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Viewing changes to src/main/java/cz/startnet/utils/pgdiff/parsers/CreateIndexParser.java

  • Committer: Bazaar Package Importer
  • Author(s): Christoph Berg
  • Date: 2008-09-09 15:42:54 UTC
  • Revision ID: james.westby@ubuntu.com-20080909154254-458sv7ew1rczdal1
Tags: upstream-1.2
Import upstream version 1.2

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src/main/java/cz/startnet/utils/pgdiff/parsers/CreateIndexParser.java
 
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/*
 
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 * $Id: CreateIndexParser.java 93 2008-08-03 12:31:08Z fordfrog $
 
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 */
 
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package cz.startnet.utils.pgdiff.parsers;
 
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import cz.startnet.utils.pgdiff.schema.PgDatabase;
 
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import cz.startnet.utils.pgdiff.schema.PgIndex;
 
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import cz.startnet.utils.pgdiff.schema.PgTable;
 
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import java.util.regex.Matcher;
 
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import java.util.regex.Pattern;
 
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/**
 
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 * Parses CREATE INDEX commands.
 
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 *
 
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 * @author fordfrog
 
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 * @version $Id: CreateIndexParser.java 93 2008-08-03 12:31:08Z fordfrog $
 
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 */
 
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public class CreateIndexParser {
 
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    /**
 
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     * Pattern for parsing CREATE INDEX definition.
 
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     */
 
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    private static final Pattern PATTERN =
 
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        Pattern.compile(
 
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        "CREATE[\\s](UNIQUE[\\s]+)?+INDEX[\\s]+\"?([^\\s\"]+)\"?[\\s]+" +
 
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        "ON[\\s]+\"?([^\\s\"(]+)\"?[\\s]*([^;]+)[;]?",
 
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        Pattern.CASE_INSENSITIVE);
 
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    /**
 
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     * Creates a new instance of CreateIndexParser.
 
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     */
 
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    private CreateIndexParser() {
 
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        super();
 
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    }
 
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    /**
 
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     * Parses CREATE INDEX command.
 
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     *
 
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     * @param database database
 
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     * @param command CREATE INDEX command
 
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     *
 
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     * @throws ParserException Thrown if problem occured while parsing the
 
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     *         command.
 
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     */
 
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    public static void parse(final PgDatabase database, final String command) {
 
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        final Matcher matcher = PATTERN.matcher(command.trim());
 
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        if (matcher.matches()) {
 
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            final boolean unique = matcher.group(1) != null;
 
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            final String indexName = matcher.group(2);
 
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            final String tableName = matcher.group(3);
 
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            final String def = matcher.group(4);
 
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            if ((indexName == null) || (tableName == null) || (def == null)) {
 
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                throw new ParserException(
 
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                    ParserException.CANNOT_PARSE_COMMAND + command);
 
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            }
 
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            final PgTable table =
 
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                database.getSchema(
 
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                ParserUtils.getSchemaName(tableName.trim(), database)).getTable(
 
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                tableName.trim());
 
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            final PgIndex index = new PgIndex(indexName);
 
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            table.addIndex(index);
 
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            index.setDefinition(def.trim());
 
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            index.setTableName(table.getName());
 
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            index.setUnique(unique);
 
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        } else {
 
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            throw new ParserException(
 
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                ParserException.CANNOT_PARSE_COMMAND + command);
 
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        }
 
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    }
 
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}