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package net.gdface.web;

import java.io.PrintWriter;
import java.io.StringWriter;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonInclude.Include;

/**
 * {@link Response}默认实现
 * @author guyadong
 *
 */
public class DefaultResponse implements Response{
    private static boolean outStrackTrace = false;
    /** 调用成功标志 */
    private boolean success;
    /** 调用的返回值 */
    private Object result;
    /** 异常信息 */
    @JsonInclude(Include.NON_NULL)
    private String errorMessage;
    /** 异常堆栈信息 */
    @JsonInclude(Include.NON_NULL)
    private String stackTrace;
    /** 代理对象 */
    @JsonIgnore
    private Object delegate;
    /** 调用异常 */
    @JsonIgnore
    private Exception error;
    @Override
    public void onComplete(Object result) {
        this.success = true;
        this.result = result;
        this.errorMessage = null;
        this.stackTrace = null;
    }
    @Override
    public void onComplete() {
        onComplete(null);
    }
    @Override
    public void onError(Exception e) {
		if(e instanceof TranformValueException){
			onComplete((((TranformValueException)e).getResult()));
			return ;
		}
        success = false;
        result = null;
        errorMessage = e.getMessage();
        error = e;
        if(errorMessage == null){
            errorMessage = e.getClass().getSimpleName();
        }
        if(outStrackTrace){
            StringWriter writer = new StringWriter();
            e.printStackTrace(new PrintWriter(writer));
            stackTrace = writer.toString();
        }
    }

    @Override
	public boolean isSuccess() {
        return success;
    }

    public void setSuccess(boolean success) {
        this.success = success;
    }

    @Override
	public Object getResult() {
        return result;
    }

    @Override
	public void setResult(Object result) {
        this.result = result;
    }

    public String getErrorMessage() {
        return errorMessage;
    }

    public void setErrorMessage(String errorMessage) {
        this.errorMessage = errorMessage;
    }

    public String getStackTrace() {
        return stackTrace;
    }

    public void setStackTrace(String stackTrace) {
        this.stackTrace = stackTrace;
    }
    
	@Override
	public Object delegate() {
		return delegate;
	}

	@Override
	public Exception error() {
		return error;
	}
	@Override
	public void delegate(Object delegate) {
		this.delegate = delegate;
	}
	@Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append("DefaultResponse [success=");
        builder.append(success);
        builder.append(", ");
        if (result != null) {
            builder.append("result=");
            builder.append(result);
            builder.append(", ");
        }
        if (errorMessage != null) {
            builder.append("errorMessage=");
            builder.append(errorMessage);
            builder.append(", ");
        }
        if (stackTrace != null) {
            builder.append("stackTrace=");
            builder.append(stackTrace);
        }
        builder.append("]");
        return builder.toString();
    }
    /**
     * 开启输出堆栈信息(默认为不开启)

     * 开发时为了调试需要获取详细的异常堆栈信息可以开启
     */
    public static void enableStrackTrace() {
        outStrackTrace = true;
    }
}