pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / index / ReusableStringReader.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/ReusableStringReader.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/ReusableStringReader.java
new file mode 100644 (file)
index 0000000..092604e
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/ReusableStringReader.java
@@ -0,0 +1,60 @@
+package org.apache.lucene.index;
+
+/**
+ * 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.Reader;
+
+/** Used by DocumentsWriter to implemented a StringReader
+ *  that can be reset to a new string; we use this when
+ *  tokenizing the string value from a Field. */
+final class ReusableStringReader extends Reader {
+  int upto;
+  int left;
+  String s;
+  void init(String s) {
+    this.s = s;
+    left = s.length();
+    this.upto = 0;
+  }
+  @Override
+  public int read(char[] c) {
+    return read(c, 0, c.length);
+  }
+  @Override
+  public int read(char[] c, int off, int len) {
+    if (left > len) {
+      s.getChars(upto, upto+len, c, off);
+      upto += len;
+      left -= len;
+      return len;
+    } else if (0 == left) {
+      // don't keep a reference (s could have been very large)
+      s = null;
+      return -1;
+    } else {
+      s.getChars(upto, upto+left, c, off);
+      int r = left;
+      left = 0;
+      upto = s.length();
+      return r;
+    }
+  }
+  @Override
+  public void close() {}
+}
+