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/*-
* ============LICENSE_START=======================================================
* ONAP : CCSDK
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights
* reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.ccsdk.sli.core.sli.provider;
import org.onap.ccsdk.sli.core.sli.BreakNodeException;
import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
import org.onap.ccsdk.sli.core.sli.SvcLogicException;
import org.onap.ccsdk.sli.core.sli.SvcLogicExpression;
import org.onap.ccsdk.sli.core.sli.SvcLogicNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class WhileNodeExecutor extends SvcLogicNodeExecutor {
private static final Logger LOG = LoggerFactory.getLogger(WhileNodeExecutor.class);
@Override
public SvcLogicNode execute(SvcLogicService svc, SvcLogicNode node, SvcLogicContext ctx) throws SvcLogicException {
String testResult = evaluateNodeTest(node, ctx);
SvcLogicExpression silentFailureExpr = node.getAttribute("do");
String doWhile = SvcLogicExpressionResolver.evaluate(silentFailureExpr, node, ctx);
if ("true".equals(doWhile)) {
LOG.debug("While loop will execute once regardless of expression because do is set to true");
}
try {
while ("true".equals(testResult) || "true".equals(doWhile)) {
if (!"true".equals(doWhile)) {
LOG.debug("Test expression (" + node.getAttribute("test") + ") evaluates to true, executing loop.");
}
int numOutcomes = node.getNumOutcomes() + 1;
for (int i = 0; i < numOutcomes; i++) {
SvcLogicNode nextNode = node.getOutcomeValue("" + (i + 1));
if (nextNode != null) {
while (nextNode != null) {
nextNode = svc.executeNode(nextNode, ctx);
}
} else {
if ("true".equals(doWhile)) {
LOG.debug("Do executed, will only execute again if test expression is true.");
doWhile = "false";
}
testResult = evaluateNodeTest(node, ctx);
LOG.debug("test expression (" + node.getAttribute("test") + ") evaluates to " + testResult);
}
}
}
LOG.debug("testResult was " + testResult + " which is not equal to true, exiting while loop.");
} catch (BreakNodeException e) {
LOG.debug("WhileNodeExecutor caught break");
}
return (null);
}
}
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