org.springframework.jdbc.core.namedparam.BeanPropertySqlParameterSource Maven / Gradle / Ivy
/*
* Copyright 2002-2006 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.core.namedparam;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.BeanWrapperImpl;
import org.springframework.beans.NotReadablePropertyException;
import org.springframework.beans.PropertyAccessor;
import java.util.List;
import java.util.ArrayList;
import java.beans.PropertyDescriptor;
/**
* SqlParameterSource implementation that obtains parameter values
* from bean properties of a given JavaBean object. The names of
* the bean properties have to match the parameter names.
*
* Uses a Spring BeanWrapper for bean property access underneath.
*
* @author Thomas Risberg
* @author Juergen Hoeller
* @since 2.0
* @see NamedParameterJdbcTemplate
* @see org.springframework.beans.BeanWrapper
*/
public class BeanPropertySqlParameterSource extends AbstractSqlParameterSource {
private final BeanWrapper beanWrapper;
private String[] propertyNames = null;
/**
* Create a new BeanPropertySqlParameterSource for the given bean.
* @param object the bean instance to wrap
*/
public BeanPropertySqlParameterSource(Object object) {
this.beanWrapper = new BeanWrapperImpl(object);
}
public boolean hasValue(String paramName) {
return this.beanWrapper.isReadableProperty(paramName);
}
public Object getValue(String paramName) throws IllegalArgumentException {
try {
return this.beanWrapper.getPropertyValue(paramName);
}
catch (NotReadablePropertyException ex) {
throw new IllegalArgumentException(ex.getMessage());
}
}
/**
* Provide access to the property names of the wrapped bean.
* Uses support provided in the {@link PropertyAccessor} interface.
* @return an array containing all the known property names
*/
public String[] getReadablePropertyNames() {
synchronized(this) {
if (propertyNames == null) {
List names = new ArrayList();
PropertyDescriptor[] props = beanWrapper.getPropertyDescriptors();
for (int i = 0; i < props.length; i++) {
if (beanWrapper.isReadableProperty(props[i].getName())) {
names.add(props[i].getName());
}
}
propertyNames = (String[]) names.toArray(new String[names.size()]);
}
}
return propertyNames;
}
}