Source Code Cross Referenced for SortableIntField.java in  » Search-Engine » apache-solr-1.2.0 » org » apache » solr » schema » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Search Engine » apache solr 1.2.0 » org.apache.solr.schema 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         *
009:         *     http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */package org.apache.solr.schema;
017:
018:        import org.apache.lucene.search.SortField;
019:        import org.apache.lucene.search.FieldCache;
020:        import org.apache.solr.search.function.ValueSource;
021:        import org.apache.solr.search.function.FieldCacheSource;
022:        import org.apache.solr.search.function.DocValues;
023:        import org.apache.lucene.document.Fieldable;
024:        import org.apache.lucene.index.IndexReader;
025:        import org.apache.solr.util.NumberUtils;
026:        import org.apache.solr.request.XMLWriter;
027:        import org.apache.solr.request.TextResponseWriter;
028:
029:        import java.util.Map;
030:        import java.io.IOException;
031:
032:        /**
033:         * @author yonik
034:         * @version $Id: SortableIntField.java 479793 2006-11-27 22:40:21Z klaas $
035:         */
036:        public class SortableIntField extends FieldType {
037:            protected void init(IndexSchema schema, Map<String, String> args) {
038:            }
039:
040:            public SortField getSortField(SchemaField field, boolean reverse) {
041:                return getStringSort(field, reverse);
042:            }
043:
044:            public ValueSource getValueSource(SchemaField field) {
045:                return new SortableIntFieldSource(field.name);
046:            }
047:
048:            public String toInternal(String val) {
049:                // special case single digits?  years?, etc
050:                // stringCache?  general stringCache on a
051:                // global field level?
052:                return NumberUtils.int2sortableStr(val);
053:            }
054:
055:            public String toExternal(Fieldable f) {
056:                return indexedToReadable(f.stringValue());
057:            }
058:
059:            public String indexedToReadable(String indexedForm) {
060:                return NumberUtils.SortableStr2int(indexedForm);
061:            }
062:
063:            public void write(XMLWriter xmlWriter, String name, Fieldable f)
064:                    throws IOException {
065:                String sval = f.stringValue();
066:                // since writeInt an int instead of a String since that may be more efficient
067:                // in the future (saves the construction of one String)
068:                xmlWriter.writeInt(name, NumberUtils.SortableStr2int(sval, 0,
069:                        sval.length()));
070:            }
071:
072:            public void write(TextResponseWriter writer, String name,
073:                    Fieldable f) throws IOException {
074:                String sval = f.stringValue();
075:                writer.writeInt(name, NumberUtils.SortableStr2int(sval, 0, sval
076:                        .length()));
077:            }
078:        }
079:
080:        class SortableIntFieldSource extends FieldCacheSource {
081:            protected int defVal;
082:
083:            public SortableIntFieldSource(String field) {
084:                this (field, 0);
085:            }
086:
087:            public SortableIntFieldSource(String field, int defVal) {
088:                super (field);
089:                this .defVal = defVal;
090:            }
091:
092:            public String description() {
093:                return "sint(" + field + ')';
094:            }
095:
096:            public DocValues getValues(IndexReader reader) throws IOException {
097:                final FieldCache.StringIndex index = cache.getStringIndex(
098:                        reader, field);
099:                final int[] order = index.order;
100:                final String[] lookup = index.lookup;
101:                final int def = defVal;
102:
103:                return new DocValues() {
104:                    public float floatVal(int doc) {
105:                        return (float) intVal(doc);
106:                    }
107:
108:                    public int intVal(int doc) {
109:                        int ord = order[doc];
110:                        return ord == 0 ? def : NumberUtils.SortableStr2int(
111:                                lookup[ord], 0, 3);
112:                    }
113:
114:                    public long longVal(int doc) {
115:                        return (long) intVal(doc);
116:                    }
117:
118:                    public double doubleVal(int doc) {
119:                        return (double) intVal(doc);
120:                    }
121:
122:                    public String strVal(int doc) {
123:                        return Integer.toString(intVal(doc));
124:                    }
125:
126:                    public String toString(int doc) {
127:                        return description() + '=' + intVal(doc);
128:                    }
129:                };
130:            }
131:
132:            public boolean equals(Object o) {
133:                return o instanceof  SortableIntFieldSource && super .equals(o)
134:                        && defVal == ((SortableIntFieldSource) o).defVal;
135:            }
136:
137:            private static int hcode = SortableIntFieldSource.class.hashCode();
138:
139:            public int hashCode() {
140:                return hcode + super.hashCode() + defVal;
141:            };
142:        }
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