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Java example source code file (AbstractLDMLHandler.java)

This example Java source code file (AbstractLDMLHandler.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstractldmlhandler, attributes, calltothreaddumpstack, container, hashmap, ignoredcontainer, keycontainer, map, override, sax, saxexception, string, suppresswarnings, util

The AbstractLDMLHandler.java Java example source code

/*
 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package build.tools.cldrconverter;

import build.tools.cldrconverter.CLDRConverter.DraftType;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;

/**
 * This is an abstract class for general LDML parsing purpose.
 * LDMLParseHandler, SupplementLDMLParseHandler, and NumberingLDMLParseHandler
 * are the subclasses of this class.
 */

abstract class AbstractLDMLHandler<V> extends DefaultHandler {
    static final Map<String, String> DAY_OF_WEEK_MAP = new HashMap<>();
    static {
        DAY_OF_WEEK_MAP.put("sun", "1");
        DAY_OF_WEEK_MAP.put("mon", "2");
        DAY_OF_WEEK_MAP.put("tue", "3");
        DAY_OF_WEEK_MAP.put("wed", "4");
        DAY_OF_WEEK_MAP.put("thu", "5");
        DAY_OF_WEEK_MAP.put("fri", "6");
        DAY_OF_WEEK_MAP.put("sat", "7");
    }
    // Collected data in JRE locale data format.
    private Map<String, V> data = new HashMap<>();

    // The root Container
    Container currentContainer = new Container("$ROOT", null);

    AbstractLDMLHandler() {
    }

    Map<String, V> getData() {
        return data;
    }

    V put(String key, V value) {
        return data.put(key, value);
    }

    V get(String key) {
        return data.get(key);
    }

    Set<String> keySet() {
        return data.keySet();
    }

    /*
     * It returns true if the data should be ignored based on the user
     * defined acceptance level, which is listed with draft attribute in
     * the cldr locale xml files.
     * When the alt attribute is present, the data is always ignored since
     * we always use the primary data
     */
    boolean isIgnored(Attributes attributes) {
        if (attributes.getValue("alt") != null) {
            return true;
        }
        String draftValue = attributes.getValue("draft");
        if (draftValue != null) {
            return DraftType.getDefault().ordinal() > DraftType.forKeyword(draftValue).ordinal();
        }
        return false;
    }

    void pushContainer(String qName, Attributes attributes) {
        if (isIgnored(attributes) || currentContainer instanceof IgnoredContainer) {
            currentContainer = new IgnoredContainer(qName, currentContainer);
        } else {
            currentContainer = new Container(qName, currentContainer);
        }
    }

    void pushIgnoredContainer(String qName) {
        currentContainer = new IgnoredContainer(qName, currentContainer);
    }

    void pushKeyContainer(String qName, Attributes attributes, String key) {
        if (!pushIfIgnored(qName, attributes)) {
            currentContainer = new KeyContainer(qName, currentContainer, key);
        }
    }

    /**
     * start an element that defines a string entry, with the value provided by the element's text.
     */
    void pushStringEntry(String qName, Attributes attributes, String key) {
        if (!pushIfIgnored(qName, attributes)) {
            currentContainer = new StringEntry(qName, currentContainer, key);
        }
    }

    /**
     * start an element that defines a string entry, with the value provided by an attribute value.
     */
    void pushStringEntry(String qName, Attributes attributes, String key, String value) {
        if (!pushIfIgnored(qName, attributes)) {
            currentContainer = new StringEntry(qName, currentContainer, key, value);
        }
    }

    void pushStringArrayEntry(String qName, Attributes attributes, String key, int length) {
        if (!pushIfIgnored(qName, attributes)) {
            currentContainer = new StringArrayEntry(qName, currentContainer, key, length);
        }
    }

    void pushStringArrayElement(String qName, Attributes attributes, int index) {
        if (!pushIfIgnored(qName, attributes)) {
            currentContainer = new StringArrayElement(qName, currentContainer, index);
        }
    }

    private boolean pushIfIgnored(String qName, Attributes attributes) {
        if (isIgnored(attributes) || currentContainer instanceof IgnoredContainer) {
            pushIgnoredContainer(qName);
            return true;
        }
        return false;
    }

    /**
     * Obtains the key from the innermost containing container that provides one.
     */
    String getContainerKey() {
        Container current = currentContainer;
        while (current != null) {
            if (current instanceof KeyContainer) {
                return ((KeyContainer) current).getKey();
            }
            current = current.getParent();
        }
        return null;
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        currentContainer.addCharacters(ch, start, length);
    }

    @SuppressWarnings(value = "CallToThreadDumpStack")
    @Override
    public void warning(SAXParseException e) throws SAXException {
        e.printStackTrace();
    }

    @SuppressWarnings(value = "CallToThreadDumpStack")
    @Override
    public void error(SAXParseException e) throws SAXException {
        e.printStackTrace();
    }

    @SuppressWarnings(value = "CallToThreadDumpStack")
    @Override
    public void fatalError(SAXParseException e) throws SAXException {
        e.printStackTrace();
        super.fatalError(e);
    }
}

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