/*
* JBoss, Home of Professional Open Source.
*
* See the LEGAL.txt file distributed with this work for information regarding copyright ownership and licensing.
*
* See the AUTHORS.txt file distributed with this work for a full listing of individual contributors.
*/
package org.teiid.designer.core.invocation;
import java.lang.reflect.Method;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.InternalEObject;
import org.teiid.designer.core.util.InvocationFactoryHelper;
/**
* EmfInvocationFactoryHelper
*
* @since 8.0
*/
public class EmfInvocationFactoryHelper implements InvocationFactoryHelper {
/**
* Construct an instance of EmfInvocationFactoryHelper.
*
*/
public EmfInvocationFactoryHelper() {
super();
}
/**
* Return whether this invocation is known to modify the object. This is intended to be used
* in conjunction with the {@link org.teiid.designer.core.invocation.StandardInvocationFactoryHelper}.
* <p>
* The following logic is used to determine whether an invocation is considered writable:
* <ul>
* <li>return <code>false</code> if the name is <code>eGet</code> (see {@link EObject})</li>
* <li>return <code>false</code> if the name is <code>eIsProxy</code> (see {@link EObject})</li>
* <li>return <code>false</code> if the name is <code>eIsSet</code> (see {@link EObject})</li>
* <li>return <code>false</code> if the name is <code>eClass</code> (see {@link EObject})</li>
* <li>return <code>false</code> if the name is <code>eStaticClass (see {@link EObject})</code></li>
* <li>return <code>false</code> if the name is <code>eURIFragmentSegment</code> (see {@link InternalEObject})</li>
* <li>return <code>false</code> if the name is <code>eInternalResource</code> (see {@link InternalEObject})</li>
* <li>return <code>false</code> if the name is <code>eDerivedStructuralFeatureID</code> (see {@link InternalEObject})</li>
* <li>return <code>false</code> if the name is <code>eContainerFeatureID</code> (see {@link InternalEObject})</li>
* <li>return <code>false</code> if the name is <code>eBaseStructuralFeatureID</code> (see {@link InternalEObject})</li>
* <li>otherwise return <code>true</code></li>
* </ul>
* </p>
* <p>
* This method caches the determination of whether the method may modify the target object,
* so repetitive calls to this method are not expensive.
* Subclasses wishing to specialize this behavior should consider overriding the
* {@link #determineIsWriteMethod()} method.
* </p>
* @return {@link #WRITABLE} if this invocation is known to alter the state of the target object,
* {@link #READ_ONLY} if the invocation is known to <i>not</i> alter the state,
* or {@link #WRITABLE_UNKNOWN} if such a determination could not be made.
*/
@Override
public int isWrite(final Method method) {
final String methodName = method.getName();
final Class targetClass = method.getDeclaringClass();
if ( EObject.class.isAssignableFrom(targetClass) ) {
if ( methodName.equals("eSet") ) { //$NON-NLS-1$
return WRITABLE;
}
if ( methodName.equals("eUnset") ) { //$NON-NLS-1$
return WRITABLE;
}
if ( methodName.equals("eIsProxy") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eIsSet") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eAllContents") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eClass") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eContainer") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eContainmentFeature") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eContents") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eGet") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eStaticClass") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eResource") ) { //$NON-NLS-1$
return READ_ONLY;
}
}
if ( InternalEObject.class.isAssignableFrom(targetClass) ) {
if ( methodName.equals("eURIFragmentSegment") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eInternalResource") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eDerivedStructuralFeatureID") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eContainerFeatureID") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eBaseStructuralFeatureID") ) { //$NON-NLS-1$
return READ_ONLY;
}
if ( methodName.equals("eProxyURI") ) { //$NON-NLS-1$
return READ_ONLY;
}
}
return WRITABLE_UNKNOWN;
}
/* (non-Javadoc)
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
// Check if instances are identical ...
if (this == obj) {
return true;
}
if ( obj == null ) {
return false;
}
// Check if object can be compared to this one
if (obj.getClass().equals(this.getClass()) ) {
// All instances of this class are considered identical
return true;
}
// Otherwise not comparable ...
return false;
}
/* (non-Javadoc)
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return 1;
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "EMF Invocation Factory Helper"; //$NON-NLS-1$
}
}