pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / store / InputStreamDataInput.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/store/InputStreamDataInput.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/store/InputStreamDataInput.java
new file mode 100644 (file)
index 0000000..fbc95f7
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/store/InputStreamDataInput.java
@@ -0,0 +1,58 @@
+package org.apache.lucene.store;
+
+/**
+ * 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.
+ */
+
+import java.io.*;
+
+import org.apache.lucene.store.DataInput;
+
+/**
+ * A {@link DataInput} wrapping a plain {@link InputStream}.
+ */
+public class InputStreamDataInput extends DataInput implements Closeable {
+  private final InputStream is;
+  
+  public InputStreamDataInput(InputStream is) {
+    this.is = is;
+  }
+
+  @Override
+  public byte readByte() throws IOException {
+    int v = is.read();
+    if (v == -1) throw new EOFException();
+    return (byte) v;
+  }
+  
+  @Override
+  public void readBytes(byte[] b, int offset, int len) throws IOException {
+    while (len > 0) {
+      final int cnt = is.read(b, offset, len);
+      if (cnt < 0) {
+          // Partially read the input, but no more data available in the stream.
+          throw new EOFException();
+      }
+      len -= cnt;
+      offset += cnt;
+    }
+  }
+
+  // @Override -- not until Java 1.6
+  public void close() throws IOException {
+    is.close();
+  }
+}