我们不希望在未选择某些强制尺寸时执行后处理器。 例如, 我们有称为风险类型,敏感曲线,成熟度,货币1和显示货币的维度。 我们还有一个名为Rate.Move的后处理度量 - 它实现了doLeafEvaluation。
在我们的客户中,
答案 0 :(得分:2)
从后处理器内部,只有一种方法可以发现用户最初选择的维度和级别(最有可能是在MDX查询中):您自省后期处理器评估的位置
这是一个小型后处理器示例(它设计为在ActivePivot Sandbox应用程序中运行)。后处理器定义上下文维度,此示例中为时间维度。如果用户已扩展时间维度,则评估的位置将具有至少2的深度(深度1表示仅为该维度选择AllMember)。然后,您可以决定根据该知识返回不同的度量或计算。
/*
* (C) Quartet FS 2010
* ALL RIGHTS RESERVED. This material is the CONFIDENTIAL and PROPRIETARY
* property of Quartet Financial Systems Limited. Any unauthorized use,
* reproduction or transfer of this material is strictly prohibited
*/
package com.quartetfs.pivot.sandbox.postprocessor.impl;
import java.util.Properties;
import com.quartetfs.biz.pivot.IActivePivot;
import com.quartetfs.biz.pivot.ILocation;
import com.quartetfs.biz.pivot.impl.Util;
import com.quartetfs.biz.pivot.postprocessing.impl.ABasicPostProcessor;
import com.quartetfs.fwk.QuartetException;
import com.quartetfs.fwk.QuartetExtendedPluginValue;
/**
*
* @author Quartet FS
*
*/
@QuartetExtendedPluginValue(
interfaceName = "com.quartetfs.biz.pivot.postprocessing.IPostProcessor",
key = ContextualPostProcessor.PLUGIN_TYPE
)
public class ContextualPostProcessor extends ABasicPostProcessor<Double> {
/** serialVersionUID */
private static final long serialVersionUID = 4484708084267009957L;
/** Plugin key */
static final String PLUGIN_TYPE = "CTX";
/** Ordinal of the time dimension */
protected int timeDimensionOrdinal = -1;
/** Constructor */
public ContextualPostProcessor(String name, IActivePivot pivot) {
super(name, pivot);
}
@Override
public String getType() { return PLUGIN_TYPE; }
@Override
public void init(Properties properties) throws QuartetException {
super.init(properties);
// Store the ordinal of the time dimension
timeDimensionOrdinal = Util.findDimension(pivot.getDimensions(), "TimeBucket");
}
@Override
protected Double doEvaluation(ILocation location, Object[] underlyingMeasures) throws QuartetException {
if(location.getLevelDepth(timeDimensionOrdinal - 1) > 1) {
return (Double) underlyingMeasures[0];
} else {
return (Double) underlyingMeasures[1];
}
}
}
以下是如何在多维数据集描述中声明后处理器:
<measure name="ctx" isIntrospectionMeasure="false">
<!-- This post processor dynamically buckets an underlying measure -->
<!-- It works together with a dynamic bucket dimension. -->
<postProcessor pluginKey="CTX">
<properties>
<entry key="id" value="SUM" />
<entry key="underlyingMeasures" value="pv.SUM,pnl.SUM" />
</properties>
</postProcessor>
</measure>