LUCENE-2144: fix InstantiatedIndex to handle termDocs(null)

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@889432 13f79535-47bb-0310-9956-ffa450edef68

contrib/instantiated/src/java/org/apache/lucene/store/instantiated/InstantiatedAllTermDocs.java

@@ -0,0 +1,34 @@
+/**
+ * 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.
+ */
+
+package org.apache.lucene.store.instantiated;
+
+import org.apache.lucene.index.AbstractAllTermDocs;
+
+class InstantiatedAllTermDocs extends AbstractAllTermDocs {
+
+  private InstantiatedIndexReader reader;
+
+  InstantiatedAllTermDocs(InstantiatedIndexReader reader) {
+    super(reader.maxDoc());
+    this.reader = reader;
+  }
+
+  public boolean isDeleted(int doc) {
+    return reader.isDeleted(doc);
+  }
+}

src/java/org/apache/lucene/index/AbstractAllTermDocs.java

@@ -0,0 +1,84 @@
+/**
+ * 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.
+ */
+
+package org.apache.lucene.index;
+
+import java.io.IOException;
+
+public abstract class AbstractAllTermDocs implements TermDocs {
+
+  protected int maxDoc;
+  protected int doc = -1;
+
+  protected AbstractAllTermDocs(int maxDoc) {
+    this.maxDoc = maxDoc;
+  }
+
+  public void seek(Term term) throws IOException {
+    if (term==null) {
+      doc = -1;
+    } else {
+      throw new UnsupportedOperationException();
+    }
+  }
+
+  public void seek(TermEnum termEnum) throws IOException {
+    throw new UnsupportedOperationException();
+  }
+
+  public int doc() {
+    return doc;
+  }
+
+  public int freq() {
+    return 1;
+  }
+
+  public boolean next() throws IOException {
+    return skipTo(doc+1);
+  }
+
+  public int read(int[] docs, int[] freqs) throws IOException {
+    final int length = docs.length;
+    int i = 0;
+    while (i < length && doc < maxDoc) {
+      if (!isDeleted(doc)) {
+        docs[i] = doc;
+        freqs[i] = 1;
+        ++i;
+      }
+      doc++;
+    }
+    return i;
+  }
+
+  public boolean skipTo(int target) throws IOException {
+    doc = target;
+    while (doc < maxDoc) {
+      if (!isDeleted(doc)) {
+        return true;
+      }
+      doc++;
+    }
+    return false;
+  }
+
+  public void close() throws IOException {
+  }
+
+  public abstract boolean isDeleted(int doc);
+}