annis.sqlgen.CorpusPathWhereClauseGenerator.java Source code

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Here is the source code for annis.sqlgen.CorpusPathWhereClauseGenerator.java

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/*
 * Copyright 2012 SFB 632.
 *
 * 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 annis.sqlgen;

import static annis.sqlgen.AbstractSqlGenerator.TABSTOP;
import static annis.sqlgen.SqlConstraints.join;

import annis.model.QueryNode;
import annis.ql.parser.QueryData;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;

import java.util.Set;
import org.apache.commons.lang3.StringUtils;

/**
 *
 * 
 * 
 * @author benjamin
 */
public class CorpusPathWhereClauseGenerator extends AbstractFromClauseGenerator
        implements WhereClauseSqlGenerator<QueryData> {

    @Override
    public String fromClause(QueryData queryData, List<QueryNode> alternative, String indent) {
        List<String> tables = new ArrayList<String>();

        for (int i = 0; i < alternative.size(); i++) {
            QueryNode n = alternative.get(i);
            tables.add("corpus" + " AS corpus" + (i + 1));
        }
        return StringUtils.join(tables, ", " + indent + TABSTOP);
    }

    @Override
    public Set<String> whereConditions(QueryData queryData, List<QueryNode> alternative, String indent) {
        Set<String> conditions = new HashSet<String>();
        int i = 0;

        for (QueryNode n : alternative) {
            i++;
            String factTable = tables(n).aliasedTable("node", 1) + ".corpus_ref";
            String corpusTable = tables(n).aliasedTable("corpus", i) + ".id";

            conditions.add(join("=", factTable, corpusTable));
        }

        return conditions;
    }
}