/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.solr.schema;
import org.apache.lucene.search.SortField;
import org.apache.solr.search.QParser;
import org.apache.solr.search.function.ValueSource;
import org.apache.solr.search.function.FieldCacheSource;
import org.apache.solr.search.function.DocValues;
import org.apache.solr.search.function.StringIndexDocValues;
import org.apache.lucene.document.Fieldable;
import org.apache.lucene.index.IndexReader;
import org.apache.solr.util.NumberUtils;
import org.apache.solr.response.TextResponseWriter;
import org.apache.solr.response.XMLWriter;
import java.util.Map;
import java.io.IOException;
/**
* @version $Id: SortableFloatField.java 1071480 2011-02-17 02:23:10Z hossman $
*/
public class SortableFloatField extends FieldType {
@Override
protected void init(IndexSchema schema, Map<String,String> args) {
}
@Override
public SortField getSortField(SchemaField field,boolean reverse) {
return getStringSort(field,reverse);
}
@Override
public ValueSource getValueSource(SchemaField field, QParser qparser) {
field.checkFieldCacheSource(qparser);
return new SortableFloatFieldSource(field.name);
}
@Override
public String toInternal(String val) {
return NumberUtils.float2sortableStr(val);
}
@Override
public String toExternal(Fieldable f) {
return indexedToReadable(f.stringValue());
}
@Override
public Float toObject(Fieldable f) {
return NumberUtils.SortableStr2float(f.stringValue());
}
@Override
public String indexedToReadable(String indexedForm) {
return NumberUtils.SortableStr2floatStr(indexedForm);
}
@Override
public void write(XMLWriter xmlWriter, String name, Fieldable f) throws IOException {
String sval = f.stringValue();
xmlWriter.writeFloat(name, NumberUtils.SortableStr2float(sval));
}
@Override
public void write(TextResponseWriter writer, String name, Fieldable f) throws IOException {
String sval = f.stringValue();
writer.writeFloat(name, NumberUtils.SortableStr2float(sval));
}
}
class SortableFloatFieldSource extends FieldCacheSource {
protected float defVal;
public SortableFloatFieldSource(String field) {
this(field, 0.0f);
}
public SortableFloatFieldSource(String field, float defVal) {
super(field);
this.defVal = defVal;
}
@Override
public String description() {
return "sfloat(" + field + ')';
}
@Override
public DocValues getValues(Map context, IndexReader reader) throws IOException {
final float def = defVal;
return new StringIndexDocValues(this, reader, field) {
@Override
protected String toTerm(String readableValue) {
return NumberUtils.float2sortableStr(readableValue);
}
@Override
public float floatVal(int doc) {
int ord=order[doc];
return ord==0 ? def : NumberUtils.SortableStr2float(lookup[ord]);
}
@Override
public int intVal(int doc) {
return (int)floatVal(doc);
}
@Override
public long longVal(int doc) {
return (long)floatVal(doc);
}
@Override
public double doubleVal(int doc) {
return (double)floatVal(doc);
}
@Override
public String strVal(int doc) {
return Float.toString(floatVal(doc));
}
@Override
public String toString(int doc) {
return description() + '=' + floatVal(doc);
}
};
}
@Override
public boolean equals(Object o) {
return o instanceof SortableFloatFieldSource
&& super.equals(o)
&& defVal == ((SortableFloatFieldSource)o).defVal;
}
private static int hcode = SortableFloatFieldSource.class.hashCode();
@Override
public int hashCode() {
return hcode + super.hashCode() + Float.floatToIntBits(defVal);
};
}