
        Set<String> titles = Sets.newHashSet();
        while (textNodes.hasNext()) {
            NNode textNode = textNodes.next();
            String title = textNodeToString(textNode);
            if (title != null) {
                titles.add(title);
            }
        }
        return titles;
    }

    final static String SEPARATOR = "8AwrACha";

    public String getSpeciallySeparatedTextOrTitlesOfView(NObjectNode view) {
        Set<String> titleSet = getTextsOrTitlesOfView(view);
        if (titleSet == null || titleSet.isEmpty()) {
            return null;
        }
        return Joiner.on(SEPARATOR).join(titleSet);
    }

    public String getCommaSeparatedTextsOrTitlesOfView(NObjectNode view) {
        Set<String> titleSet = getTextsOrTitlesOfView(view);
        if (titleSet == null || titleSet.isEmpty()) {
            return null;
        }
        return Joiner.on(',').join(titleSet);
    }

    public String textNodeToString(NNode textNode) {
        if (textNode instanceof NStringConstantNode) {
            return ((NStringConstantNode) textNode).value;
        } else if (textNode instanceof NStringIdNode) {
            Integer stringId = ((NStringIdNode) textNode).getIdValue();
            if (stringId == null) {
                return null;
            }
            return xml.getStringValue(stringId);
        } else {
            throw new RuntimeException("Unknown textNode " + textNode);
        }
    }
}