package com.github.rnewson.couchdb.lucene;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.search.Query;

import com.github.rnewson.couchdb.lucene.couchdb.FieldType;

/**
 * Copyright 2010 Robert Newson
 * 
 * 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.
 */

public final class TypedField {

    private static Pattern PATTERN = Pattern.compile("^(\\w+)(<(\\w+)>)?$");

    private final String name;

    private final FieldType type;

    public TypedField(final String string) throws ParseException {
        final Matcher matcher = PATTERN.matcher(string);

        if (!matcher.matches()) {
            throw new ParseException("Field '" + string + "' not recognized.");
        }

        this.name = matcher.group(1);
        try {
            this.type = matcher.group(3) == null ? FieldType.STRING : FieldType.valueOf(matcher.group(3).toUpperCase());
        } catch (final IllegalArgumentException e) {
            throw new ParseException("Unrecognized type '" + matcher.group(3) + "'");
        }
    }

    public String getName() {
        return name;
    }
    
    public FieldType getType() {
        return type;
    }

    public int toSortField() {
        return type.toSortField();
    }

    public Query toRangeQuery(final String lower, final String upper, final boolean inclusive) throws ParseException {
        return type.toRangeQuery(name, lower, upper, inclusive);
    }
    
    public Query toTermQuery(final String text) throws ParseException {
        return type.toTermQuery(name, text);
    }

    @Override
    public String toString() {
        return String.format("%s<%s>", name, type.toString().toLowerCase());
    }

}

@@ -947,19 +947,25 @@
 (%22%5E(
+%5B
 %5C%5Cw
+_.%5D
 +)(%3C(
+%5B
 %5C%5Cw
+%5D
 +)%3E)

allow _ and . in field names. (closes #128)