| /* |
| * Copyright (c) 2013, 2014 Eike Stepper (Berlin, Germany) and others. |
| * 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: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.emf.cdo.expressions.impl; |
| |
| import org.eclipse.emf.cdo.expressions.EvaluationContext; |
| import org.eclipse.emf.cdo.expressions.Expression; |
| import org.eclipse.emf.cdo.expressions.ExpressionsPackage; |
| import org.eclipse.emf.cdo.expressions.Invocation; |
| |
| import org.eclipse.emf.internal.cdo.CDOObjectImpl; |
| |
| import org.eclipse.net4j.util.WrappedException; |
| |
| import org.eclipse.emf.common.notify.NotificationChain; |
| import org.eclipse.emf.common.util.BasicEList; |
| import org.eclipse.emf.common.util.EList; |
| import org.eclipse.emf.ecore.EClass; |
| import org.eclipse.emf.ecore.EOperation; |
| import org.eclipse.emf.ecore.InternalEObject; |
| import org.eclipse.emf.ecore.util.InternalEList; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.Collection; |
| import java.util.List; |
| |
| /** |
| * <!-- begin-user-doc --> |
| * An implementation of the model object '<em><b>Invocation</b></em>'. |
| * <!-- end-user-doc --> |
| * <p> |
| * The following features are implemented: |
| * <ul> |
| * <li>{@link org.eclipse.emf.cdo.expressions.impl.InvocationImpl#getArguments <em>Arguments</em>}</li> |
| * <li>{@link org.eclipse.emf.cdo.expressions.impl.InvocationImpl#getName <em>Name</em>}</li> |
| * </ul> |
| * </p> |
| * |
| * @generated |
| */ |
| public abstract class InvocationImpl extends CDOObjectImpl implements Invocation |
| { |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| protected InvocationImpl() |
| { |
| super(); |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| @Override |
| protected EClass eStaticClass() |
| { |
| return ExpressionsPackage.Literals.INVOCATION; |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| @Override |
| protected int eStaticFeatureCount() |
| { |
| return 0; |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| @SuppressWarnings("unchecked") |
| public EList<Expression> getArguments() |
| { |
| return (EList<Expression>)eDynamicGet(ExpressionsPackage.INVOCATION__ARGUMENTS, |
| ExpressionsPackage.Literals.INVOCATION__ARGUMENTS, true, true); |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| public Expression getName() |
| { |
| return (Expression)eDynamicGet(ExpressionsPackage.INVOCATION__NAME, ExpressionsPackage.Literals.INVOCATION__NAME, |
| true, true); |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| public NotificationChain basicSetName(Expression newName, NotificationChain msgs) |
| { |
| msgs = eDynamicInverseAdd((InternalEObject)newName, ExpressionsPackage.INVOCATION__NAME, msgs); |
| return msgs; |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| public void setName(Expression newName) |
| { |
| eDynamicSet(ExpressionsPackage.INVOCATION__NAME, ExpressionsPackage.Literals.INVOCATION__NAME, newName); |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated NOT |
| */ |
| public Object evaluate(EvaluationContext context) |
| { |
| String name = (String)getName().evaluate(context); |
| |
| EList<Expression> arguments = getArguments(); |
| int size = arguments.size(); |
| |
| Object[] evaluatedArguments = new Object[size]; |
| for (int i = 0; i < evaluatedArguments.length; i++) |
| { |
| Expression argument = arguments.get(i); |
| evaluatedArguments[i] = argument.evaluate(context); |
| } |
| |
| List<Invocable> invocables = new BasicEList<Invocable>(); |
| collectInvocables(context, name, invocables); |
| |
| Invocable invocable = selectInvocable(invocables, evaluatedArguments); |
| return invocable.invoke(evaluatedArguments); |
| } |
| |
| protected abstract boolean staticModifier(); |
| |
| protected abstract void collectInvocables(EvaluationContext context, String name, List<Invocable> invocables); |
| |
| protected void collectMethods(Object object, Class<?> c, String name, List<Invocable> invocables) |
| { |
| for (Method method : c.getMethods()) |
| { |
| boolean static1 = Modifier.isStatic(method.getModifiers()); |
| boolean staticModifier = staticModifier(); |
| String name2 = method.getName(); |
| if (name2.equals(name) && static1 == staticModifier) |
| { |
| invocables.add(createMethod(object, method)); |
| } |
| } |
| } |
| |
| protected Invocable createMethod(final Object object, final Method method) |
| { |
| return new Invocable() |
| { |
| public String getName() |
| { |
| return method.getName(); |
| } |
| |
| public Class<?>[] getParameterTypes() |
| { |
| return method.getParameterTypes(); |
| } |
| |
| public Object invoke(Object[] arguments) |
| { |
| try |
| { |
| return method.invoke(object, arguments); |
| } |
| catch (RuntimeException ex) |
| { |
| throw ex; |
| } |
| catch (Exception ex) |
| { |
| throw WrappedException.wrap(ex); |
| } |
| } |
| |
| @Override |
| public String toString() |
| { |
| return method.toString(); |
| } |
| }; |
| } |
| |
| protected Invocable selectInvocable(List<Invocable> invocables, Object[] arguments) |
| { |
| Invocable result = null; |
| for (Invocable invocable : invocables) |
| { |
| Class<?>[] parameterTypes = invocable.getParameterTypes(); |
| if (isAssignable(parameterTypes, arguments)) |
| { |
| if (result != null) |
| { |
| throw new IllegalStateException("Ambiguous invocation: " + invocable.getName() + arguments); |
| } |
| |
| result = invocable; |
| } |
| } |
| |
| return result; |
| } |
| |
| protected boolean isAssignable(Class<?>[] parameterTypes, Object[] arguments) |
| { |
| if (parameterTypes.length != arguments.length) |
| { |
| return false; |
| } |
| |
| for (int i = 0; i < parameterTypes.length; i++) |
| { |
| Class<?> parameterType = box(parameterTypes[i]); |
| Class<?> argumentType = arguments[i].getClass(); |
| if (!parameterType.isAssignableFrom(argumentType)) |
| { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| protected Class<?> box(Class<?> type) |
| { |
| if (type.isPrimitive()) |
| { |
| if (type == boolean.class) |
| { |
| return Boolean.class; |
| } |
| |
| if (type == char.class) |
| { |
| return Character.class; |
| } |
| |
| if (type == byte.class) |
| { |
| return Byte.class; |
| } |
| |
| if (type == short.class) |
| { |
| return Short.class; |
| } |
| |
| if (type == int.class) |
| { |
| return Integer.class; |
| } |
| |
| if (type == long.class) |
| { |
| return Long.class; |
| } |
| |
| if (type == float.class) |
| { |
| return Float.class; |
| } |
| |
| if (type == double.class) |
| { |
| return Double.class; |
| } |
| } |
| |
| return type; |
| } |
| |
| protected Class<?>[] getTypes(Object[] objects) |
| { |
| Class<?>[] types = new Class<?>[objects.length]; |
| for (int i = 0; i < objects.length; i++) |
| { |
| Object object = objects[i]; |
| types[i] = object == null ? Object.class : object.getClass(); |
| } |
| |
| return types; |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| @Override |
| public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, NotificationChain msgs) |
| { |
| switch (featureID) |
| { |
| case ExpressionsPackage.INVOCATION__ARGUMENTS: |
| return ((InternalEList<?>)getArguments()).basicRemove(otherEnd, msgs); |
| case ExpressionsPackage.INVOCATION__NAME: |
| return basicSetName(null, msgs); |
| } |
| return super.eInverseRemove(otherEnd, featureID, msgs); |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| @Override |
| public Object eGet(int featureID, boolean resolve, boolean coreType) |
| { |
| switch (featureID) |
| { |
| case ExpressionsPackage.INVOCATION__ARGUMENTS: |
| return getArguments(); |
| case ExpressionsPackage.INVOCATION__NAME: |
| return getName(); |
| } |
| return super.eGet(featureID, resolve, coreType); |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| @SuppressWarnings("unchecked") |
| @Override |
| public void eSet(int featureID, Object newValue) |
| { |
| switch (featureID) |
| { |
| case ExpressionsPackage.INVOCATION__ARGUMENTS: |
| getArguments().clear(); |
| getArguments().addAll((Collection<? extends Expression>)newValue); |
| return; |
| case ExpressionsPackage.INVOCATION__NAME: |
| setName((Expression)newValue); |
| return; |
| } |
| super.eSet(featureID, newValue); |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| @Override |
| public void eUnset(int featureID) |
| { |
| switch (featureID) |
| { |
| case ExpressionsPackage.INVOCATION__ARGUMENTS: |
| getArguments().clear(); |
| return; |
| case ExpressionsPackage.INVOCATION__NAME: |
| setName((Expression)null); |
| return; |
| } |
| super.eUnset(featureID); |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| @Override |
| public boolean eIsSet(int featureID) |
| { |
| switch (featureID) |
| { |
| case ExpressionsPackage.INVOCATION__ARGUMENTS: |
| return !getArguments().isEmpty(); |
| case ExpressionsPackage.INVOCATION__NAME: |
| return getName() != null; |
| } |
| return super.eIsSet(featureID); |
| } |
| |
| /** |
| * <!-- begin-user-doc --> |
| * <!-- end-user-doc --> |
| * @generated |
| */ |
| @Override |
| public Object eInvoke(int operationID, EList<?> arguments) throws InvocationTargetException |
| { |
| switch (operationID) |
| { |
| case ExpressionsPackage.INVOCATION___EVALUATE__EVALUATIONCONTEXT: |
| return evaluate((EvaluationContext)arguments.get(0)); |
| } |
| return super.eInvoke(operationID, arguments); |
| } |
| |
| /** |
| * An abstraction of something that can be invoked, for example an {@link EOperation} or a {@link Method}. |
| * |
| * @author Eike Stepper |
| */ |
| public interface Invocable |
| { |
| public String getName(); |
| |
| public Class<?>[] getParameterTypes(); |
| |
| public Object invoke(Object[] arguments); |
| } |
| |
| } // InvocationImpl |