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

Introduction

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

Prototype

public boolean isLeaf();

Source Link

Document

verify if a node is a Leaf node

Usage

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

License:Open Source License

@Override
protected QueryNode preProcessNode(QueryNode node) throws QueryNodeException {
    final QueryConfigHandler conf = this.getQueryConfigHandler();

    // If the current node is a datatype query node, validate the datatype and assign it to its child
    if (node instanceof DatatypeQueryNode) {
        final Map<String, Analyzer> dtAnalyzers = conf.get(KeywordConfigurationKeys.DATATYPES_ANALYZERS);
        final DatatypeQueryNode dt = (DatatypeQueryNode) node;
        String datatype = dt.getDatatype();

        // check if the datatype is correctly registered
        if (dtAnalyzers == null) {
            throw new IllegalArgumentException("KeywordConfigurationKeys.DATAYPES_ANALYZERS "
                    + "should be set on the ExtendedKeywordQueryConfigHandler");
        }//from ww  w  .  j  a v  a  2 s  .c  o m
        if (!dtAnalyzers.containsKey(datatype)) {
            throw new IllegalArgumentException("Unknown datatype: [" + datatype + "]");
        }
        if (dtAnalyzers.get(datatype) == null) {
            throw new IllegalArgumentException("Analyzer of datatype [" + datatype + "] cannot be null.");
        }

        // transfer the datatype to its child
        dt.getChild().setTag(DatatypeQueryNode.DATATYPE_TAGID, datatype);
    }
    // If the current node is a twig query node, assign the json:field datatype to the root, and assign the default
    // or the tagged datatype to the child
    else if (node instanceof TwigQueryNode) {
        final TwigQueryNode twig = (TwigQueryNode) node;
        if (twig.getTag(DatatypeQueryNode.DATATYPE_TAGID) == null) {
            twig.getChild().setTag(DatatypeQueryNode.DATATYPE_TAGID, this.getDefaultDatatype(conf));
        } else {
            twig.getChild().setTag(DatatypeQueryNode.DATATYPE_TAGID, this.getDatatype(conf, node));
        }
        twig.getRoot().setTag(DatatypeQueryNode.DATATYPE_TAGID, JSONDatatype.JSON_FIELD);
    }
    // in any other cases, if the node is not a leaf node, transfer the datatype to its children
    else if (!node.isLeaf()) {
        for (final QueryNode child : node.getChildren()) {
            child.setTag(DatatypeQueryNode.DATATYPE_TAGID, this.getDatatype(conf, node));
        }
    }

    return node;
}

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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;//  www .  ja  va 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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From source file:org.sindice.siren.qparser.keyword.builders.DatatypeQueryNodeBuilder.java

License:Apache License

/**
 * Sets the given datatype on each descendant of the {@link DatatypeQueryNode}
 */// ww w.j av  a  2  s .  com
private void setDatatype(final QueryNode node, final String datatype) {
    final Query query = (Query) node.getTag(QueryTreeBuilder.QUERY_TREE_BUILDER_TAGID);
    if (query instanceof NodePrimitiveQuery) {
        ((NodePrimitiveQuery) query).setDatatype(datatype);
    }
    if (node.isLeaf()) {
        return;
    }
    for (final QueryNode child : node.getChildren()) {
        this.setDatatype(child, datatype);
    }
}

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