diff options
Diffstat (limited to 'container-search/src/main/java/com/yahoo/prelude/query/NonReducibleCompositeItem.java')
| -rw-r--r-- | container-search/src/main/java/com/yahoo/prelude/query/NonReducibleCompositeItem.java | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/container-search/src/main/java/com/yahoo/prelude/query/NonReducibleCompositeItem.java b/container-search/src/main/java/com/yahoo/prelude/query/NonReducibleCompositeItem.java new file mode 100644 index 00000000000..abac8200f49 --- /dev/null +++ b/container-search/src/main/java/com/yahoo/prelude/query/NonReducibleCompositeItem.java @@ -0,0 +1,16 @@ +// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. +package com.yahoo.prelude.query; + +/** + * A composite item which specifies semantics which are not maintained + * if an instance with a single child is replaced by the single child. + * <p> + * Most composites, like AND and OR, are reducible as e.g (AND a) is semantically equal to (a). + * <p> + * This type functions as a marked interfaces for query rewriters. + * + * @author <a href="mailto:bratseth@yahoo-inc.com">Jon Bratseth</a> + * @since 5.1.22 + */ +public abstract class NonReducibleCompositeItem extends CompositeItem { +} |