/**
* Copyright 2014 National University of Ireland, Galway.
*
* This file is part of the SIREn project. Project and contact information:
*
* https://github.com/rdelbru/SIREn
*
* Licensed 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.
*/
package org.sindice.siren.qparser.json.parser;
import org.apache.lucene.queryparser.flexible.core.nodes.ModifierQueryNode.Modifier;
import org.apache.lucene.search.BooleanClause.Occur;
import org.codehaus.jackson.JsonNode;
import org.sindice.siren.qparser.json.ParseException;
/**
* Parses a <code>occur</code> property and returns a {@link Modifier}.
*/
public class OccurPropertyParser extends JsonPropertyParser {
public static final String OCCUR_PROPERTY = "occur";
public OccurPropertyParser(final JsonNode node, final CharSequence field) {
super(node, field);
}
@Override
String getProperty() {
return OCCUR_PROPERTY;
}
@Override
Modifier parse() throws ParseException {
final JsonNode value = node.path(OCCUR_PROPERTY);
if (!value.isTextual()) {
throw new ParseException("Invalid property'" + OCCUR_PROPERTY + "': value is not textual");
}
try {
final Occur occur = Occur.valueOf(value.asText());
switch (occur) {
case MUST:
return Modifier.MOD_REQ;
case SHOULD:
return Modifier.MOD_NONE;
case MUST_NOT:
return Modifier.MOD_NOT;
default:
throw new ParseException("Invalid value '" + value.asText() + "' for property '" + OCCUR_PROPERTY + "'");
}
}
catch (final IllegalArgumentException e) {
throw new ParseException("Invalid value '" + value.asText() + "' for property '" + OCCUR_PROPERTY + "'", e);
}
}
}