在Guice中绑定2维数组

Question

我必须使用Guice依赖注入来创建ModelWeights的对象。如何在运行时使用Guice依赖注入来绑定double[][]数组？

public class MW { 

    private double[][] weights; 
    private LogConditionalObjectiveFunction objectiveFunction; 

    @Inject 
    public MW(double[][] weights, LogConditionalObjectiveFunction func) 
    { 
     this.weights = weights; 
     this.objectiveFunction = func; 
    } 

    public double[][] getWeights() 
    { 
     return this.weights; 
    } 

    public LogConditionalObjectiveFunction getObjectiveFunction() 
    { 
     return this.objectiveFunction; 
    } 
} 

我得到这个试图几种方法：

1) No implementation for double[][] was bound. 
    while locating double[][] 
    for parameter 0 at com.data.MW.<init>(MW.java:13) 
    while locating com.data.MW 
    for parameter 0 at com.predictor.impl.MEP.<init>(MEP.java:50) 
    at  com.ServletDependencyInjector$1.configureServlets(ServletDependencyInjector.java:72) 

Answer 1

使用吉斯常数结合

@Inject 
public ModelWeights(@Named("MyMatrix") double[][] weights, LogConditionalObjectiveFunction func) { 
     this.weights = weights; 
     this.objectiveFunction = func; 
} 

而在你的吉斯设置代码

@Override 
protected void configure() { 
    bind(double[][].class).annotatedWith(Names.named("MyMatrix")).toInstance(MY_MATRIX); 
}