1 files changed, 131 insertions, 0 deletions
diff --git a/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/common/Compress.java b/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/common/Compress.java
new file mode 100644
index 0000000..86ff60b
--- /dev/null
+++ b/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/common/Compress.java
@@ -0,0 +1,131 @@
+/*
+    Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.  
+ 
+    Licensed under the Apache License, Version 2.0 (the "License"); 
+    you may not use this code 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.onap.dcae.cdf.util.common;
+
+import java.util.zip.GZIPOutputStream;
+import java.util.zip.ZipOutputStream;
+import java.util.zip.ZipEntry;
+// import java.io.InputStream;
+import java.io.FileOutputStream;
+import java.io.FileInputStream;
+import java.io.File;
+import java.io.IOException;
+
+public class Compress {
+
+    /**
+     * Compress a file with the gzip algorithm, sending output to outFilename.
+     * Based on code at http://www.java-tips.org/java-se-tips/java.util.zip/how-to-compress-a-file-in-the-gip-format.html.
+     */
+    public static void gzip(String inFilename, String outFilename) throws IOException {
+	String tmpFilename = outFilename + ".tmp";
+	try {
+	    // Create the GZIP output stream
+	    GZIPOutputStream out = new GZIPOutputStream(new FileOutputStream(tmpFilename));
+
+	    // Open the input file
+	    FileInputStream in = new FileInputStream(inFilename);
+
+	    // Transfer bytes from the input file to the GZIP output stream
+	    byte[] buf = new byte[4096];
+	    int len;
+	    while ((len = in.read(buf)) > 0) {
+		out.write(buf, 0, len);
+	    }
+	    in.close();
+
+	    // Complete the GZIP file
+	    out.finish();
+	    out.close();
+	    
+	    // rename .gz.tmp to .gz
+	    File target = new File(outFilename);
+	    if (target.exists()) target.delete();
+	    File file = new File(tmpFilename);
+	    boolean result = file.renameTo(target);
+	    if (!result) throw new IOException("Cannot rename " + tmpFilename + " to " + outFilename);
+	} catch (IOException e) {
+	    // If we can't write the gzip file, remove it and pass on the exception.
+	    File f = new File(outFilename);
+	    f.delete();
+	    throw e;
+	}
+    }
+
+    /**
+     * Compress a file with the gzip algorithm, sending output to filename+".gz".
+     */
+    public static void gzip(String filename) throws IOException {
+        gzip(filename, filename + ".gz");
+    }
+
+    /**
+     * Compress a file with the zip algorithm, sending output to outFilename
+     * Based on code at http://www.java-tips.org/java-se-tips/java.util.zip/how-to-compress-a-file-in-the-gip-format.html.
+     */
+    public static void zip(String inFilename, String outFilename) throws IOException {
+	String tmpFilename = outFilename + ".tmp";
+	try {
+	    // Create the ZIP output stream
+	    ZipOutputStream out = new ZipOutputStream(new FileOutputStream(tmpFilename));
+	    ZipEntry zipEntry = new ZipEntry(inFilename);
+	    out.putNextEntry(zipEntry);
+
+	    // Open the input file
+	    FileInputStream in = new FileInputStream(inFilename);
+
+	    // Transfer bytes from the input file to the ZIP output stream
+	    byte[] buf = new byte[4096];
+	    int len;
+	    while ((len = in.read(buf)) > 0) {
+		out.write(buf, 0, len);
+	    }
+	    in.close();
+
+	    // Complete the ZIP file
+	    out.finish();
+	    out.close();
+	    
+	    // rename .zip.tmp to .zip
+	    File target = new File(outFilename);
+	    if (target.exists()) target.delete();
+	    File file = new File(tmpFilename);
+	    boolean result = file.renameTo(target);
+	    if (!result) throw new IOException("Cannot rename " + tmpFilename + " to " + outFilename);
+	} catch (IOException e) {
+	    // If we can't write the zip file, remove it and pass on the exception.
+	    File f = new File(outFilename);
+	    f.delete();
+	    throw e;
+	}
+    }
+
+    /**
+     * Compress a file with the gzip algorithm, sending output to filename+".zip".
+     */
+    public static void zip(String filename) throws IOException {
+        zip(filename, filename + ".zip");
+    }
+
+    public static void main(String args[]) throws Exception {
+	if (args.length == 1) {
+	    gzip(args[0]);
+	    zip(args[0]);
+	} else {
+	    System.err.println("Usage: java Compress filename");
+	}
+    }
+}