svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / function / numeric / LogFunction.java @ 44009
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package org.gvsig.expressionevaluator.impl.function.numeric; |
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import org.apache.commons.lang3.Range; |
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import org.gvsig.expressionevaluator.Interpreter; |
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import org.gvsig.expressionevaluator.spi.AbstractFunction; |
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public class LogFunction extends AbstractFunction { |
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public LogFunction() {
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super("Numeric", "LOG", Range.is(1)); |
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this.addAlias("LN"); |
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} |
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@Override
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public boolean allowConstantFolding() { |
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return true; |
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} |
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@Override
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public Object call(Interpreter interpreter, Object[] args) { |
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double r = Math.log(getDouble(args, 0)); |
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return r;
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} |
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} |