Download tiles in chunks

[GpsPrune.git] / src / tim / prune / function / srtm / SrtmSource.java

diff --git a/src/tim/prune/function/srtm/SrtmSource.java b/src/tim/prune/function/srtm/SrtmSource.java
index 44ceccfab52a13a5ced20108ad539cafbf2c6fb2..6e49ad18383060541e8378c854df365db86c0144 100644 (file)
--- a/src/tim/prune/function/srtm/SrtmSource.java
+++ b/src/tim/prune/function/srtm/SrtmSource.java
@@ -3,11 +3,13 @@ package tim.prune.function.srtm;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
+import java.io.InputStream;
 import java.io.IOException;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
 public abstract class SrtmSource {
+       // methods implemented by each source
        public abstract String getName();
        public abstract boolean isReadyToUse();
        public abstract boolean downloadTile(SrtmTile inTile)
@@ -15,6 +17,24 @@ public abstract class SrtmSource {
        public abstract int getRowSize(SrtmTile inTile);
        protected abstract String getSourceExtension();
 
+       protected boolean downloadToFile(InputStream inStream, File outputFile)
+               throws IOException
+       {
+               FileOutputStream outStream = new FileOutputStream(outputFile);
+
+               byte[] buffer = new byte[4096];
+               int read = 0;
+               while ((read = inStream.read(buffer)) != -1)
+               {
+                       outStream.write(buffer, 0, read);
+               }
+               // Make sure streams are closed
+               try {inStream.close();} catch (Exception e) {}
+               try {outStream.close();} catch (Exception e) {}
+               return true;
+
+       }
+
        protected int[] slurpTileHeigths(ZipInputStream inStream, int tileSize)
                throws IOException
        {