net.ttddyy.dsproxy.proxy.SimpleResultSetProxyLogic Maven / Gradle / Ivy

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Provide a datasource proxy that can inject your own logic into all queries.

There is a newer version: 1.10

package net.ttddyy.dsproxy.proxy;

import net.ttddyy.dsproxy.ConnectionInfo;
import net.ttddyy.dsproxy.listener.MethodExecutionListenerUtils;

import java.lang.reflect.Method;
import java.sql.ResultSet;

/**
 * Simply delegate method calls to the actual {@link ResultSet}.
 *
 * @author Tadaya Tsuyukubo
 * @since 1.4.3
 */
public class SimpleResultSetProxyLogic implements ResultSetProxyLogic {

    private ResultSet resultSet;
    private ConnectionInfo connectionInfo;
    private ProxyConfig proxyConfig;

    public SimpleResultSetProxyLogic(ResultSet resultSet, ConnectionInfo connectionInfo, ProxyConfig proxyConfig) {
        this.resultSet = resultSet;
        this.connectionInfo = connectionInfo;
        this.proxyConfig = proxyConfig;
    }

    @Override
    public Object invoke(Method method, Object[] args) throws Throwable {
        return MethodExecutionListenerUtils.invoke(new MethodExecutionListenerUtils.MethodExecutionCallback() {
            @Override
            public Object execute(Object proxyTarget, Method method, Object[] args) throws Throwable {
                return performQueryExecutionListener(method, args);
            }
        }, this.proxyConfig, this.resultSet, this.connectionInfo, method, args);
    }

    private Object performQueryExecutionListener(Method method, Object[] args) throws Throwable {

        final String methodName = method.getName();

        // special treat for toString method
        if ("toString".equals(methodName)) {
            final StringBuilder sb = new StringBuilder();
            sb.append(this.resultSet.getClass().getSimpleName());
            sb.append(" [");
            sb.append(this.resultSet.toString());
            sb.append("]");
            return sb.toString(); // differentiate toString message.
        } else if ("getTarget".equals(methodName)) {
            // ProxyJdbcObject interface has a method to return original object.
            return this.resultSet;
        }

        return MethodUtils.proceedExecution(method, this.resultSet, args);
    }
}