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/*******************************************************************************
* Copyright (c) 2001, 2006 Oracle Corporation 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:
* Oracle Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsf.validation.internal.appconfig;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.core.resources.IFile;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.wst.validation.internal.provisional.core.IMessage;
/**
*
* @author cbateman
*/
public abstract class EObjectValidationVisitor
{
private EStructuralFeature _structuralFeature;
private Map _childFeatures; // == null; lazy initialized in validate
private final String _version;
/**
* Used to indicate no child nodes
*/
protected final static EObjectValidationVisitor[] NO_CHILDREN =
new EObjectValidationVisitor[0];
/**
* @param version
*
*/
public EObjectValidationVisitor(String version)
{
_version = version;
}
private EObjectValidationVisitor getVisitorForFeature(EStructuralFeature feature)
{
if (_childFeatures == null)
{
_childFeatures = new HashMap();
EObjectValidationVisitor[] children = getChildNodeValidators();
for (int i = 0; i < children.length; i++)
{
final EObjectValidationVisitor child = children[i];
_childFeatures.put(child.getStructuralFeature(), child);
}
}
return (EObjectValidationVisitor) _childFeatures.get(feature);
}
/**
* @param structuralFeature
* @param version
*/
public EObjectValidationVisitor(EStructuralFeature structuralFeature, String version)
{
this(version);
_structuralFeature = structuralFeature;
}
/**
* @param eObject
* @param messages
* @param file
*/
public final void validate(EObject eObject, List messages, IFile file)
{
doValidate(eObject, messages, file);
List features = eObject.eClass().getEAllStructuralFeatures();
for (final Iterator it = features.iterator(); it.hasNext();)
{
final EStructuralFeature feature = (EStructuralFeature) it.next();
final EObjectValidationVisitor visitor =
getVisitorForFeature(feature);
if (visitor != null)
{
final Object obj = eObject.eGet(feature);
if (obj instanceof List
&& feature.isMany())
{
for (final Iterator childIt = ((List)obj).iterator();
childIt.hasNext();)
{
Object child = childIt.next();
if (child instanceof EObject)
{
visitor.validate((EObject)child, messages, file);
}
}
}
else if (obj instanceof EObject)
{
visitor.validate((EObject)obj , messages, file);
}
}
}
}
/**
* Do the validation for this visitor on this node. Add any Message's to
* the messages list
*
* @param eObject
* @param messages
* @param file
*/
protected abstract void doValidate(EObject eObject, List messages, IFile file);
/**
* @return an array of visitors that validate children of the current node
*/
protected abstract EObjectValidationVisitor[] getChildNodeValidators();
/**
* @return the structural feature
*/
protected final EStructuralFeature getStructuralFeature()
{
return _structuralFeature;
}
/**
* @return the version of the runtime
*/
protected final String getVersion()
{
return _version;
}
/**
* @param messages
* @param message
* @param eObj
* @param file
*/
protected static void addMessageInfo(List messages, IMessage message, EObject eObj, IFile file)
{
if (message != null)
{
message.setOffset(AppConfigValidationUtil.getStartOffset(eObj));
message.setLength(AppConfigValidationUtil.getLength(eObj));
message.setTargetObject(file);
messages.add(message);
}
}
}
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