/**
* <copyright>
* </copyright>
*
* $Id$
*/
package tefkat.engine.runtime.impl;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.NotificationChain;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.impl.ENotificationImpl;
import org.eclipse.emf.ecore.util.EObjectContainmentEList;
import org.eclipse.emf.ecore.util.InternalEList;
import tefkat.engine.runtime.Binding;
import tefkat.engine.runtime.BindingPair;
import tefkat.engine.runtime.Context;
import tefkat.engine.runtime.NotGroundException;
import tefkat.engine.runtime.ResolutionException;
import tefkat.engine.runtime.WrappedVar;
import tefkat.engine.runtime.Expression;
import tefkat.engine.runtime.Injection;
import tefkat.engine.runtime.RuntimePackage;
import tefkat.engine.runtime.VarUse;
/**
* <!-- begin-user-doc -->
* An implementation of the model object '<em><b>Injection</b></em>'.
* <!-- end-user-doc -->
* <p>
* The following features are implemented:
* <ul>
* <li>{@link tefkat.engine.runtime.impl.InjectionImpl#getName <em>Name</em>}</li>
* <li>{@link tefkat.engine.runtime.impl.InjectionImpl#getSources <em>Sources</em>}</li>
* <li>{@link tefkat.engine.runtime.impl.InjectionImpl#getTarget <em>Target</em>}</li>
* </ul>
* </p>
*
* @generated
*/
public class InjectionImpl extends TargetTermImpl implements Injection {
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public static final String copyright = "Copyright michael lawley 2004";
/**
* The default value of the '{@link #getName() <em>Name</em>}' attribute.
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @see #getName()
* @generated
* @ordered
*/
protected static final String NAME_EDEFAULT = null;
/**
* The cached value of the '{@link #getName() <em>Name</em>}' attribute.
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @see #getName()
* @generated
* @ordered
*/
protected String name = NAME_EDEFAULT;
/**
* The cached value of the '{@link #getSources() <em>Sources</em>}' containment reference list.
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @see #getSources()
* @generated
* @ordered
*/
protected EList sources = null;
/**
* The cached value of the '{@link #getTarget() <em>Target</em>}' containment reference.
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @see #getTarget()
* @generated
* @ordered
*/
protected VarUse target = null;
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
protected InjectionImpl() {
super();
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
protected EClass eStaticClass() {
return RuntimePackage.Literals.INJECTION;
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public String getName() {
return name;
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public void setName(String newName) {
String oldName = name;
name = newName;
if (eNotificationRequired())
eNotify(new ENotificationImpl(this, Notification.SET, RuntimePackage.INJECTION__NAME, oldName, name));
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public EList getSources() {
if (sources == null) {
sources = new EObjectContainmentEList(Expression.class, this, RuntimePackage.INJECTION__SOURCES);
}
return sources;
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public VarUse getTarget() {
return target;
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public NotificationChain basicSetTarget(VarUse newTarget, NotificationChain msgs) {
VarUse oldTarget = target;
target = newTarget;
if (eNotificationRequired()) {
ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, RuntimePackage.INJECTION__TARGET, oldTarget, newTarget);
if (msgs == null) msgs = notification; else msgs.add(notification);
}
return msgs;
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public void setTarget(VarUse newTarget) {
if (newTarget != target) {
NotificationChain msgs = null;
if (target != null)
msgs = ((InternalEObject)target).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - RuntimePackage.INJECTION__TARGET, null, msgs);
if (newTarget != null)
msgs = ((InternalEObject)newTarget).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - RuntimePackage.INJECTION__TARGET, null, msgs);
msgs = basicSetTarget(newTarget, msgs);
if (msgs != null) msgs.dispatch();
}
else if (eNotificationRequired())
eNotify(new ENotificationImpl(this, Notification.SET, RuntimePackage.INJECTION__TARGET, newTarget, newTarget));
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, NotificationChain msgs) {
switch (featureID) {
case RuntimePackage.INJECTION__SOURCES:
return ((InternalEList)getSources()).basicRemove(otherEnd, msgs);
case RuntimePackage.INJECTION__TARGET:
return basicSetTarget(null, msgs);
}
return super.eInverseRemove(otherEnd, featureID, msgs);
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public Object eGet(int featureID, boolean resolve, boolean coreType) {
switch (featureID) {
case RuntimePackage.INJECTION__NAME:
return getName();
case RuntimePackage.INJECTION__SOURCES:
return getSources();
case RuntimePackage.INJECTION__TARGET:
return getTarget();
}
return super.eGet(featureID, resolve, coreType);
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public void eSet(int featureID, Object newValue) {
switch (featureID) {
case RuntimePackage.INJECTION__NAME:
setName((String)newValue);
return;
case RuntimePackage.INJECTION__SOURCES:
getSources().clear();
getSources().addAll((Collection)newValue);
return;
case RuntimePackage.INJECTION__TARGET:
setTarget((VarUse)newValue);
return;
}
super.eSet(featureID, newValue);
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public void eUnset(int featureID) {
switch (featureID) {
case RuntimePackage.INJECTION__NAME:
setName(NAME_EDEFAULT);
return;
case RuntimePackage.INJECTION__SOURCES:
getSources().clear();
return;
case RuntimePackage.INJECTION__TARGET:
setTarget((VarUse)null);
return;
}
super.eUnset(featureID);
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public boolean eIsSet(int featureID) {
switch (featureID) {
case RuntimePackage.INJECTION__NAME:
return NAME_EDEFAULT == null ? name != null : !NAME_EDEFAULT.equals(name);
case RuntimePackage.INJECTION__SOURCES:
return sources != null && !sources.isEmpty();
case RuntimePackage.INJECTION__TARGET:
return target != null;
}
return super.eIsSet(featureID);
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public String toString() {
if (eIsProxy()) return super.toString();
StringBuffer result = new StringBuffer(super.toString());
result.append(" (name: ");
result.append(name);
result.append(')');
return result.toString();
}
public void ensure(Context context) throws ResolutionException, NotGroundException {
List keySet = new ArrayList();
List sources = getSources();
for (Iterator itr = sources.iterator(); itr.hasNext(); ) {
Expression expr = (Expression) itr.next();
// System.out.println("Eval: " + expr);
List vals = expr.eval(context);
if (vals.size() == 1 && vals.get(0) instanceof WrappedVar) {
WrappedVar wVar = (WrappedVar) vals.get(0);
Collection instances = context.expand(wVar);
List pairs = new ArrayList(instances.size());
for (Iterator instItr = instances.iterator(); instItr.hasNext(); ) {
Object o = instItr.next();
BindingPair bp = new BindingPair(o);
bp.add(wVar.getVar(), o);
pairs.add(bp);
}
keySet.add(pairs);
// ruleEval.fireInfo(expr + DELAYING_MESSAGE);
// context.delay(expr + NOT_BOUND_MESSAGE);
} else {
keySet.add(vals);
}
}
// do expr eval before we create things in case we need to delay
Object targetVal = getTarget().eval(context).get(0); // Can only be one thing
keySet = buildCrossProduct(keySet);
for (Iterator itr = keySet.iterator(); itr.hasNext(); ) {
List keys = (List) itr.next();
keys.add(0, getName());
EObject targetObject = context.lookup(keys, getTRuleTgt());
Binding unifier = new Binding();
for (Iterator keyItr = keys.iterator(); keyItr.hasNext(); ) {
Object k = keyItr.next();
if (k instanceof BindingPair) {
unifier.composeRight((BindingPair) k);
}
}
if (targetVal instanceof WrappedVar) {
unifier.add(((WrappedVar) targetVal).getVar(), targetObject);
} else if (!targetVal.equals(targetObject)) {
context.error("Incompatible values for variable: " + getTarget().getVar());
}
context.createBranch(unifier);
}
}
/**
*
* @param values a List of Lists
* @return
*/
private static List buildCrossProduct(List values) {
if (values.size() == 0) {
List result = new ArrayList(1);
result.add(new ArrayList());
return result;
}
Collection vals = (Collection) values.remove(0);
if (values.size() == 0) {
List result = new ArrayList(vals.size());
for (Iterator itr = vals.iterator(); itr.hasNext(); ) {
List l = new ArrayList();
l.add(itr.next());
result.add(l);
}
return result;
}
List xp = buildCrossProduct(values);
List result = new ArrayList();
for (Iterator itr = xp.iterator(); itr.hasNext(); ) {
Collection l = (Collection) itr.next();
for (Iterator itr2 = vals.iterator(); itr2.hasNext(); ) {
Object o2 = itr2.next();
List l2 = new ArrayList(l);
l2.add(0, o2);
result.add(l2);
}
}
return result;
}
} //InjectionImpl