pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / queryparser / src / java / org / apache / lucene / queryParser / core / nodes / MatchAllDocsQueryNode.java

diff --git a/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/core/nodes/MatchAllDocsQueryNode.java b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/core/nodes/MatchAllDocsQueryNode.java
new file mode 100644 (file)
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+++ b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/core/nodes/MatchAllDocsQueryNode.java
@@ -0,0 +1,51 @@
+package org.apache.lucene.queryParser.core.nodes;
+
+/**
+ * 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 org.apache.lucene.queryParser.core.parser.EscapeQuerySyntax;
+
+/**
+ * A {@link MatchAllDocsQueryNode} indicates that a query node tree or subtree
+ * will match all documents if executed in the index.
+ */
+public class MatchAllDocsQueryNode extends QueryNodeImpl {
+
+  private static final long serialVersionUID = -7050381275423477809L;
+
+  public MatchAllDocsQueryNode() {
+    // empty constructor
+  }
+
+  @Override
+  public String toString() {
+    return "<matchAllDocs field='*' term='*'/>";
+  }
+
+  public CharSequence toQueryString(EscapeQuerySyntax escapeSyntaxParser) {
+    return "*:*";
+  }
+
+  @Override
+  public MatchAllDocsQueryNode cloneTree() throws CloneNotSupportedException {
+    MatchAllDocsQueryNode clone = (MatchAllDocsQueryNode) super.cloneTree();
+
+    // nothing to clone
+
+    return clone;
+  }
+}