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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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.elasticsearch.search.suggest.phrase;
import org.elasticsearch.common.ParseFieldMatcher;
import org.elasticsearch.common.ParsingException;
import org.elasticsearch.common.io.stream.NamedWriteable;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.query.QueryParseContext;
import org.elasticsearch.search.suggest.phrase.WordScorer.WordScorerFactory;
import java.io.IOException;
public abstract class SmoothingModel implements NamedWriteable<SmoothingModel>, ToXContent {
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(getWriteableName());
innerToXContent(builder,params);
builder.endObject();
return builder;
}
@Override
public final boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
SmoothingModel other = (SmoothingModel) obj;
return doEquals(other);
}
@Override
public final int hashCode() {
/*
* Override hashCode here and forward to an abstract method to force
* extensions of this class to override hashCode in the same way that we
* force them to override equals. This also prevents false positives in
* CheckStyle's EqualsHashCode check.
*/
return doHashCode();
}
protected abstract int doHashCode();
public static SmoothingModel fromXContent(QueryParseContext parseContext) throws IOException {
XContentParser parser = parseContext.parser();
ParseFieldMatcher parseFieldMatcher = parseContext.getParseFieldMatcher();
XContentParser.Token token;
String fieldName = null;
SmoothingModel model = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
fieldName = parser.currentName();
} else if (token == XContentParser.Token.START_OBJECT) {
if (parseFieldMatcher.match(fieldName, LinearInterpolation.PARSE_FIELD)) {
model = LinearInterpolation.innerFromXContent(parseContext);
} else if (parseFieldMatcher.match(fieldName, Laplace.PARSE_FIELD)) {
model = Laplace.innerFromXContent(parseContext);
} else if (parseFieldMatcher.match(fieldName, StupidBackoff.PARSE_FIELD)) {
model = StupidBackoff.innerFromXContent(parseContext);
} else {
throw new IllegalArgumentException("suggester[phrase] doesn't support object field [" + fieldName + "]");
}
} else {
throw new ParsingException(parser.getTokenLocation(),
"[smoothing] unknown token [" + token + "] after [" + fieldName + "]");
}
}
return model;
}
public abstract WordScorerFactory buildWordScorerFactory();
/**
* subtype specific implementation of "equals".
*/
protected abstract boolean doEquals(SmoothingModel other);
protected abstract XContentBuilder innerToXContent(XContentBuilder builder, Params params) throws IOException;
}
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