| /* |
| * |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| * |
| * |
| */ |
| |
| package org.apache.usergrid.persistence.index.query; |
| |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.usergrid.persistence.index.SelectFieldMapping; |
| import org.apache.usergrid.persistence.index.exceptions.QueryParseException; |
| import org.apache.usergrid.persistence.index.query.tree.DirectOperand; |
| import org.apache.usergrid.persistence.index.query.tree.Operand; |
| |
| |
| /** |
| * Our object that represents our parsed query |
| */ |
| public class ParsedQuery { |
| |
| //fast lookup for our sort predicates |
| private Set<String> sortPropertyNames = new HashSet<>(); |
| |
| //The sort predicates ordered by their input order in the grammar |
| private List<SortPredicate> sortPredicateList = new ArrayList<>(); |
| |
| /** |
| * Our map that contains field mappings |
| */ |
| private Map<String, SelectFieldMapping> fieldMappings = new HashMap<>(); |
| |
| /** |
| * The root operand of our query |
| */ |
| private Operand rootOperand; |
| |
| private String originalQuery; |
| |
| |
| /** |
| * Get the original query |
| * @return |
| */ |
| public String getOriginalQuery() { |
| return originalQuery; |
| } |
| |
| |
| /** |
| * Set the original query |
| * @param originalQuery |
| */ |
| public void setOriginalQuery( final String originalQuery ) { |
| this.originalQuery = originalQuery; |
| } |
| |
| |
| /** |
| * Set the root operand of our query tree |
| * @param rootOperand |
| * @return |
| */ |
| public ParsedQuery setRootOperand(final Operand rootOperand){ |
| this.rootOperand = rootOperand; |
| |
| return this; |
| } |
| |
| |
| /** |
| * Get our field mappings from the parsed query |
| * @return |
| */ |
| public Collection<SelectFieldMapping> getSelectFieldMappings(){ |
| return fieldMappings.values(); |
| } |
| |
| /** |
| * Add a sort predicate to our list |
| */ |
| public ParsedQuery addSort( final SortPredicate sort ) { |
| if ( sort == null ) { |
| return this; |
| } |
| |
| final String sortPropertyName = sort.getPropertyName(); |
| |
| if ( sortPropertyNames.contains( sortPropertyName ) ) { |
| throw new QueryParseException( |
| String.format( "Attempted to set sort order for %s more than once", sort.getPropertyName() ) ); |
| } |
| |
| |
| sortPredicateList.add( sort ); |
| sortPropertyNames.add( sortPropertyName ); |
| |
| return this; |
| } |
| |
| |
| /** |
| * Get the list of sort predicates |
| * @return |
| */ |
| public List<SortPredicate> getSortPredicates() { |
| return sortPredicateList; |
| } |
| |
| |
| /** |
| * Possiblly add a single select to our results |
| */ |
| public ParsedQuery addSelect( final String select ) { |
| |
| final String normalizedSelect = getSelect( select ); |
| |
| if ( normalizedSelect == null ) { |
| return this; |
| } |
| |
| fieldMappings.put( select, new SelectFieldMapping( normalizedSelect, normalizedSelect ) ); |
| |
| return this; |
| } |
| |
| |
| /** |
| * Use this when the user does a "select id:mynewidname " in the select clause of the grammar |
| * @param select |
| * @param output |
| * @return |
| */ |
| public ParsedQuery addSelect( final String select, final String output ) { |
| final String normalizedSelect = getSelect( select ); |
| |
| if ( normalizedSelect == null ) { |
| return this; |
| } |
| |
| final String normalizedOutput = getSelect( output ); |
| |
| if ( normalizedOutput == null ) { |
| return this; |
| } |
| |
| |
| fieldMappings.put( select, new SelectFieldMapping( normalizedSelect, normalizedOutput ) ); |
| |
| return this; |
| } |
| |
| |
| /** |
| * Get the field for select. This trims the field and validates the input. If the field is not valid, null willl |
| * be returned. If null is returned, the caller should short circuit. |
| */ |
| private String getSelect( final String select ) { |
| // be paranoid with the null checks because |
| // the query parser sometimes flakes out |
| if ( select == null ) { |
| return null; |
| } |
| |
| final String trimmedSelect = select.trim(); |
| |
| if ( trimmedSelect.equals( "*" ) ) { |
| return null; |
| } |
| |
| return trimmedSelect; |
| } |
| |
| |
| /** |
| * Get the root operand |
| * @return |
| */ |
| public Operand getRootOperand() { |
| return rootOperand; |
| } |
| |
| public boolean isGeoQuery(){ |
| return getOriginalQuery().contains("location") && getOriginalQuery().contains("within"); |
| } |
| |
| public boolean isDirectQuery() { |
| return rootOperand instanceof DirectOperand; |
| } |
| |
| public int getDirectQueryItemCount() { |
| int count = 0; |
| if (rootOperand instanceof DirectOperand) { |
| DirectOperand root = (DirectOperand)rootOperand; |
| count = root.getChildCount(); |
| } |
| return count; |
| } |
| } |