Example usage for org.apache.lucene.queryparser.flexible.core.nodes GroupQueryNode getChild

Introduction

In this page you can find the example usage for org.apache.lucene.queryparser.flexible.core.nodes GroupQueryNode getChild.

Prototype

public QueryNode getChild() 

Source Link

Usage

From source file:com.sindicetech.siren.qparser.keyword.processors.QueryTypeProcessor.java

License:Open Source License

@Override
protected QueryNode preProcessNode(QueryNode node) throws QueryNodeException {
    // If the current node is a group query node, check the query type and assign it to its children
    if (node instanceof GroupQueryNode) {
        GroupQueryNode groupQueryNode = (GroupQueryNode) node;
        String queryType = null;//from  w  w w .ja  v a 2s.  c o  m

        if (node instanceof NodeGroupQueryNode) {
            queryType = NODE_QUERYTYPE;
        } else if (node instanceof SpanGroupQueryNode) {
            queryType = SPAN_QUERYTYPE;
        } else {
            throw new QueryNodeException(new MessageImpl("Invalid GroupQueryNode received",
                    node.toQueryString(new EscapeQuerySyntaxImpl())));
        }

        // transfer the query type to its child
        groupQueryNode.getChild().setTag(QUERYTYPE_TAG, queryType);
    }
    // in any other cases, if the node is not a leaf node, transfer the query type to its children
    else if (!node.isLeaf()) {
        if (node.getTag(QUERYTYPE_TAG) != null) {
            for (final QueryNode child : node.getChildren()) {
                child.setTag(QUERYTYPE_TAG, node.getTag(QUERYTYPE_TAG));
            }
        }
    }

    return node;
}

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