/*
* JBoss, Home of Professional Open Source.
* Copyright 2012, 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.controller.transform;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.jboss.dmr.Property;
/**
* Handler that {@link OperationTransformer} and {@link ResourceTransformer} implementations can accept to
* delegate decisions about whether a given attribute requires transformation. An implementation of this class would
* perform a check appropriate to the {@link OperationTransformer} and {@link ResourceTransformer} with which it
* would be used.
*
* @author Brian Stansberry (c) 2012 Red Hat Inc.
*/
@FunctionalInterface
public interface AttributeTransformationRequirementChecker {
/**
* Gets whether the given attribute or parameter value is not understandable by the target process and needs
* to be transformed.
*
* @param attributeName the name of the attribute
* @param attributeValue the value of the attribute
* @param context the context of the transformation
*
* @return {@code true} if the attribute or parameter value is not understandable by the target process and also
* cannot be transformed, {@code false} otherwise
*/
boolean isAttributeTransformationRequired(String attributeName, ModelNode attributeValue, TransformationContext context);
AttributeTransformationRequirementChecker SIMPLE_EXPRESSIONS = new AttributeTransformationRequirementChecker() {
private final Pattern EXPRESSION_PATTERN = Pattern.compile(".*\\$\\{.*\\}.*");
@Override
public boolean isAttributeTransformationRequired(String attributeName, ModelNode attributeValue, TransformationContext context) {
return checkForExpression(attributeValue);
}
/**
* Check an attribute for expressions.
*
* @param node the attribute value
* @return whether an expression was found or not
*/
private boolean checkForExpression(final ModelNode node) {
if (!node.isDefined()) {
return false;
}
final ModelNode resolved = node.clone();
if (node.getType() == ModelType.EXPRESSION || node.getType() == ModelType.STRING) {
return checkForExpression(resolved.asString());
} else if (node.getType() == ModelType.OBJECT) {
for (Property prop : resolved.asPropertyList()) {
if(checkForExpression(prop.getValue())) {
return true;
}
}
} else if (node.getType() == ModelType.LIST) {
for (ModelNode current : resolved.asList()) {
if(checkForExpression(current)) {
return true;
}
}
} else if (node.getType() == ModelType.PROPERTY) {
return checkForExpression(resolved.asProperty().getValue());
}
return false;
}
private boolean checkForExpression(final String value) {
return EXPRESSION_PATTERN.matcher(value).matches();
}
};
class ListAttributeTransformationRequirementChecker implements AttributeTransformationRequirementChecker {
private final AttributeTransformationRequirementChecker elementChecker;
public ListAttributeTransformationRequirementChecker(AttributeTransformationRequirementChecker elementChecker) {
this.elementChecker = elementChecker;
}
@Override
public boolean isAttributeTransformationRequired(String attributeName, ModelNode attributeValue, TransformationContext context) {
if (attributeValue.isDefined()) {
for (ModelNode element : attributeValue.asList()) {
if (elementChecker.isAttributeTransformationRequired(attributeName, element, context)) {
return true;
}
}
}
return false;
}
}
AttributeTransformationRequirementChecker SIMPLE_LIST_EXPRESSIONS = new ListAttributeTransformationRequirementChecker(SIMPLE_EXPRESSIONS);
class ObjectFieldsAttributeTransformationRequirementChecker implements AttributeTransformationRequirementChecker {
private final Map<String, AttributeTransformationRequirementChecker> fields = new HashMap<String, AttributeTransformationRequirementChecker>();
public ObjectFieldsAttributeTransformationRequirementChecker(Map<String, AttributeTransformationRequirementChecker> fields) {
this.fields.putAll(fields);
}
@Override
public boolean isAttributeTransformationRequired(String attributeName, ModelNode attributeValue, TransformationContext context) {
for (Map.Entry<String, AttributeTransformationRequirementChecker> entry : fields.entrySet()) {
ModelNode fieldValue = attributeValue.hasDefined(entry.getKey()) ? attributeValue.get(entry.getKey()) : new ModelNode();
if (entry.getValue().isAttributeTransformationRequired(attributeName, fieldValue, context)) {
return true;
}
}
return false;
}
}
}