[github-198] Remove jdk.charset module dependency for spreadsheets generation. Thanks to Robert Marcano. This closes #198

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1884631 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/util/CodePageUtil.java

@@ -31,8 +31,6 @@ import java.util.Set;
 public class CodePageUtil
 {
 
-    public static final Set<Charset> DOUBLE_BYTE_CHARSETS = Collections.singleton(StringUtil.BIG5);
-
     /** <p>Codepage 037, a special case</p> */
     public static final int CP_037 = 37;
 
@@ -446,27 +444,4 @@ public class CodePageUtil
                 return "cp" + codepage;
         }
     }
-
-    /**
-     * This tries to convert a LE byte array in cp950
-     * (Microsoft's dialect of Big5) to a String.
-     * We know MS zero-padded ascii, and we drop those.
-     * There may be areas for improvement in this.
-     *
-     * @param data
-     * @param offset
-     * @param lengthInBytes
-     * @return Decoded String
-     */
-    public static String cp950ToString(byte[] data, int offset, int lengthInBytes) {
-        StringBuilder sb = new StringBuilder();
-        LittleEndianCP950Reader reader = new LittleEndianCP950Reader(data, offset, lengthInBytes);
-        int c = reader.read();
-        while (c != -1) {
-            sb.append((char)c);
-            c = reader.read();
-        }
-        reader.close();
-        return sb.toString();
-    }
 }

src/java/org/apache/poi/util/StringUtil.java

@@ -34,7 +34,6 @@ public final class StringUtil {
     public static final Charset UTF16LE = StandardCharsets.UTF_16LE;
     public static final Charset UTF8 = StandardCharsets.UTF_8;
     public static final Charset WIN_1252 = Charset.forName("cp1252");
-    public static final Charset BIG5 = Charset.forName("Big5");
 
     private StringUtil() {
         // no instances of this class

src/multimodule/scratchpad/test9/module-info.java

@@ -82,6 +82,7 @@ module org.apache.poi.scratchpad {
     exports org.apache.poi.hemf.hemfplus.extractor to junit;
     exports org.apache.poi.hslf to junit;
     exports org.apache.poi.hwmf to junit;
+    exports org.apache.poi.hwpf.util to junit;
 
     opens org.apache.poi.hwpf.model to org.mockito;
     opens org.apache.poi.hwpf.model.types to org.mockito;

src/scratchpad/src/org/apache/poi/hwpf/HWPFOldDocument.java

@@ -37,7 +37,7 @@ import org.apache.poi.hwpf.model.TextPieceTable;
 import org.apache.poi.hwpf.usermodel.Range;
 import org.apache.poi.poifs.filesystem.DirectoryNode;
 import org.apache.poi.poifs.filesystem.POIFSFileSystem;
-import org.apache.poi.util.CodePageUtil;
+import org.apache.poi.hwpf.util.DoubleByteUtil;
 import org.apache.poi.util.IOUtils;
 import org.apache.poi.util.LittleEndian;
 import org.apache.poi.util.NotImplemented;
@@ -176,7 +176,7 @@ public class HWPFOldDocument extends HWPFDocumentCore {
               _fib.getFibBase().getFcMac()-_fib.getFibBase().getFcMin(), MAX_RECORD_LENGTH);
 
         int numChars = textData.length;
-        if (CodePageUtil.DOUBLE_BYTE_CHARSETS.contains(guessedCharset)) {
+        if (DoubleByteUtil.DOUBLE_BYTE_CHARSETS.contains(guessedCharset)) {
             numChars /= 2;
         }
 

src/scratchpad/src/org/apache/poi/hwpf/model/OldTextPieceTable.java

@@ -20,7 +20,7 @@ import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Collections;
 
-import org.apache.poi.util.CodePageUtil;
+import org.apache.poi.hwpf.util.DoubleByteUtil;
 import org.apache.poi.util.IOUtils;
 import org.apache.poi.util.Internal;
 
@@ -73,7 +73,7 @@ public class OldTextPieceTable extends TextPieceTable {
             boolean unicode = pieces[x].isUnicode();
             int multiple = 1;
             if (unicode ||
-                    (charset != null && CodePageUtil.DOUBLE_BYTE_CHARSETS.contains(charset))) {
+                    (charset != null && DoubleByteUtil.DOUBLE_BYTE_CHARSETS.contains(charset))) {
                 multiple = 2;
             }
 
@@ -106,7 +106,7 @@ public class OldTextPieceTable extends TextPieceTable {
     @Override
     protected int getEncodingMultiplier(TextPiece textPiece) {
         Charset charset = textPiece.getPieceDescriptor().getCharset();
-        if (charset != null && CodePageUtil.DOUBLE_BYTE_CHARSETS.contains(charset)) {
+        if (charset != null && DoubleByteUtil.DOUBLE_BYTE_CHARSETS.contains(charset)) {
             return 2;
         }
         return 1;

src/scratchpad/src/org/apache/poi/hwpf/model/TextPiece.java

@@ -20,7 +20,7 @@ package org.apache.poi.hwpf.model;
 
 import java.nio.charset.Charset;
 
-import org.apache.poi.util.CodePageUtil;
+import org.apache.poi.hwpf.util.DoubleByteUtil;
 import org.apache.poi.util.Internal;
 import org.apache.poi.util.StringUtil;
 
@@ -77,8 +77,8 @@ public class TextPiece extends PropertyNode<TextPiece> {
      * Create the StringBuilder from the text and unicode flag
      */
     private static StringBuilder buildInitSB(byte[] text, PieceDescriptor pd) {
-        if (StringUtil.BIG5.equals(pd.getCharset())) {
-            return new StringBuilder(CodePageUtil.cp950ToString(text, 0, text.length));
+        if (DoubleByteUtil.BIG5.equals(pd.getCharset())) {
+            return new StringBuilder(DoubleByteUtil.cp950ToString(text, 0, text.length));
         }
 
         String str = new String(text, 0, text.length, (pd.isUnicode()) ? StringUtil.UTF16LE : pd.getCharset());

src/scratchpad/src/org/apache/poi/hwpf/util/DoubleByteUtil.java

@@ -0,0 +1,59 @@
+/* ====================================================================
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================== */
+
+package org.apache.poi.hwpf.util;
+
+import java.nio.charset.Charset;
+import java.util.Collections;
+import java.util.Set;
+
+/**
+ * Utilities for working with double byte CodePages.
+ *
+ * <p>Provides constants for understanding numeric codepages,
+ *  along with utilities to translate these into Java Character Sets.</p>
+ */
+public class DoubleByteUtil
+{
+
+    public static final Charset BIG5 = Charset.forName("Big5");
+
+    public static final Set<Charset> DOUBLE_BYTE_CHARSETS = Collections.singleton(BIG5);
+
+    /**
+     * This tries to convert a LE byte array in cp950
+     * (Microsoft's dialect of Big5) to a String.
+     * We know MS zero-padded ascii, and we drop those.
+     * There may be areas for improvement in this.
+     *
+     * @param data
+     * @param offset
+     * @param lengthInBytes
+     * @return Decoded String
+     */
+    public static String cp950ToString(byte[] data, int offset, int lengthInBytes) {
+        StringBuilder sb = new StringBuilder();
+        LittleEndianCP950Reader reader = new LittleEndianCP950Reader(data, offset, lengthInBytes);
+        int c = reader.read();
+        while (c != -1) {
+            sb.append((char)c);
+            c = reader.read();
+        }
+        reader.close();
+        return sb.toString();
+    }
+}

src/scratchpad/src/org/apache/poi/hwpf/util/LittleEndianCP950Reader.java

@@ -15,13 +15,18 @@
    limitations under the License.
 ==================================================================== */
 
-package org.apache.poi.util;
+package org.apache.poi.hwpf.util;
+
 import java.io.IOException;
 import java.io.Reader;
 import java.nio.ByteBuffer;
 import java.nio.CharBuffer;
 import java.nio.charset.CharsetDecoder;
 
+import org.apache.poi.util.Internal;
+import org.apache.poi.util.POILogFactory;
+import org.apache.poi.util.POILogger;
+
 /**
  * Stream that converts CP950 (MSOffice's dialect of Big5), with
  * zero-byte padding for ASCII and in LittleEndianOrder.
@@ -31,11 +36,10 @@ public class LittleEndianCP950Reader extends Reader {
 
     private static final POILogger LOGGER = POILogFactory.getLogger(LittleEndianCP950Reader.class);
 
-
     private static final char UNMAPPABLE = '?';
     private final ByteBuffer doubleByteBuffer = ByteBuffer.allocate(2);
     private final CharBuffer charBuffer = CharBuffer.allocate(2);
-    private final CharsetDecoder decoder = StringUtil.BIG5.newDecoder();
+    private final CharsetDecoder decoder = DoubleByteUtil.BIG5.newDecoder();
 
     //https://en.wikipedia.org/wiki/Code_page_950
     //see private use area

src/scratchpad/testcases/org/apache/poi/hwpf/util/TestLittleEndianCP950Reader.java

@@ -15,8 +15,7 @@
    limitations under the License.
 ==================================================================== */
 
-package org.apache.poi.util;
-
+package org.apache.poi.hwpf.util;
 
 import static org.junit.Assert.assertEquals;