| /******************************************************************************* |
| * Copyright (c) 2004-2008 Andras Schmidt, Andras Balogh, Istvan Rath and Daniel Varro |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Andras Schmidt, Andras Balogh, Istvan Rath - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.viatra2.natives; |
| |
| // fqn: org.eclipse.viatra2.natives.AdderFun |
| import org.eclipse.viatra2.core.IModelSpace; |
| import org.eclipse.viatra2.errors.VPMRuntimeException; |
| import org.eclipse.viatra2.natives.NativeFunctionParameter.ParameterType; |
| |
| /** |
| * @author Istvan Rath |
| * |
| */ |
| @VIATRANativeFunction(name = "add", returns = { ParameterType.INTEGER, |
| ParameterType.DOUBLE, ParameterType.STRING }, params = { |
| @NativeFunctionParameter(name = "operand1", description = "first operand", type = { |
| ParameterType.INTEGER, ParameterType.DOUBLE, |
| ParameterType.STRING }), |
| @NativeFunctionParameter(name = "operand2", description = "second operand", type = { |
| ParameterType.INTEGER, ParameterType.DOUBLE, |
| ParameterType.STRING }), }, remark = "Operand types need to be of the same type at run-time (integer+double combinations are allowed).") |
| public class AdderFunction implements ASMNativeFunction { |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see |
| * org.eclipse.viatra2.natives.ASMNativeFunction#evaluate(org.eclipse.viatra2 |
| * .core.IModelSpace, java.lang.String[]) |
| */ |
| public Object evaluate(IModelSpace msp, Object[] params) |
| throws VPMRuntimeException { |
| if (params.length == 2) { |
| if ((params[0] instanceof Integer) |
| && (params[1] instanceof Integer)) |
| return new Integer(((Integer) params[0]).intValue() |
| + ((Integer) params[1]).intValue()); |
| if ((params[0] instanceof Double) && (params[1] instanceof Double)) |
| return new Double(((Double) params[0]).doubleValue() |
| + ((Double) params[1]).doubleValue()); |
| if ((params[0] instanceof String) && (params[1] instanceof String)) |
| return params[0].toString() + params[1].toString(); |
| if ((params[0] instanceof Integer) && (params[1] instanceof Double)) |
| return new Double(((Integer) params[0]).intValue() |
| + ((Double) params[1]).doubleValue()); |
| if ((params[0] instanceof Double) && (params[1] instanceof Integer)) |
| return new Double(((Double) params[0]).doubleValue() |
| + ((Integer) params[1]).intValue()); |
| |
| throw new VPMRuntimeException("Parameter type mismatch!"); |
| |
| } |
| throw new VPMRuntimeException("Parameter count mismatch!"); |
| } |
| |
| public String getName() { |
| return "add"; // VTCL
|
| } |
| |
| public String getDescription() { |
| return "adds the two parameters. Numbers are added, strings are concatenated."; |
| } |
| |
| public String getID() { |
| return this.getClass().getCanonicalName(); |
| } |
| |
| } |