/*
 * Copyright 2011 James Moger.
 *
 * 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 com.iciql;

import java.text.MessageFormat;

import com.iciql.util.StringUtils;

/**
 * Represents a traditional PreparedStatment fragment like "id=?, name=?".
 * 
 */
public class RuntimeToken implements Token {

	final String fragment;
	final Object[] args;

	public RuntimeToken(String fragment, Object... args) {
		this.fragment = fragment;
		this.args = args == null ? new Object[0] : args;
	}

	/**
	 * Append the SQL to the given statement using the given query.
	 * 
	 * @param stat
	 *            the statement to append the SQL to
	 * @param query
	 *            the query to use
	 */
	@Override
	public <T> void appendSQL(SQLStatement stat, Query<T> query) {
		int tokenCount = StringUtils.count('?', fragment);
		if (tokenCount != args.length) {
			throw new IciqlException(MessageFormat.format(
					"Fragment \"{0}\" specifies {1} tokens but you supplied {2} args", fragment, tokenCount,
					args.length));
		}
		stat.appendSQL(fragment);
		for (Object arg : args) {
			stat.addParameter(arg);
		}
	}
}