75 lines
2.3 KiB
Java
75 lines
2.3 KiB
Java
package org.gcube.informationsystem.resourceregistry.queries.json.base.entities;
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import org.gcube.com.fasterxml.jackson.databind.JsonNode;
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import org.gcube.informationsystem.base.reference.AccessType;
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import org.gcube.informationsystem.base.reference.Direction;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.queries.InvalidQueryException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.types.SchemaException;
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import org.gcube.informationsystem.resourceregistry.queries.json.base.relations.JsonQueryConsistsOf;
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/**
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* @author Luca Frosini (ISTI - CNR)
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*/
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public class JsonQueryFacet extends JsonQueryEntity {
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public final static String _IN = "_in";
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public JsonQueryFacet(JsonNode jsonQuery) throws SchemaException, ResourceRegistryException {
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super(jsonQuery, AccessType.FACET);
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fieldNamesToRemove.add(JsonQueryFacet._IN);
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}
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@Override
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public StringBuffer analize(StringBuffer stringBuffer) throws SchemaException, ResourceRegistryException {
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StringBuffer newBuffer = new StringBuffer();
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int size = jsonNode.size();
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boolean entry = entryPoint;
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if(jsonNode.has(_IN)) {
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if(!entryPoint) {
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throw new InvalidQueryException(_IN + " property cannot be used in a facet if it is not the entry object");
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}
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JsonNode consistsOfNode = jsonNode.get(_IN);
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JsonQueryConsistsOf jsonQueryConsistsOf = new JsonQueryConsistsOf(consistsOfNode);
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jsonQueryConsistsOf.setEntryPoint(entryPoint);
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jsonQueryConsistsOf.setDirection(Direction.OUT);
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stringBuffer = jsonQueryConsistsOf.analize(stringBuffer);
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entry = false;
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/* Need to substract 1 from size otherwise
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* it add WHERE at the end because _in
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* is not a property to be used for a WHERE compare
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*/
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--size;
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}
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newBuffer.append("SELECT FROM ");
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if(!entry) {
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newBuffer.append("( ");
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newBuffer.append("TRAVERSE inV(\"");
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}
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newBuffer.append(type);
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if(!entry) {
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newBuffer.append("\") FROM ( ");
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newBuffer.append(stringBuffer);
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newBuffer.append(")");
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newBuffer.append(")");
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}
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// Size 1 means that only '@class' property is present
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if(size > 1) {
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newBuffer.append(" WHERE ");
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newBuffer.append(addConstraints(jsonNode, null, null));
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}
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return newBuffer;
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}
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}
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