#919 - io.ebean package initial

src/main/java/io/ebeaninternal/util/IOUtils.java

@@ -0,0 +1,99 @@
+package io.ebeaninternal.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.Reader;
+
+/**
+ * Utilities for IO.
+ */
+public class IOUtils {
+
+  /**
+   * Reads the entire contents of the specified input stream and returns them
+   * as a byte array.
+   */
+  public static byte[] read(InputStream in) throws IOException {
+    ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+    pump(in, buffer);
+    return buffer.toByteArray();
+  }
+
+  /**
+   * Reads the entire contents of the specified input stream and returns them
+   * as an ASCII string.
+   */
+  public static String readAscii(InputStream in) throws IOException {
+    return EncodeUtil.bytesToAscii(read(in));
+  }
+
+  /**
+   * Reads the entire contents of the specified input stream and returns them
+   * as UTF-8 string.
+   */
+  public static String readUtf8(InputStream in) throws IOException {
+    return EncodeUtil.bytesToUtf8(read(in));
+  }
+
+  /**
+   * Reads the entire contents of the specified input stream and returns them
+   * as a string using the encoding supplied.
+   */
+  public static String readEncoded(InputStream in, String encoding) throws IOException {
+    return EncodeUtil.decodeBytes(read(in), encoding);
+  }
+
+  /**
+   * Read the entire contents from the reader returning as a String.
+   */
+  public static String read(Reader reader) throws IOException {
+
+    StringBuilder sb = new StringBuilder();
+    try {
+      char[] buffer = new char[4096];
+      for (; ; ) {
+        int len = reader.read(buffer);
+        if (len < 0) {
+          break;
+        }
+        sb.append(buffer, 0, len);
+      }
+    } finally {
+      reader.close();
+    }
+
+    return sb.toString();
+  }
+
+  /**
+   * Reads data from the specified input stream and copies it to the specified
+   * output stream, until the input stream is at EOF. Both streams are then
+   * closed.
+   *
+   * @throws IOException if the input or output stream is <code>null</code>
+   */
+  public static void pump(InputStream in, OutputStream out) throws IOException {
+
+    if (in == null) throw new IOException("Input stream is null");
+    if (out == null) throw new IOException("Output stream is null");
+
+    try {
+      try {
+        byte[] buffer = new byte[4096];
+        for (; ; ) {
+          int bytes = in.read(buffer);
+          if (bytes < 0) {
+            break;
+          }
+          out.write(buffer, 0, bytes);
+        }
+      } finally {
+        in.close();
+      }
+    } finally {
+      out.close();
+    }
+  }
+}