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/** |
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$Id$ |
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Copyright (C) 2007 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.convert; |
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import net.sf.basedb.core.BaseException; |
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import net.sf.basedb.core.query.Expression; |
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import org.nfunk.jep.ASTConstant; |
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/** |
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Converts a constant node to an expression. |
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@author nicklas |
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@version 2.4 |
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@base.modified $Date$ |
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*/ |
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public class ASTConstantConverter |
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extends AbstractJepConversionFunction<ASTConstant> |
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{ |
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|
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public ASTConstantConverter() |
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{} |
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|
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/* |
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From the JepConversionFunction interface |
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------------------------------------------- |
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*/ |
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/** |
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Get the value from the constant node and check the {@link ConverterFactory} for |
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a registered converter for the class and use it. |
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@return An expression or null if the value is null |
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@throws BaseException If the node can't be converted |
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*/ |
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@SuppressWarnings({ "unchecked", "rawtypes" }) |
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@Override |
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public Expression toExpression(ASTConstant node) |
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{ |
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Expression e = null; |
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Object value = node.getValue(); |
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if (value != null) |
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{ |
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JepConversionFunction converter = ConverterFactory.getConverterByClass(value); |
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if (converter != null) |
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{ |
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e = converter.toExpression(value); |
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} |
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if (e == null) |
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{ |
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throw new BaseException("Unsupported JEP constant: " + value.getClass().getName()); |
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} |
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} |
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return e; |
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} |
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// ------------------------------------------- |
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|
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} |