Example usage for org.apache.lucene.queryparser.flexible.core.nodes QueryNode containsTag

Introduction

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

Prototype

public boolean containsTag(String tagName);

Source Link

Document

verify if a node contains a tag

Usage

From source file:com.sindicetech.siren.qparser.tree.builders.TwigQueryNodeBuilder.java

License:Open Source License

/**
 * Process the child and descendant queries
 *//*  w w w .  j  a v  a 2s .  co  m*/
protected final void processChildren(final List<QueryNode> children, final TwigQuery query) {
    for (final QueryNode child : children) {
        final Object obj = child.getTag(QueryTreeBuilder.QUERY_TREE_BUILDER_TAGID);
        final NodeQuery nodeQuery = (NodeQuery) obj;

        // Append child queries
        if (child instanceof ChildQueryNode) {
            query.addChild(nodeQuery, this.getModifierValue(child));
        }
        // Append descendant queries
        else if (child instanceof DescendantQueryNode) {
            // A descendant node must always have a level constraint
            if (!child.containsTag(LevelPropertyParser.LEVEL_PROPERTY)) {
                throw new IllegalArgumentException(
                        "Invalid DescendantQueryNode received: no level constraint defined");
            }
            // set level constraint
            final int nodeLevel = (Integer) child.getTag(LevelPropertyParser.LEVEL_PROPERTY);
            // add descendant query
            query.addDescendant(nodeLevel, nodeQuery, this.getModifierValue(child));
        } else {
            throw new IllegalArgumentException(
                    "Invalid QueryNode received: " + child.getClass().getSimpleName());
        }
    }
}

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