/*******************************************************************************
* Copyright (c) 2012 Red Hat, Inc.
* Distributed under license by Red Hat, Inc. All rights reserved.
* This program is 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:
* Red Hat, Inc. - initial API and implementation
******************************************************************************/
package com.openshift.internal.client.response;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.openshift.client.IField;
import com.openshift.client.Message;
import com.openshift.client.Messages;
import com.openshift.client.OpenShiftException;
import com.openshift.internal.client.utils.IOpenShiftJsonConstants;
import com.openshift.internal.client.utils.StringUtils;
/**
* A factory for creating ResourceDTO objects.
*
* @author Xavier Coulon
* @author Andre Dietisheim
*/
public abstract class AbstractJsonDTOFactory implements IRestResponseFactory {
private final Logger LOGGER = LoggerFactory.getLogger(AbstractJsonDTOFactory.class);
@Override
public RestResponse get(final String json) throws OpenShiftException {
// in case the server answers with 'no-content'
if (StringUtils.isEmpty(json)) {
return null;
}
LOGGER.trace("Unmarshalling response\n{}", json);
final ModelNode rootNode = getModelNode(json);
final String type = getAsString(rootNode, IOpenShiftJsonConstants.PROPERTY_TYPE);
final String status = getAsString(rootNode, IOpenShiftJsonConstants.PROPERTY_STATUS);
final Messages messages = createMessages(rootNode.get(IOpenShiftJsonConstants.PROPERTY_MESSAGES));
final EnumDataType dataType = EnumDataType.safeValueOf(type);
final ModelNode dataNode = rootNode.get(IOpenShiftJsonConstants.PROPERTY_DATA);
Object data = null;
if (dataNode.isDefined()) {
data = createData(dataType, messages, rootNode.get(IOpenShiftJsonConstants.PROPERTY_DATA));
}
return new RestResponse(status, messages, data, dataType);
}
abstract protected Object createData(EnumDataType dataType, Messages messages, ModelNode dataNode);
/**
* Creates a new ResourceDTO object.
*
* @param messagesNode
* the messages node
* @return the list< string>
*/
private Messages createMessages(ModelNode messagesNode) {
Map<IField, List<Message>> messagesByField = new LinkedHashMap<IField, List<Message>>();
if (messagesNode.getType() == ModelType.LIST) {
for (ModelNode messageNode : messagesNode.asList()) {
Message message = createMessage(messageNode);
List<Message> messages = (List<Message>) messagesByField.get(message.getField());
if (messages == null) {
messages = new ArrayList<Message>();
}
messages.add(message);
messagesByField.put(message.getField(), messages);
}
}
return new Messages(messagesByField);
}
private Message createMessage(ModelNode messageNode) {
String text = getAsString(messageNode, IOpenShiftJsonConstants.PROPERTY_TEXT);
String field = getAsString(messageNode, IOpenShiftJsonConstants.PROPERTY_FIELD);
int exitCode = getAsInteger(messageNode, IOpenShiftJsonConstants.PROPERTY_EXIT_CODE);
String severity = getAsString(messageNode, IOpenShiftJsonConstants.PROPERTY_SEVERITY);
return new Message(text, field, severity, exitCode);
}
/**
* Gets the model node.
*
* @param content
* the content
* @return the model node
* @throws OpenShiftException
* the open shift exception
*/
protected ModelNode getModelNode(final String content) throws OpenShiftException {
if (content == null) {
throw new OpenShiftException("Could not unmarshall response: no content.");
}
final ModelNode node = ModelNode.fromJSONString(content);
if (!node.isDefined()) {
throw new OpenShiftException("Could not unmarshall response: erroneous content.");
}
return node;
}
/**
* Returns the property identified by the given name in the given model
* node, or null if the named property is undefined.
*
* @param node
* the model node
* @param propertyName
* the name of the property
* @return the property as a String
*/
protected String getAsString(final ModelNode node, String propertyName) {
final ModelNode propertyNode = node.get(propertyName);
return propertyNode.isDefined() ? propertyNode.asString() : null;
}
/**
* Returns the property identified by the given name in the given model node, or null if the named property is
* undefined.
*
* @param node
* the model node
* @param propertyName
* the name of the property
* @return the property as a String
*/
protected Boolean getAsBoolean(final ModelNode node, String propertyName) {
final ModelNode propertyNode = node.get(propertyName);
return propertyNode.isDefined() ? propertyNode.asBoolean() : Boolean.FALSE;
}
/**
* Returns the property identified by the given name in the given model node, or null if the named property is
* undefined.
*
* @param node
* the model node
* @param propertyName
* the name of the property
* @return the property as an Integer
*/
protected int getAsInteger(final ModelNode node, String propertyName) {
final ModelNode propertyNode = node.get(propertyName);
return propertyNode.isDefined() ? propertyNode.asInt() : -1;
}
protected boolean isDefined(ModelNode node) {
return node != null
&& node.isDefined();
}
}