pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / facet / src / java / org / apache / lucene / facet / index / attributes / CategoryAttributesIterable.java

diff --git a/lucene-java-3.5.0/lucene/contrib/facet/src/java/org/apache/lucene/facet/index/attributes/CategoryAttributesIterable.java b/lucene-java-3.5.0/lucene/contrib/facet/src/java/org/apache/lucene/facet/index/attributes/CategoryAttributesIterable.java
new file mode 100644 (file)
index 0000000..74760d7
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/contrib/facet/src/java/org/apache/lucene/facet/index/attributes/CategoryAttributesIterable.java
@@ -0,0 +1,69 @@
+package org.apache.lucene.facet.index.attributes;
+
+import java.util.Iterator;
+
+import org.apache.lucene.facet.index.streaming.CategoryAttributesStream;
+import org.apache.lucene.facet.taxonomy.CategoryPath;
+
+/**
+ * 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.
+ */
+
+/**
+ * This class transforms an {@link Iterable} of {@link CategoryPath} objects
+ * into an {@link Iterable} of {@link CategoryAttribute} objects, which can be
+ * used to construct a {@link CategoryAttributesStream}.
+ * 
+ * @lucene.experimental
+ */
+public class CategoryAttributesIterable implements Iterable<CategoryAttribute> {
+
+  private Iterable<CategoryPath> inputIterable;
+
+  public CategoryAttributesIterable(Iterable<CategoryPath> inputIterable) {
+    this.inputIterable = inputIterable;
+  }
+
+  public Iterator<CategoryAttribute> iterator() {
+    return new CategoryAttributesIterator(this.inputIterable);
+  }
+
+  private static class CategoryAttributesIterator implements Iterator<CategoryAttribute> {
+
+    private Iterator<CategoryPath> internalIterator;
+    private CategoryAttributeImpl categoryAttributeImpl;
+
+    public CategoryAttributesIterator(Iterable<CategoryPath> inputIterable) {
+      this.internalIterator = inputIterable.iterator();
+      this.categoryAttributeImpl = new CategoryAttributeImpl();
+    }
+
+    public boolean hasNext() {
+      return this.internalIterator.hasNext();
+    }
+
+    public CategoryAttribute next() {
+      this.categoryAttributeImpl.setCategoryPath(this.internalIterator
+          .next());
+      return this.categoryAttributeImpl;
+    }
+
+    public void remove() {
+      this.internalIterator.remove();
+    }
+
+  }
+}