Examples of org.jfree.report.data.PrecomputedValueRegistry

org.jfree.report.data.PrecomputedValueRegistry
Expression precomputation processes the report in a parallel process to retrieve the final value of an function. The final value of an expression is the value the expression would return before it goes out of scope. Precomputation can be generally considered expensive, so it should be done only once. During the precomputation run, no output is generated at all. Only named data-row expressions can be precomputed. @author Thomas Morgner

    {
      target.endElement(getAttributeMap());
    }


    FlowController fc = getFlowController();
    final PrecomputedValueRegistry pcvr =
        fc.getPrecomputedValueRegistry();
    // Step 2: Remove the expressions of this element
    final int expressionsCount = getExpressionsCount();
    if (expressionsCount != 0)
    {
      final ExpressionSlot[] activeExpressions = fc.getActiveExpressions();
      for (int i = activeExpressions.length - expressionsCount; i < activeExpressions.length; i++)
      {
        final ExpressionSlot slot = activeExpressions[i];
        pcvr.addFunction(slot.getName(), slot.getValue());
      }
      fc = fc.deactivateExpressions();
    }


    if (isPrecomputing() == false)
    {
      pcvr.finishElement(new ElementPrecomputeKey(e));
    }


    return fc;
  }

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      FlowController fc)
      throws ReportProcessingException, ReportDataFactoryException,
      DataSourceException
  {
    final Element element = getElement();
    final PrecomputedValueRegistry pcvr = fc.getPrecomputedValueRegistry();
    if (isPrecomputing() == false)
    {
      pcvr.startElement(new ElementPrecomputeKey(element));
    }


    if (expressions.length > 0)
    {
      final ExpressionSlot[] slots = new ExpressionSlot[expressions.length];
      final StaticExpressionRuntimeData runtimeData =
          LayoutControllerUtil.getStaticExpressionRuntime(fc, element);


      for (int i = 0; i < expressions.length; i++)
      {
        final Expression expression = expressions[i];
        if (isPrecomputing() == false && expression.isPrecompute())
        {
          // ok, we have to precompute the expression's value. For that
          // we fork a new layout process, compute the value and then come
          // back with the result.
          final Object value = LayoutControllerUtil.performPrecompute
              (i, new ElementPrecomputeKey(element),
                  this, getFlowController());
          slots[i] = new PrecomputedExpressionSlot(expression.getName(), value,
              expression.isPreserve());
        }
        else
        {
          // thats a bit easier; we dont have to do anything special ..
          slots[i] = new RunningExpressionSlot(expression, runtimeData,
              pcvr.currentNode());
        }
      }


      fc = fc.activateExpressions(slots);
    }

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                                         final FlowController flowController)
      throws ReportProcessingException, ReportDataFactoryException,
      DataSourceException
  {
    final FlowController fc = flowController.createPrecomputeInstance();
    final PrecomputedValueRegistry pcvr = fc.getPrecomputedValueRegistry();


    pcvr.startElementPrecomputation(nodeKey);


    final LayoutController rootLc = layoutController.createPrecomputeInstance(fc);
    final LayoutController rootParent = rootLc.getParent();
    final ReportTarget target = new EmptyReportTarget(fc.getReportJob(), fc.getExportDescriptor());


    LayoutController lc = rootLc;
    while (lc.isAdvanceable())
    {
      lc = lc.advance(target);
      while (lc.isAdvanceable() == false && lc.getParent() != null)
      {
        final LayoutController parent = lc.getParent();
        lc = parent.join(lc.getFlowController());
      }
    }


    target.commit();
    final PrecomputeNode precomputeNode = pcvr.currentNode();
    final Object functionResult = precomputeNode.getFunctionResult(expressionPosition);
    pcvr.finishElementPrecomputation(nodeKey);
    return functionResult;
//    throw new IllegalStateException
//        ("Ups - we did not get to the root parent again. This is awful and we cannot continue.");
  }

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                                         final FlowController flowController)
      throws ReportProcessingException, ReportDataFactoryException,
      DataSourceException
  {
    final FlowController fc = flowController.createPrecomputeInstance();
    final PrecomputedValueRegistry pcvr = fc.getPrecomputedValueRegistry();


    pcvr.startElementPrecomputation(nodeKey);
    //final PrecomputeNode startNode = pcvr.currentNode();
    final LayoutController rootLc = layoutController.createPrecomputeInstance(fc);
    final LayoutController rootParent = rootLc.getParent();
    final ReportTarget target = new EmptyReportTarget(fc.getReportJob(), fc.getExportDescriptor());


    LayoutController lc = rootLc;
    while (lc.isAdvanceable())
    {
      lc = lc.advance(target);
      while (lc.isAdvanceable() == false && lc.getParent() != null)
      {
        final LayoutController parent = lc.getParent();
        lc = parent.join(lc.getFlowController());


        if (parent == rootParent)
        {
          target.commit();
          final PrecomputeNode precomputeNode = pcvr.currentNode();
          final Object functionResult = precomputeNode.getFunctionResult(expressionPosition);
          pcvr.finishElementPrecomputation(nodeKey);
          return functionResult;
        }
      }
    }

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    {
      target.endElement(getAttributeMap());
    }


    FlowController fc = getFlowController();
    final PrecomputedValueRegistry pcvr =
        fc.getPrecomputedValueRegistry();
    // Step 2: Remove the expressions of this element
    final int expressionsCount = getExpressionsCount();
    if (expressionsCount != 0)
    {
      final ExpressionSlot[] activeExpressions = fc.getActiveExpressions();
      for (int i = activeExpressions.length - expressionsCount; i < activeExpressions.length; i++)
      {
        final ExpressionSlot slot = activeExpressions[i];
        pcvr.addFunction(slot.getName(), slot.getValue());
      }
      fc = fc.deactivateExpressions();
    }


    if (isPrecomputing() == false)
    {
      pcvr.finishElement(new ElementPrecomputeKey(e));
    }


    return fc;
  }

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      FlowController fc)
      throws ReportProcessingException, ReportDataFactoryException,
      DataSourceException
  {
    final Element element = getElement();
    final PrecomputedValueRegistry pcvr = fc.getPrecomputedValueRegistry();
    if (isPrecomputing() == false)
    {
      pcvr.startElement(new ElementPrecomputeKey(element));
    }


    if (expressions.length > 0)
    {
      final ExpressionSlot[] slots = new ExpressionSlot[expressions.length];
      final StaticExpressionRuntimeData runtimeData =
          LayoutControllerUtil.getStaticExpressionRuntime(fc, element);


      for (int i = 0; i < expressions.length; i++)
      {
        final Expression expression = expressions[i];
        if (isPrecomputing() == false && expression.isPrecompute())
        {
          // ok, we have to precompute the expression's value. For that
          // we fork a new layout process, compute the value and then come
          // back with the result.
          final Object value = LayoutControllerUtil.performPrecompute
              (i, new ElementPrecomputeKey(element),
                  this, getFlowController());
          slots[i] = new PrecomputedExpressionSlot(expression.getName(), value,
              expression.isPreserve());
        }
        else
        {
          // thats a bit easier; we dont have to do anything special ..
          slots[i] = new RunningExpressionSlot(expression, runtimeData,
              pcvr.currentNode());
        }
      }


      fc = fc.activateExpressions(slots);
    }

View Full Code Here

    {
      target.endElement(getAttributeMap());
    }


    FlowController fc = getFlowController();
    final PrecomputedValueRegistry pcvr =
        fc.getPrecomputedValueRegistry();
    // Step 2: Remove the expressions of this element
    final int expressionsCount = getExpressionsCount();
    if (expressionsCount != 0)
    {
      final ExpressionSlot[] activeExpressions = fc.getActiveExpressions();
      for (int i = activeExpressions.length - expressionsCount; i < activeExpressions.length; i++)
      {
        final ExpressionSlot slot = activeExpressions[i];
        pcvr.addFunction(slot.getName(), slot.getValue());
      }
      fc = fc.deactivateExpressions();
    }


    if (isPrecomputing() == false)
    {
      pcvr.finishElement(new ElementPrecomputeKey(e));
    }


    return fc;
  }

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      FlowController fc)
      throws ReportProcessingException, ReportDataFactoryException,
      DataSourceException
  {
    final Element element = getElement();
    final PrecomputedValueRegistry pcvr = fc.getPrecomputedValueRegistry();
    if (isPrecomputing() == false)
    {
      pcvr.startElement(new ElementPrecomputeKey(element));
    }


    if (expressions.length > 0)
    {
      final ExpressionSlot[] slots = new ExpressionSlot[expressions.length];
      final StaticExpressionRuntimeData runtimeData =
          LayoutControllerUtil.getStaticExpressionRuntime(fc, element);


      for (int i = 0; i < expressions.length; i++)
      {
        final Expression expression = expressions[i];
        if (isPrecomputing() == false && expression.isPrecompute())
        {
          // ok, we have to precompute the expression's value. For that
          // we fork a new layout process, compute the value and then come
          // back with the result.
          final Object value = LayoutControllerUtil.performPrecompute
              (i, new ElementPrecomputeKey(element),
                  this, getFlowController());
          slots[i] = new PrecomputedExpressionSlot(expression.getName(), value,
              expression.isPreserve());
        }
        else
        {
          // thats a bit easier; we dont have to do anything special ..
          slots[i] = new RunningExpressionSlot(expression, runtimeData,
              pcvr.currentNode());
        }
      }


      fc = fc.activateExpressions(slots);
    }

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                                         final FlowController flowController)
      throws ReportProcessingException, ReportDataFactoryException,
      DataSourceException
  {
    final FlowController fc = flowController.createPrecomputeInstance();
    final PrecomputedValueRegistry pcvr = fc.getPrecomputedValueRegistry();


    pcvr.startElementPrecomputation(nodeKey);


    final LayoutController rootLc = layoutController.createPrecomputeInstance(fc);
    final LayoutController rootParent = rootLc.getParent();
    final ReportTarget target = new EmptyReportTarget(fc.getReportJob(), fc.getExportDescriptor());


    LayoutController lc = rootLc;
    while (lc.isAdvanceable())
    {
      lc = lc.advance(target);
      while (lc.isAdvanceable() == false && lc.getParent() != null)
      {
        final LayoutController parent = lc.getParent();
        lc = parent.join(lc.getFlowController());
      }
    }


    target.commit();
    final PrecomputeNode precomputeNode = pcvr.currentNode();
    final Object functionResult = precomputeNode.getFunctionResult(expressionPosition);
    pcvr.finishElementPrecomputation(nodeKey);
    return functionResult;
//    throw new IllegalStateException
//        ("Ups - we did not get to the root parent again. This is awful and we cannot continue.");
  }

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Related Classes of org.jfree.report.data.PrecomputedValueRegistry

org.jfree.report.flow.layoutprocessor.ElementLayoutController

org.jfree.report.flow.layoutprocessor.LayoutControllerUtil

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