Reader for Country, Language & Script data file.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/FOP_0-20-0_Alt-Design@194785 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/org/apache/fop/configuration/LanguageFileReader.java b/src/org/apache/fop/configuration/LanguageFileReader.java
new file mode 100644 (file)
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+++ b/src/org/apache/fop/configuration/LanguageFileReader.java
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+/*
+ * $Id$
+ * Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
+ * For details on use and redistribution please refer to the
+ * LICENSE file included with these sources.
+ */
+
+package org.apache.fop.configuration;
+
+// sax
+import org.xml.sax.Attributes;
+import org.xml.sax.XMLReader;
+import org.xml.sax.SAXException;
+import org.xml.sax.InputSource;
+import org.xml.sax.helpers.DefaultHandler;
+import org.xml.sax.helpers.AttributesImpl;
+
+// fop
+import org.apache.fop.messaging.MessageHandler;
+import org.apache.fop.apps.FOPException;
+import org.apache.fop.configuration.ConfigurationReader;
+
+import java.io.IOException;
+
+import java.util.HashMap;
+import java.util.ArrayList;
+
+/**
+ */
+public class LanguageFileReader {
+
+    /**
+     * inputsource for languageFile file
+     */
+    private InputSource filename;
+
+    /**
+     * Map of languages keyed on ISO 639 code
+     */
+    private HashMap languages;
+
+    /**
+     * Map of countries keyed on ISO 3166 code
+     */
+    private HashMap countries;
+
+    /**
+     * Map of scripts keyed on ISO 15924 code
+     */
+    private HashMap scripts;
+
+    /**
+     * @return HashMap of language code mappings
+     */
+    public HashMap getLanguagesHashMap() {
+        return languages;
+    }
+
+    /**
+     * @return HashMap of country code mappings
+     */
+    public HashMap getCountriesHashMap() {
+        return countries;
+    }
+
+    /**
+     * @return HashMap of script code mappings
+     */
+    public HashMap getScriptsHashMap() {
+        return scripts;
+    }
+
+    /**
+     * creates a languageFile reader
+     * @param filename the file which contains the languageFile information
+     */
+    public LanguageFileReader(InputSource filename) {
+        this.filename = filename;
+    }
+
+    /**
+     * intantiates parser and starts parsing of config file
+     */
+    public void start() throws FOPException {
+        XMLReader parser = ConfigurationReader.createParser();
+
+        // setting the parser features
+        try {
+            parser.setFeature
+                    ("http://xml.org/sax/features/namespace-prefixes",
+                     false);
+        } catch (SAXException e) {
+            throw new FOPException
+                    ("You need a parser which supports SAX version 2",
+                     e);
+        }
+        LanguageFileParser languageFileParser = new LanguageFileParser();
+        parser.setContentHandler(languageFileParser);
+
+        try {
+            parser.parse(filename);
+        } catch (SAXException e) {
+            if (e.getException() instanceof FOPException) {
+                throw (FOPException)e.getException();
+            } else {
+                throw new FOPException(e);
+            }
+        } catch (IOException e) {
+            throw new FOPException(e);
+        }
+    }
+    /**
+     * SAX2 Handler which retrieves the configuration information and stores
+     * them in Configuration.
+     * Normally this class doesn't need to be accessed directly.
+     */
+    public class LanguageFileParser extends DefaultHandler {
+
+        /**
+         * Initializes empty languages and countries maps.
+         */
+        public void startDocument() {
+            languages = new HashMap(140);
+            countries = new HashMap(240);
+            scripts = new HashMap(200);
+        }
+
+        /**
+         * Check the element type, and for <tt>language</tt> and
+         * <tt>country</tt>
+         * elements, extract the <tt>code</tt> and <tt>name</tt> attribute
+         * values, and put this pair in the appropriate HashMap.
+         * 
+         */
+        public void startElement(String uri, String localName, String qName,
+                                 Attributes attributes) {
+            String name;
+            String code;
+            AttributesImpl attrs = new AttributesImpl(attributes);
+            if (localName.equals("xml-lang")) {
+            } else if (localName.equals("languagecodes")) {
+            } else if (localName.equals("countrycodes")) {
+            } else if (localName.equals("scriptcodes")) {
+            } else if (localName.equals("language")
+                       | localName.equals("country")
+                       | localName.equals("script")) {
+                // A live one
+                // Extract the attribute values
+                name = null;
+                code = null;
+                for (int i = 0; i < attrs.getLength(); i++) {
+                    String attrLName = attrs.getLocalName(i);
+                    if (attrLName.equals("name"))
+                        name = attrs.getValue(i);
+                    else if (attrLName.equals("code"))
+                        code = attrs.getValue(i);
+                    else MessageHandler.errorln
+                                 ("Unknown attribute in "
+                                  + localName + " language tag");
+                }
+                if (name != null && code != null) {
+                    if (localName.equals("language"))
+                        languages.put((Object)code, (Object)name);
+                    else if (localName.equals("country"))
+                        countries.put((Object)code, (Object)name);
+                    else if (localName.equals("script")) {
+                        scripts.put((Object)code, (Object)name);
+                    }
+                }
+            } else {
+                // to make sure that user knows about false tag
+                MessageHandler.errorln("Unknown tag in languages file: "
+                                       + localName);
+            }
+        }
+    }
+}