Java tutorial
package org.apache.ddlutils.platform; /* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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. */ import java.sql.Date; import java.sql.Time; import java.sql.Timestamp; import java.sql.Types; import org.apache.commons.beanutils.ConversionException; import org.apache.commons.beanutils.ConvertUtils; import org.apache.ddlutils.model.TypeMap; /** * Helper class for dealing with default values, e.g. converting them to other types. * * @version $Revision: 289996 $ */ public class DefaultValueHelper { /** * Converts the given default value from the specified original to the target * jdbc type. * * @param defaultValue The default value * @param originalTypeCode The original type code * @param targetTypeCode The target type code * @return The converted default value */ public String convert(String defaultValue, int originalTypeCode, int targetTypeCode) { String result = defaultValue; if (defaultValue != null) { switch (originalTypeCode) { case Types.BIT: case Types.BOOLEAN: result = convertBoolean(defaultValue, targetTypeCode).toString(); break; case Types.DATE: if (targetTypeCode == Types.TIMESTAMP) { try { Date date = Date.valueOf(result); return new Timestamp(date.getTime()).toString(); } catch (IllegalArgumentException ex) { } } break; case Types.TIME: if (targetTypeCode == Types.TIMESTAMP) { try { Time time = Time.valueOf(result); return new Timestamp(time.getTime()).toString(); } catch (IllegalArgumentException ex) { } } break; } } return result; } /** * Converts a boolean default value to the given target type. * * @param defaultValue The default value * @param targetTypeCode The target type code * @return The converted value */ private Object convertBoolean(String defaultValue, int targetTypeCode) { Boolean value = null; Object result = null; try { value = (Boolean) ConvertUtils.convert(defaultValue, Boolean.class); } catch (ConversionException ex) { return defaultValue; } if ((targetTypeCode == Types.BIT) || (targetTypeCode == Types.BOOLEAN)) { result = value; } else if (TypeMap.isNumericType(targetTypeCode)) { result = (value.booleanValue() ? new Integer(1) : new Integer(0)); } else { result = value.toString(); } return result; } }