TableDefinitionParser.java

/*
 * Copyright 2010 NCHOVY
 * 
 * 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 org.krakenapps.sqlparser.parser;

import java.util.List;

import org.krakenapps.bnf.Binding;
import org.krakenapps.bnf.Parser;
import org.krakenapps.sqlparser.ast.ColumnDefinition;
import org.krakenapps.sqlparser.ast.TableDefinition;

public class TableDefinitionParser implements Parser {

	@SuppressWarnings("unchecked")
	@Override
	public Object parse(Binding b) {
		Binding[] children = b.getChildren();

		int tableNamePosition = parseTableName(b);
		String tableName = (String) children[tableNamePosition].getValue();
		List<ColumnDefinition> columnDefinitions = (List<ColumnDefinition>) children[tableNamePosition + 1].getValue();
		return new TableDefinition(tableName, columnDefinitions);
	}

	private int parseTableName(Binding spec) {
		for (int i = 0; i < spec.getChildren().length; i++) {
			Binding el = spec.getChildren()[i];
			Object value = el.getValue();
			if (value instanceof String && ((String) value).equalsIgnoreCase("TABLE"))
				return i + 1;
		}

		throw new IllegalStateException("table name not found");
	}
}