exp.py
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# encoding: utf-8
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import gvsig |
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from org.gvsig.expressionevaluator.spi import AbstractFunction |
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from org.gvsig.expressionevaluator import ExpressionEvaluatorLocator |
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from org.apache.commons.lang3 import Range |
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from java.lang import Integer |
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class PixelXFunc(AbstractFunction): |
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def __init__(self, pixelx): |
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self.pixelx = pixelx
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AbstractFunction.__init__( |
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self,
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"Kernel Algorithm",
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"pixelx",
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Range.is(Integer(0)),
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"Return the pixel coordinate x",
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"pixelx()",
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None,
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"Double"
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) |
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def call(self, interpreter, args): |
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return self.pixelx |
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from org.gvsig.expressionevaluator.spi import AbstractSymbolTable |
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from org.gvsig.fmap.dal import DataManager |
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class KernelSymbolTable(AbstractSymbolTable): |
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def __init__(self, x): |
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AbstractSymbolTable.__init__(self, DataManager.DAL_SYMBOL_TABLE)
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self.pixelx = x
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self.addFunction(PixelXFunc(self.pixelx)) |
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def setX(self, x): |
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self.pixelx= x
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def main(*args): |
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manager = ExpressionEvaluatorLocator.getManager() |
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exp = manager.createExpression() |
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exp.setPhrase("pixelx()")
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symbol = KernelSymbolTable(15)
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ev = exp.execute(symbol) |
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print ev #muestra 15 |
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symbol.setX(5)
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ev = exp.execute(symbol) |
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print ev #muestra 15 |
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