/*
* JBoss, Home of Professional Open Source.
* Copyright 2014, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.patching.validation;
import org.jboss.as.patching.installation.InstalledIdentity;
/**
* @author Emanuel Muckenhuber
*/
class BasicArtifactProcessor implements PatchingArtifactProcessor {
private InstalledIdentity currentIdentity;
private InstalledIdentity next;
private final PatchHistoryValidations.PatchingArtifactStateHandlers handlers;
private final PatchingArtifactValidationContext context;
// The current node
private Node current;
public BasicArtifactProcessor(final InstalledIdentity installedIdentity, final PatchingValidationErrorHandler errorHandler,
final PatchHistoryValidations.PatchingArtifactStateHandlers handlers) {
assert installedIdentity != null;
assert errorHandler != null;
assert handlers != null;
this.context = new PatchingArtifactValidationContext() {
@Override
public PatchingValidationErrorHandler getErrorHandler() {
if (current.context != null) {
return current.context;
}
return errorHandler;
}
@Override
public InstalledIdentity getInstalledIdentity() {
return currentIdentity;
}
@Override
public void setCurrentPatchIdentity(InstalledIdentity currentPatchIdentity) {
if(currentPatchIdentity == null) {
throw new IllegalArgumentException();
}
next = currentPatchIdentity;
}
};
this.handlers = handlers;
currentIdentity = next = installedIdentity;
}
protected <P extends PatchingArtifact.ArtifactState, S extends PatchingArtifact.ArtifactState> boolean processRoot(PatchingArtifact<P, S> artifact, S state, PatchingValidationErrorHandler context) {
assert current == null;
current = new Node(null, artifact, state, context);
try {
return doProcess(artifact, state);
} finally {
// Swap identity for the next patch-id
currentIdentity = next;
current = null;
}
}
@Override
public <P extends PatchingArtifact.ArtifactState, S extends PatchingArtifact.ArtifactState> boolean process(PatchingArtifact<P, S> artifact, S state) {
final Node old = current;
current = new Node(old, artifact, state, old.context);
try {
return doProcess(artifact, state);
} finally {
current = old;
}
}
public <P extends PatchingArtifact.ArtifactState, S extends PatchingArtifact.ArtifactState> boolean doProcess(PatchingArtifact<P, S> artifact, S state) {
final PatchingArtifactStateHandler<S> handler = getHandlerForArtifact(artifact);
if (!state.isValid(getValidationContext())) {
return false;
}
// Process each child artifact
boolean valid = true;
for (final PatchingArtifact<S, ? extends PatchingArtifact.ArtifactState> child : artifact.getArtifacts()) {
if (!child.process(state, this)) {
valid = false;
}
}
if (valid && handler != null) {
handler.handleValidatedState(state);
}
return valid;
}
/**
* Get a state handler for a given patching artifact.
*
* @param artifact the patching artifact
* @param <P>
* @param <S>
* @return the state handler, {@code null} if there is no handler registered for the given artifact
*/
<P extends PatchingArtifact.ArtifactState, S extends PatchingArtifact.ArtifactState> PatchingArtifactStateHandler<S> getHandlerForArtifact(PatchingArtifact<P, S> artifact) {
return handlers.get(artifact);
}
@Override
public <P extends PatchingArtifact.ArtifactState, S extends PatchingArtifact.ArtifactState> S getParentArtifact(PatchingArtifact<P, S> artifact) {
Node node = current;
while (node != null) {
if (node.artifact == artifact) {
return (S) node.state;
}
node = node.parent;
}
return null;
}
@Override
public PatchingArtifactValidationContext getValidationContext() {
return context;
}
static class Node<P extends PatchingArtifact.ArtifactState, S extends PatchingArtifact.ArtifactState> {
private final S state;
private final Node parent;
private final PatchingArtifact<P, S> artifact;
private final PatchingValidationErrorHandler context;
Node(Node parent, PatchingArtifact<P, S> artifact, S state, PatchingValidationErrorHandler context) {
this.state = state;
this.parent = parent;
this.artifact = artifact;
this.context = context;
}
}
}