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Spring Framework example source code file (AbstractColumnMaxValueIncrementer.java)

This example Spring Framework source code file (AbstractColumnMaxValueIncrementer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

abstractcolumnmaxvalueincrementer, abstractcolumnmaxvalueincrementer, abstractdatafieldmaxvalueincrementer, abstractdatafieldmaxvalueincrementer, column, illegalargumentexception, property, property, sql, string, string

The Spring Framework AbstractColumnMaxValueIncrementer.java source code

/*
 * Copyright 2002-2008 the original author or authors.
 *
 * 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.springframework.jdbc.support.incrementer;

import javax.sql.DataSource;

import org.springframework.util.Assert;

/**
 * Abstract base class for {@link DataFieldMaxValueIncrementer} implementations that use
 * a column in a custom sequence table. Subclasses need to provide the specific handling
 * of that table in their {@link #getNextKey()} implementation..
 *
 * @author Juergen Hoeller
 * @since 2.5.3
 */
public abstract class AbstractColumnMaxValueIncrementer extends AbstractDataFieldMaxValueIncrementer {

	/** The name of the column for this sequence */
	private String columnName;

	/** The number of keys buffered in a cache */
	private int cacheSize = 1;


	/**
	 * Default constructor for bean property style usage.
	 * @see #setDataSource
	 * @see #setIncrementerName
	 * @see #setColumnName
	 */
	public AbstractColumnMaxValueIncrementer() {
	}

	/**
	 * Convenience constructor.
	 * @param dataSource the DataSource to use
	 * @param incrementerName the name of the sequence/table to use
	 * @param columnName the name of the column in the sequence table to use
	 */
	public AbstractColumnMaxValueIncrementer(DataSource dataSource, String incrementerName, String columnName) {
		super(dataSource, incrementerName);
		Assert.notNull(columnName, "Column name must not be null");
		this.columnName = columnName;
	}


	/**
	 * Set the name of the column in the sequence table.
	 */
	public void setColumnName(String columnName) {
		this.columnName = columnName;
	}

	/**
	 * Return the name of the column in the sequence table.
	 */
	public String getColumnName() {
		return this.columnName;
	}

	/**
	 * Set the number of buffered keys.
	 */
	public void setCacheSize(int cacheSize) {
		this.cacheSize = cacheSize;
	}

	/**
	 * Return the number of buffered keys.
	 */
	public int getCacheSize() {
		return this.cacheSize;
	}

	public void afterPropertiesSet() {
		super.afterPropertiesSet();
		if (this.columnName == null) {
			throw new IllegalArgumentException("Property 'columnName' is required");
		}
	}

}

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