com.bsiag.geneclipsetoc.internal.contexts.ContextUtility.java Source code

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Here is the source code for com.bsiag.geneclipsetoc.internal.contexts.ContextUtility.java

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/*******************************************************************************
 * Copyright (c) 2016 Jeremie Bresson.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Distribution License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/org/documents/edl-v10.html
 *
 * Contributors:
 *     Jeremie Bresson - initial API and implementation
 ******************************************************************************/
package com.bsiag.geneclipsetoc.internal.contexts;

import java.util.List;

import com.google.common.base.Splitter;
import com.google.common.xml.XmlEscapers;

/**
 * @author jbr
 */
public class ContextUtility {
    /**
     *
     */
    private static final String INDENTATION = "    ";
    private static final String NEW_LINE = "\n";

    private ContextUtility() {
    }

    public static String toXml(List<Context> contexts) {
        StringBuilder sb = new StringBuilder();
        sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
        sb.append(NEW_LINE);
        sb.append("<?NLS TYPE=\"org.eclipse.help.contexts\"?>");
        sb.append(NEW_LINE);
        sb.append("<contexts>");
        if (contexts != null) {
            for (Context context : contexts) {
                sb.append(NEW_LINE);
                sb.append(INDENTATION);
                sb.append("<context");
                appendAttr(sb, "id", context.getId());
                appendAttr(sb, "title", context.getTitle());
                sb.append(">");
                if (context.getDescription() != null && context.getDescription().length() > 0) {
                    sb.append(NEW_LINE);
                    sb.append(INDENTATION);
                    sb.append(INDENTATION);
                    sb.append("<description>");
                    Splitter splitter = Splitter.onPattern("\r?\n");
                    boolean needNewLine = false;
                    for (String line : splitter.split(context.getDescription())) {
                        if (needNewLine) {
                            sb.append(NEW_LINE);
                        }
                        sb.append(XmlEscapers.xmlAttributeEscaper().escape(line));
                        needNewLine = true;
                    }
                    sb.append("</description>");
                }
                if (context.getTopics() != null) {
                    for (Topic topic : context.getTopics()) {
                        sb.append(NEW_LINE);
                        sb.append(INDENTATION);
                        sb.append(INDENTATION);
                        sb.append("<topic");
                        appendAttr(sb, "label", topic.getLabel());
                        appendAttr(sb, "href", topic.getHref());
                        sb.append("/>");
                    }
                }
                sb.append(NEW_LINE);
                sb.append(INDENTATION);
                sb.append("</context>");
            }
        }
        sb.append(NEW_LINE);
        sb.append("</contexts>");
        return sb.toString();
    }

    private static void appendAttr(StringBuilder sb, String attribute, String value) {
        if (value != null && value.length() > 0) {
            sb.append(" ");
            sb.append(attribute);
            sb.append("=\"");
            sb.append(XmlEscapers.xmlAttributeEscaper().escape(value));
            sb.append("\"");
        }
    }
}