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• de.laures.cewolf: Javadoc index of package de.laures.cewolf.
Package Samples:
• de.laures.cewolf.util: Servlet based framework to render charts into a client's response stream.
• de.laures.cewolf.taglib.util: Framework classes for the tag library implementation.
• de.laures.cewolf.cpp
• de.laures.cewolf.dp
• de.laures.cewolf.event
• de.laures.cewolf.links
• de.laures.cewolf.storage
• de.laures.cewolf.taglib.html
• de.laures.cewolf.taglib.tags
• de.laures.cewolf.taglib
• de.laures.cewolf.tooltips
Classes:
• CewolfRenderer: The rendering servlet of Cewolf. It is resposible for writing an entire chart img into the response stream of the client. Everything needed for this is prepared already by the ChartImgTag resp. LegendTag. The ID of a chart image is passed to this servlet as a request parameter. After that the image object is retrieved from the server side session based image cache. This servlet must be configured in web.xml of the web application in order to use Cewolf services. The servlet's URL relative to the web apps root is used as the renderer attribute of the ChartImgTag resp. LegendTag in the JSP page.
• FileStorage: Storage for storing images as files in the web application directory as files _chart-XXXXX. Note that by default the files won't ever be removed. To remove saved images on VM exit set the FileStorage.deleteOnExit configuration parameter to "true". For example: storage de.laures.cewolf.storage.FileStorage FileStorage.deleteOnExit true
• RotatedAxisLabels: A cewolf post-processor for rotating and/or removing the labels on the X-Axis parameters: rotate_at: make the labels vertical skip_at: print only some of the labels (so they don't overlap) remove_at: don't print any labels Usage: '/> '/> '/>
• ChartImageRenderListener: Event listener called back after the image is rendered. ChartPostProcessors may implement this interface to get notified when the image gets rendered. It is useful to retrieve the JFreeChart's ChartRenderingInfo object. public void onImageRendered (RenderedImage renderedImage) { ChartRenderingInfo info = (ChartRenderingInfo) renderedImage.renderingInfo; ... }
• ChartPostProcessor: Postprocesses a generated chart instance. Objects of this class can be used to customize a generated and afterwards rendered chart instance additionally. To provide a postprocessor the <chartpostprocessor> tag is used. There can be an unlimited number of postprocessors registered.
• ChartImgTag: This is the tag implementation of the <img> tag. This tag inputs the proper <img> tag into the HTML page delivered to the client. It therefor determines the chart ID which will be used by the rendering servlet to retrieve the chart.
• LongTermSessionStorage: Storage stores images in session, but expires them after a certain time. This expiration time defaults to 300 seconds, and can be changed by adding the timeout="xxx" parameter to and tags.
• DataTag: Tag <data> which nests the data definition of the chart. Currently only the <producer> tag is supported. Future versions will define further tags to provide data via SQL, CVS or XML directly in the JSP.
• WebConstants: Contains some base constants to avoid explicit dependancy to concrete chart implementation's constant values. The constants of this class also serve as the base contract for data exchange between sub packages.
• ChartConstants: Contains some base constants to avoid explicit dependancy to concrete chart implementation's constant values. The constants of this class also serve as the base contract for data exchange between sub packages.
• LayoutConstants: Contains some base constants to avoid explicit dependancy to concrete chart implementation's constant values. The constants of this class also serve as the base contract for data exchange between sub packages.
• TaglibConstants: Contains some base constants to avoid explicit dependancy to concrete chart implementation's constant values. The constants of this class also serve as the base contract for data exchange between sub packages.
• PlotConstants: Contains some base constants to avoid explicit dependancy to concrete Plot implementation's constant values. The constants of this class also serve as the base contract for data exchange between sub packages.
• Storage: Pluggable storage. Implement this class to change the storage concept which Cewolf uses to store chart imanges and provide the implementation class name as init paramter storage for Cewolf servlet.
• PlotTypes: Contains the list of all possible plot type string values which can be used in the type attribute of a <chart> tag. It also contains all the renders that correspond with the plot types
• CategoryItemLinkGenerator: A link generator for category items. This interface is used by the tag library to produce image maps. Implement this if the dataset that ths DatasetProducer produces is a CategoryDataset.
• AbstractChartTag: Root tag <chart> of a chart definition. Defines all values for the page scope variable of type ChartDefinition which is used by the img tag to render the appropriate chart.
• CewolfChartFactory: Chart factory creates Jfreechart instances. To add a new factory use the CewolfChartFactory.registerFactory(new CewolfChartFactory() {...}); method.
• ChartHolder: An object of this type represents a full descritption of a chart. Therefore it is able to produce the chart and dataset object resulting out of this definition.
• LayoutTypes: Contains the list of all possible layout type string values which can be used in the layout attribute of a <combined-chart> tag.
• ConfigurationException: Thrown by an object which handles the production of a specific chart instance when detecting an incorrect or unconsistent configuration.
• ChartTypes: Contains the list of all possible chart type string values which can be used in the type attribute of a <chart> tag.
• AxisTypes: Contains the list of all possible axis type string values which can be used in the type attribute of a <plot> tag.
• PointTag: Tag <point> which adds a colored point with x and y coordinates to the parent tag. This must implement the Pointed interface.
• ParamTag: Tag <param> which defines a key/value pair which is set in the parent tag. This must implement the Parameterized interface.
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