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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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|
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import java.util.Collection; |
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import java.util.HashMap; |
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import java.util.Map; |
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|
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import net.sf.basedb.core.ItemAlreadyExistsException; |
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import net.sf.basedb.core.query.Expression; |
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import net.sf.basedb.core.query.Restriction; |
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|
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import org.nfunk.jep.ASTConstant; |
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import org.nfunk.jep.ASTFunNode; |
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import org.nfunk.jep.ASTVarNode; |
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import org.nfunk.jep.function.Abs; |
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import org.nfunk.jep.function.Add; |
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import org.nfunk.jep.function.Divide; |
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import org.nfunk.jep.function.Exp; |
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import org.nfunk.jep.function.If; |
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import org.nfunk.jep.function.Logarithm; |
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import org.nfunk.jep.function.Multiply; |
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import org.nfunk.jep.function.NaturalLogarithm; |
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import org.nfunk.jep.function.Not; |
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import org.nfunk.jep.function.SquareRoot; |
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import org.nfunk.jep.function.Subtract; |
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import org.nfunk.jep.function.UMinus; |
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/** |
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Keep {@link JepConversionFunction} objects for converting built-in |
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JEP object to Query API {@link Expression} or {@link Restriction} |
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objects. |
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|
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@author nicklas |
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@version 2.4 |
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@see JepConversionFunction |
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@base.modified $Date$ |
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*/ |
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public class ConverterFactory |
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{ |
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private static Map<Object, JepConversionFunction<?>> converters = |
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new HashMap<Object, JepConversionFunction<?>>(); |
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|
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/** |
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Register the built-in functions, operators and node types. |
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*/ |
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static |
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{ |
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// Basic nodes types |
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converters.put(ASTFunNode.class, new ASTFunNodeConverter()); |
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converters.put(ASTVarNode.class, new ASTVarNodeConverter()); |
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converters.put(ASTConstant.class, new ASTConstantConverter()); |
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|
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// Built-in operators |
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converters.put(Add.class, new AddConverter()); |
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converters.put(Subtract.class, new SubtractConverter()); |
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converters.put(Multiply.class, new MultiplyConverter()); |
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converters.put(Divide.class, new DivideConverter()); |
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converters.put(UMinus.class, new UMinusConverter()); |
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converters.put("==", new EqualsConverter()); |
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converters.put("!=", new NotEqualsConverter()); |
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converters.put(">", new GreaterConverter()); |
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converters.put(">=", new GreaterEqualsConverter()); |
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converters.put("<", new LessConverter()); |
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converters.put("<=", new LessEqualsConverter()); |
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converters.put("&&", new AndConverter()); |
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converters.put("||", new OrConverter()); |
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converters.put(Not.class, new NotConverter()); |
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|
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// Built-in functions |
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converters.put(Logarithm.class, new LogarithmConverter()); |
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converters.put(NaturalLogarithm.class, new NaturalLogarithmConverter()); |
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converters.put(SquareRoot.class, new SquareRootConverter()); |
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converters.put(Abs.class, new AbsConverter()); |
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converters.put(Exp.class, new ExpConverter()); |
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converters.put(If.class, new IfConverter()); |
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|
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// Constant values |
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converters.put(Integer.class, new IntegerConverter()); |
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FloatConverter fc = new FloatConverter(); |
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converters.put(Float.class, fc); |
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converters.put(Double.class, fc); |
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converters.put(String.class, new StringConverter()); |
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|
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} |
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/** |
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Get a converter for the specified built-in JEP object. |
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@param o The object to convert |
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@return A {@link JepConversionFunction} or null if no converter is found |
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*/ |
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public static JepConversionFunction<?> getConverter(Object o) |
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{ |
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if (o == null) return null; |
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return converters.get(o); |
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} |
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|
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/** |
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Get a converter for the specified built-in JEP object by checking if |
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a converter has been registered for it's class. |
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@param o The object to convert |
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@return A {@link JepConversionFunction} or null if no converter is found |
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*/ |
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public static JepConversionFunction<?> getConverterByClass(Object o) |
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{ |
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if (o == null) return null; |
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return converters.get(o.getClass()); |
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} |
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|
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/** |
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Add a converter for a specific object. It can for example, be the class |
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of a JEP function, the symbol for an operator: |
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<pre class="code"> |
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registerConverter(Add.class, new AddConverter()); |
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registerConverter("==", new EqualsConverter()); |
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</pre> |
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|
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@param o The object defining what the converter can convert |
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@param converter The converter |
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@throws ItemAlreadyExistsException If a converter already exists for the given class |
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*/ |
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public static void registerConverter(Object o, JepConversionFunction<?> converter) |
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{ |
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if (o == null) throw new NullPointerException("o"); |
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if (converter == null) throw new NullPointerException("converter"); |
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if (converters.containsKey(o)) |
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{ |
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throw new ItemAlreadyExistsException("A converter for is already registered for object: " + o); |
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} |
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synchronized (converters) |
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{ |
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converters.put(o, converter); |
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} |
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} |
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|
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/** |
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Get all registered converters. |
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*/ |
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public static Collection<JepConversionFunction<?>> getConverters() |
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{ |
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return converters.values(); |
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} |
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|
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} |