[LIB-9] Add ability to archive qrcode content

[chesshog.git] / chesshog-qrcode / src / main / java / org / hedgecode / chess / qrcode / zip / ZipContentDeflater.java

diff --git a/chesshog-qrcode/src/main/java/org/hedgecode/chess/qrcode/zip/ZipContentDeflater.java b/chesshog-qrcode/src/main/java/org/hedgecode/chess/qrcode/zip/ZipContentDeflater.java
new file mode 100644 (file)
index 0000000..5a2c4fe
--- /dev/null
+++ b/chesshog-qrcode/src/main/java/org/hedgecode/chess/qrcode/zip/ZipContentDeflater.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2018-2019. Developed by Hedgecode.
+ *
+ * Licensed 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.hedgecode.chess.qrcode.zip;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.zip.Deflater;
+import java.util.zip.DeflaterOutputStream;
+
+import org.hedgecode.chess.qrcode.ChessQRCodeConstants;
+import org.hedgecode.chess.qrcode.ChessQRCodeException;
+
+/**
+ *
+ *
+ * @author Dmitry Samoshin aka gotty
+ */
+public class ZipContentDeflater {
+
+    public static String deflate(String contents) throws ChessQRCodeException {
+        byte[] bytes = contents.getBytes(
+                ChessQRCodeConstants.CHARSET
+        );
+        if (bytes.length > ZipContentUtils.getMaxContentLength()) {
+            throw new ChessQRCodeException(
+                    ChessQRCodeException.Type.PARSE, "zip.max.length.error"
+            );
+        }
+        ByteArrayOutputStream bout = new ByteArrayOutputStream();
+        DeflaterOutputStream zout = new DeflaterOutputStream(
+                bout, new Deflater(Deflater.BEST_COMPRESSION)
+        );
+        try {
+            try {
+                zout.write(bytes);
+            } finally {
+                zout.close();
+                bout.close();
+            }
+        } catch (IOException e) {
+            throw new ChessQRCodeException(
+                    ChessQRCodeException.Type.PARSE, "zip.deflate.write.error", e.getMessage()
+            );
+        }
+        return ZipContentUtils.base64Encode(
+                ZipContentUtils.concat(
+                        bytes.length,
+                        bout.toByteArray()
+                )
+        );
+    }
+
+
+    public static void main(String[] args) throws ChessQRCodeException {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < 10; ++i) {
+            sb.append(i).append("bla-bla-bla").append(i);
+        }
+        String zipContents = ZipContentDeflater.deflate(sb.toString());
+        System.out.println("Zip Contents: " + zipContents);
+        System.out.println("Zip length: " + zipContents.length());
+        String contents = ZipContentInflater.inflate(zipContents);
+        System.out.println("Unzip Contents: " + contents);
+        System.out.println("Unziip length: " + contents.length());
+        System.out.println("Equals: " + sb.toString().equals(contents));
+    }
+
+}