Package com.bc.ceres.jai.operator

Class ExpressionDescriptor

  • All Implemented Interfaces:
    Serializable, javax.media.jai.OperationDescriptor, javax.media.jai.RegistryElementDescriptor
    public class ExpressionDescriptor
extends javax.media.jai.OperationDescriptorImpl
    An OperationDescriptor describing the "Expression" operation.

    The Expression operation creates a single-banded, tiled rendered image, where all the samples are computed from a given mathematical (Java) expression.

    See Also:
    Serialized Form

    • Field Summary

      • Fields inherited from interface javax.media.jai.OperationDescriptor

        NO_PARAMETER_DEFAULT

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static javax.media.jai.RenderedOp create​(Map<String,​RenderedImage> sources, int dataType, String expression, ExpressionCompilerConfig compilerConfig, RenderingHints hints)
      Creates an expression image.
      protected boolean validateParameters​(String modeName, ParameterBlock args, StringBuffer message)
      Validates the parameters.
      protected boolean validateSources​(String modeName, ParameterBlock args, StringBuffer message)
      Validates the sources.

      • Methods inherited from class javax.media.jai.OperationDescriptorImpl

        arePropertiesSupported, getDefaultSourceClass, getDestClass, getDestClass, getInvalidRegion, getName, getNumParameters, getNumSources, getParamClasses, getParamDefaults, getParamDefaultValue, getParameterListDescriptor, getParamMaxValue, getParamMinValue, getParamNames, getPropertyGenerators, getPropertyGenerators, getRenderableDestClass, getRenderableSourceClasses, getResourceBundle, getResources, getSourceClasses, getSourceClasses, getSourceNames, getSupportedModes, isImmediate, isModeSupported, isRenderableSupported, isRenderedSupported, makeDefaultSourceClassList, validateArguments, validateArguments, validateParameters, validateRenderableArguments, validateRenderableSources, validateSources

    • Constructor Detail

      • ExpressionDescriptor

        public ExpressionDescriptor()
        Constructor.

    • Method Detail

      • validateSources

        protected boolean validateSources​(String modeName,
                                  ParameterBlock args,
                                  StringBuffer message)
        Validates the sources.
        Overrides:
        validateSources in class javax.media.jai.OperationDescriptorImpl

      • validateParameters

        protected boolean validateParameters​(String modeName,
                                     ParameterBlock args,
                                     StringBuffer message)
        Validates the parameters.
        Overrides:
        validateParameters in class javax.media.jai.OperationDescriptorImpl

      • create

        public static javax.media.jai.RenderedOp create​(Map<String,​RenderedImage> sources,
                                                int dataType,
                                                String expression,
                                                ExpressionCompilerConfig compilerConfig,
                                                RenderingHints hints)
        Creates an expression image.

        Creates a ParameterBlockJAI from all supplied arguments except hints and invokes JAI.create(String,ParameterBlock,RenderingHints).

        Parameters:
        sources - The name-to-source map.
        dataType - The destination image's data type.
        expression - The mathematical expression.
        compilerConfig - The configuration for the Java expression compiler.
        hints - The RenderingHints to use. May be null.
        Returns:
        The RenderedOp destination.
        Throws:
        IllegalArgumentException - if expression is invalid.