Java tutorial
package org.apache.ddlutils.io; /* * 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 org.apache.commons.beanutils.PropertyUtils; import org.apache.commons.codec.binary.Base64; import org.apache.commons.digester.Rule; import org.apache.ddlutils.io.converters.SqlTypeConverter; import org.apache.ddlutils.model.Column; import org.xml.sax.Attributes; /** * A digester rule for setting a bean property that corresponds to a column * with the value derived from a sub element. * * @version $Revision: 289996 $ */ public class SetColumnPropertyFromSubElementRule extends Rule { /** The column that this rule shall set. */ private Column _column; /** The converter for generating the property value from a string. */ private SqlTypeConverter _converter; /** Whether the element's content uses Base64. */ private boolean _usesBase64 = false; /** * Creates a new creation rule that sets the property corresponding to the given column. * * @param column The column that this rule shall set * @param converter The converter to be used for this column */ public SetColumnPropertyFromSubElementRule(Column column, SqlTypeConverter converter) { _column = column; _converter = converter; } /** * {@inheritDoc} */ public void begin(Attributes attributes) throws Exception { for (int idx = 0; idx < attributes.getLength(); idx++) { String attrName = attributes.getLocalName(idx); if ("".equals(attrName)) { attrName = attributes.getQName(idx); } if (DatabaseIO.BASE64_ATTR_NAME.equals(attrName) && "true".equalsIgnoreCase(attributes.getValue(idx))) { _usesBase64 = true; break; } } } /** * {@inheritDoc} */ public void end() throws Exception { _usesBase64 = false; } /** * {@inheritDoc} */ public void body(String text) throws Exception { String attrValue = text.trim(); if (_usesBase64 && (attrValue != null)) { attrValue = new String(Base64.decodeBase64(attrValue.getBytes())); } Object propValue = (_converter != null ? _converter.convertFromString(attrValue, _column.getTypeCode()) : attrValue); if (digester.getLogger().isDebugEnabled()) { digester.getLogger().debug("[SetColumnPropertyFromSubElementRule]{" + digester.getMatch() + "} Setting property '" + _column.getName() + "' to '" + propValue + "'"); } PropertyUtils.setProperty(digester.peek(), _column.getName(), propValue); } }