/*
* Copyright 1999-2017 Alibaba Group Holding Ltd.
*
* 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.alibaba.druid.proxy.jdbc;
import java.sql.SQLException;
import java.sql.Wrapper;
import java.util.HashMap;
import java.util.Map;
import com.alibaba.druid.filter.FilterChain;
/**
* @author wenshao [szujobs@hotmail.com]
*/
public abstract class WrapperProxyImpl implements WrapperProxy {
private final Wrapper raw;
private final long id;
private Map<String, Object> attributes; // 不需要线程安全
public WrapperProxyImpl(Wrapper wrapper, long id){
this.raw = wrapper;
this.id = id;
}
public long getId() {
return this.id;
}
public Object getRawObject() {
return raw;
}
public abstract FilterChain createChain();
@Override
public boolean isWrapperFor(Class<?> iface) throws SQLException {
if (iface == null) {
return false;
}
if (iface == this.getClass()) {
return true;
}
return createChain().isWrapperFor(raw, iface);
}
@SuppressWarnings("unchecked")
@Override
public <T> T unwrap(Class<T> iface) throws SQLException {
if (iface == null) {
return null;
}
if (iface == this.getClass()) {
return (T) this;
}
return createChain().unwrap(raw, iface);
}
public int getAttributesSize() {
if (attributes == null) {
return 0;
}
return attributes.size();
}
public void clearAttributes() {
if (this.attributes == null) {
return;
}
this.attributes.clear();
}
public Map<String, Object> getAttributes() {
if (attributes == null) {
attributes = new HashMap<String, Object>(4);
}
return this.attributes;
}
public void putAttribute(String key, Object value) {
if (attributes == null) {
attributes = new HashMap<String, Object>(4);
}
this.attributes.put(key, value);
}
public Object getAttribute(String key){
if (attributes == null) {
return null;
}
return this.attributes.get(key);
}
}