Java Doc for ClassificationFunction.java in  » GIS » GeoTools-2.4.1 » org » geotools » filter » function » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.filter.function   Source Cross Reference   Class Diagram   Java Document (Java Doc)   org.geotools.filter.DefaultExpression    org.geotools.filter.function.ClassificationFunction All known Subclasses:   org.geotools.filter.function.QuantileFunction,  org.geotools.filter.function.StandardDeviationFunction,  org.geotools.filter.function.UniqueIntervalFunction,  org.geotools.filter.function.EqualIntervalFunction, ClassificationFunction abstract public class ClassificationFunction extends DefaultExpression implements FunctionExpression(Code) Parent for classifiers which break a feature collection into the specified number of classes. author:    James Macgill author:    Cory Horner, Refractions Research Inc. Field Summary final protected static  java.util.logging.Logger LOGGER       String name       List params       ProgressListener progress      Constructor Summary public   ClassificationFunction()      Creates a new instance of ClassificationFunction. Method Summary public  Object accept(ExpressionVisitor visitor, Object extraData)      protected  int decimalPlaces(double slotWidth)      Determines the number of decimal places to truncate the interval at. public  Object evaluate(Feature feature)      abstract public  Object evaluate(Object arg)      protected  double fixRound(double value, int decimalPlaces, boolean up)      Corrects a round off operation by incrementing or decrementing the decimal place (preferably the smallest one). abstract public  int getArgCount()      public  Expression[] getArgs()      public  int getClasses()      public  Expression getExpression()      public  Map getImplementationHints()      Returns the implementation hints. public  String getName()      Gets the name of this function. public  int getNumberOfClasses()      public  List getParameters()      Returns the function parameters (the contents are Expressions, usually attribute expression and literal expression). public  ProgressListener getProgressListener()      protected  double round(double value, int decimalPlaces)      Truncates a double to a certain number of decimals places. public  void setArgs(Expression[] args)      public  void setClasses(int classes)      public  void setExpression(Expression e)      public  void setName(String name)      Sets the name of the function. public  void setNumberOfClasses(int classes)      public  void setParameters(List params)      Sets the function parameters. public  void setProgressListener(ProgressListener progress)      Field Detail LOGGER final protected static java.util.logging.Logger LOGGER(Code) name String name(Code) function name * params List params(Code) function params * progress ProgressListener progress(Code) Constructor Detail ClassificationFunction public ClassificationFunction()(Code) Creates a new instance of ClassificationFunction. Subclasses should call setName Method Detail accept public Object accept(ExpressionVisitor visitor, Object extraData)(Code) See Also:   org.opengis.filter.expression.Expression.accept(ExpressionVisitorObject) decimalPlaces protected int decimalPlaces(double slotWidth)(Code) Determines the number of decimal places to truncate the interval at. Parameters:   slotWidth - evaluate public Object evaluate(Feature feature)(Code) evaluate abstract public Object evaluate(Object arg)(Code) fixRound protected double fixRound(double value, int decimalPlaces, boolean up)(Code) Corrects a round off operation by incrementing or decrementing the decimal place (preferably the smallest one). This should usually be used to adjust the bounds to include a value. Example: 0.31-->0.44 where 0.44 is the maximum value and end of the range. We could just make the , round(0.31, 1)=0.3; round(0.44 max value = 0.49 Parameters:   value - Parameters:   decimalPlaces - Parameters:   up - getArgCount abstract public int getArgCount()(Code) getArgs public Expression[] getArgs()(Code) getClasses public int getClasses()(Code) getExpression public Expression getExpression()(Code) getImplementationHints public Map getImplementationHints()(Code) Returns the implementation hints. The default implementation returns an empty map. getName public String getName()(Code) Gets the name of this function. the name of the function. getNumberOfClasses public int getNumberOfClasses()(Code) getParameters public List getParameters()(Code) Returns the function parameters (the contents are Expressions, usually attribute expression and literal expression). getProgressListener public ProgressListener getProgressListener()(Code) round protected double round(double value, int decimalPlaces)(Code) Truncates a double to a certain number of decimals places. Note: truncation at zero decimal places will still show up as x.0, since we're using the double type. Parameters:   value - number to round-off Parameters:   decimalPlaces - number of decimal places to leave the rounded value setArgs public void setArgs(Expression[] args)(Code) setClasses public void setClasses(int classes)(Code) setExpression public void setExpression(Expression e)(Code) setName public void setName(String name)(Code) Sets the name of the function. setNumberOfClasses public void setNumberOfClasses(int classes)(Code) setParameters public void setParameters(List params)(Code) Sets the function parameters. setProgressListener public void setProgressListener(ProgressListener progress)(Code) Fields inherited from org.geotools.filter.DefaultExpression protected short expressionType(Code)(Java Doc) protected boolean permissiveConstruction(Code)(Java Doc) Methods inherited from org.geotools.filter.DefaultExpression final public void accept(FilterVisitor visitor)(Code)(Java Doc) public Object evaluate(Feature feature)(Code)(Java Doc) public Object evaluate(Object object)(Code)(Java Doc) public short getType()(Code)(Java Doc) final public Object getValue(Feature feature)(Code)(Java Doc) protected static boolean isAttributeExpression(short expressionType)(Code)(Java Doc) protected static boolean isExpression(short expressionType)(Code)(Java Doc) public static boolean isFunctionExpression(short expressionType)(Code)(Java Doc) protected static boolean isGeometryExpression(short expressionType)(Code)(Java Doc) protected static boolean isLiteralExpression(short expressionType)(Code)(Java Doc) protected static boolean isMathExpression(short expressionType)(Code)(Java Doc) protected static boolean isMathExpression(org.opengis.filter.expression.Expression expression)(Code)(Java Doc)