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/* |
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$Id$ |
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Copyright (C) 2013 Nicklas Nordborg |
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This file is part of BASE - BioArray Software Environment. |
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Available at http://base.thep.lu.se/ |
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BASE is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 3 |
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of the License, or (at your option) any later version. |
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BASE is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with BASE. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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package net.sf.basedb.util.jep; |
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import java.util.Stack; |
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import org.nfunk.jep.ParseException; |
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/** |
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A simple base class for registering a JEP function by name and number |
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of parameters. The default implementation will simply return a random |
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number between 0 and 100. This is intended to be re-implemented by |
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subclasses. |
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@author nicklas |
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@since 3.3 |
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*/ |
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public class SimpleJepFunction |
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implements JepFunction |
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{ |
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private final String name; |
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private final int numParameters; |
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private int actualParameters; |
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public SimpleJepFunction(String name, int numParameters) |
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{ |
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this.name = name; |
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this.numParameters = numParameters; |
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} |
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|
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/* |
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From the JepFunction interface |
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------------------------------------------- |
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*/ |
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@Override |
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public String getFunctionName() |
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{ |
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return name; |
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} |
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// ------------------------------------------- |
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@Override |
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public int getNumberOfParameters() |
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{ |
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return numParameters; |
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} |
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@Override |
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public boolean checkNumberOfParameters(int n) |
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{ |
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return numParameters < 0 || n == numParameters; |
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} |
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@Override |
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public void setCurNumberOfParameters(int actualParameters) |
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{ |
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this.actualParameters = actualParameters; |
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} |
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@SuppressWarnings({ "unchecked", "rawtypes" }) |
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@Override |
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public void run(Stack stack) |
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throws ParseException |
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{ |
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int parameters = numParameters < 0 ? actualParameters : numParameters; |
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for (int i = 0; i < parameters; ++i) |
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{ |
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stack.pop(); |
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} |
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stack.push(Math.random()*100); |
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} |
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} |