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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 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.aai.edges;
import org.onap.aai.edges.enums.AAIDirection;
import org.onap.aai.edges.enums.EdgeField;
import org.onap.aai.edges.enums.EdgeProperty;
import org.onap.aai.edges.enums.EdgeType;
import org.onap.aai.setup.Version;
import com.jayway.jsonpath.Filter;
import com.jayway.jsonpath.Predicate;
import static com.jayway.jsonpath.Filter.filter;
import java.util.ArrayList;
import java.util.List;
import static com.jayway.jsonpath.Criteria.where;
/**
* For querying the edge rules schema (not the database)
*
*/
public class EdgeRuleQuery {
private Filter filter;
private Version v;
private String nodeA;
private String nodeB;
private String label;
private EdgeType type;
public static class Builder {
//required
private String nodeA;
//optional - null will translate to any value of the param
private String nodeB = null;
private String label = null;
private EdgeType type = null;
private Version version = Version.getLatest(); //default
public Builder(String nodeA) {
this.nodeA = nodeA;
}
public Builder(String nodeA, String nodeB) {
this.nodeA = nodeA;
this.nodeB = nodeB;
}
private String getFirstNodeType() {
return nodeA;
}
private String getSecondNodeType() {
return nodeB;
}
public Builder label(String label) {
this.label = label;
return this;
}
private String getLabel() {
return label;
}
public Builder edgeType(EdgeType type) {
this.type = type;
return this;
}
private EdgeType getEdgeType() {
return type;
}
public Builder version(Version version) {
this.version = version;
return this;
}
private Version getVersion() {
return version;
}
public EdgeRuleQuery build() {
return new EdgeRuleQuery(this);
}
}
private EdgeRuleQuery(Builder builder) {
this.v = builder.getVersion();
this.nodeA = builder.getFirstNodeType();
this.nodeB = builder.getSecondNodeType();
this.label = builder.getLabel();
this.type = builder.getEdgeType();
//will cover from A to B case
List<Predicate> criteriaFromTo = new ArrayList<>();
criteriaFromTo.add(buildToFromPart(builder.getFirstNodeType(), builder.getSecondNodeType()));
//will cover from B to A case - must be separate bc jsonpath won't let me OR predicates >:C
List<Predicate> criteriaToFrom = new ArrayList<>();
criteriaToFrom.add(buildToFromPart(builder.getSecondNodeType(), builder.getFirstNodeType()));
if (builder.getLabel() != null) {
Predicate labelPred = addLabel(builder.getLabel());
criteriaFromTo.add(labelPred);
criteriaToFrom.add(labelPred);
}
if (builder.getEdgeType() != null) {
Predicate typePred = addType(builder.getEdgeType());
criteriaFromTo.add(typePred);
criteriaToFrom.add(typePred);
}
this.filter = filter(criteriaFromTo).or(filter(criteriaToFrom));
}
private Predicate buildToFromPart(String from, String to) {
if (from == null && to == null) { //shouldn't ever happen though
throw new IllegalStateException("must have at least one node defined");
}
Predicate p;
if (to == null) {
p = where(EdgeField.FROM.toString()).is(from);
} else if (from == null) {
p = where(EdgeField.TO.toString()).is(to);
} else {
p = where(EdgeField.FROM.toString()).is(from).and(EdgeField.TO.toString()).is(to);
}
return p;
}
private Predicate addLabel(String label) {
return where(EdgeField.LABEL.toString()).is(label);
}
private Predicate addType(EdgeType type) {
if (type == EdgeType.COUSIN) {
return where(EdgeProperty.CONTAINS.toString()).is(AAIDirection.NONE.toString());
} else { //equals TREE
return where(EdgeProperty.CONTAINS.toString()).ne(AAIDirection.NONE.toString());
}
}
/**
* Provides the JsonPath filter for actually querying the edge rule schema files
* @return Filter
*/
public Filter getFilter() {
return this.filter;
}
/**
* So the Ingestor knows which version of the rules to search
* @return the Version
*/
public Version getVersion() {
return this.v;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("EdgeRuleQuery with filter params node type: ").append(nodeA);
if (nodeB != null) {
sb.append(", node type: ").append(nodeB);
}
if (label != null) {
sb.append(", label: ").append(label);
}
sb.append(", type: ");
if (type != null) {
sb.append(type.toString());
} else {
sb.append("any");
}
sb.append(", for version: ").append(v.toString()).append(".");
return sb.toString();
}
}
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