public LuceneQueryPredicateExpression(LuceneQueryFieldExpression field, Expression pattern, Occur occur, QueryType queryType)
: base(typeof(bool), (ExpressionType)LuceneExpressionType.LuceneQueryPredicateExpression)
{
this.field = field;
this.pattern = pattern;
this.occur = occur;
this.queryType = queryType;
}
public LuceneRangeQueryExpression(LuceneQueryFieldExpression field, Expression lower, QueryType lowerQueryType, Expression upper, QueryType upperQueryType, Occur occur)
: base(typeof(bool), (ExpressionType)LuceneExpressionType.LuceneRangeQueryExpression)
{
this.field = field;
this.lower = lower;
this.lowerQueryType = lowerQueryType;
this.upper = upper;
this.upperQueryType = upperQueryType;
this.occur = occur;
}
private static void AssertResult(LuceneQueryPredicateExpression result, Occur expectedOccur)
{
Assert.That(result, Is.Not.Null, "Expected LuceneQueryPredicateExpression to be returned.");
Assert.That(result, Is.Not.SameAs(predicate));
Assert.That(result.QueryField, Is.SameAs(predicate.QueryField));
Assert.That(result.QueryPattern, Is.SameAs(predicate.QueryPattern));
Assert.That(result.QueryType, Is.EqualTo(predicate.QueryType));
Assert.That(result.Occur, Is.EqualTo(expectedOccur));
Assert.That(result.Boost, Is.EqualTo(predicate.Boost));
Assert.That(result.AllowSpecialCharacters, Is.EqualTo(predicate.AllowSpecialCharacters));
}
public static Filter CreateQuery(ISearchCriteria criteria, ISearchFilter filter, Occur clause)
{
var values = filter.GetValues();
if (values == null)
return null;
var query = new BooleanFilter();
foreach (var value in values)
{
var valueQuery = CreateQueryForValue(criteria, filter, value);
query.Add(new FilterClause(valueQuery, Occur.SHOULD));
}
return query;
}
/// <summary> Parses a query, searching on the fields specified. Use this if you need
/// to specify certain fields as required, and others as prohibited.
/// <p/>
///
/// <pre>
/// Usage:
/// <code>
/// String[] fields = {"filename", "contents", "description"};
/// BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
/// BooleanClause.Occur.MUST,
/// BooleanClause.Occur.MUST_NOT};
/// MultiFieldQueryParser.parse("query", fields, flags, analyzer);
/// </code>
/// </pre>
/// <p/>
/// The code above would construct a query:
///
/// <pre>
/// <code>
/// (filename:query) +(contents:query) -(description:query)
/// </code>
/// </pre>
///
/// </summary>
/// <param name="matchVersion">Lucene version to match; this is passed through to
/// QueryParser.
/// </param>
/// <param name="query">Query string to parse
/// </param>
/// <param name="fields">Fields to search on
/// </param>
/// <param name="flags">Flags describing the fields
/// </param>
/// <param name="analyzer">Analyzer to use
/// </param>
/// <throws> ParseException </throws>
/// <summary> if query parsing fails
/// </summary>
/// <throws> IllegalArgumentException </throws>
/// <summary> if the length of the fields array differs from the length of
/// the flags array
/// </summary>
public new static Query Parse(Lucene.Net.Util.Version matchVersion, string query, string[] fields, Occur[] flags, Analyzer analyzer)
{
if (fields.Length > flags.Length)
throw new System.ArgumentException("fields.length != flags.length");
BooleanQuery bQuery = new BooleanQuery();
for (int i = 0; i < fields.Length; i++)
{
QueryParser qp = new HebrewQueryParser(matchVersion, fields[i], analyzer);
Query q = qp.Parse(query);
if (q != null && (!(q is BooleanQuery) || ((BooleanQuery)q).GetClauses().Length > 0))
{
bQuery.Add(q, flags[i]);
}
}
return bQuery;
}
/// <summary>
/// Adds the content sub query.
/// </summary>
/// <param name="query">The boolean query.</param>
/// <param name="key">The field key.</param>
/// <param name="value">The field value.</param>
/// <param name="matchVariant">The match variant.</param>
/// <param name="condition">The condition.</param>
/// <param name="isFirst">if set to <c>true</c> [is first].</param>
private void AddContentSubQuery(LuceneSearch.BooleanQuery query, string key, string value, MatchVariant matchVariant, QueryCondition condition)
{
if (matchVariant == MatchVariant.NotEquals)
{
query.Add(new LuceneSearch.TermQuery(new Term(key, value)), LuceneSearch.Occur.MUST_NOT);
return;
}
LuceneSearch.Occur occurrence = this.GetOccur(condition);
LuceneSearch.TermRangeQuery rangeQuery = this.GetRangeQuery(key, value, matchVariant);
if (rangeQuery != null)
{
query.Add(rangeQuery, occurrence);
return;
}
string[] keywords = value.Split(' ');
if (keywords.Length > 1)
{
LuceneSearch.PhraseQuery phraseQuery = new Lucene.Net.Search.PhraseQuery();
foreach (string keyword in keywords)
{
phraseQuery.Add(new Term(key, keyword));
}
query.Add(phraseQuery, occurrence);
}
else if (matchVariant == MatchVariant.Like)
{
query.Add(new LuceneSearch.WildcardQuery(new Term(key, value + "*")), occurrence);
}
else
{
query.Add(new LuceneSearch.TermQuery(new Term(key, value)), occurrence);
}
}
public virtual void SetOccur(Occur occur)
{
this.occur = occur;
}
private void InitPendingClause() {
_occur = Occur.SHOULD;
_exactMatch = false;
_query = null;
_boost = 0;
_asFilter = false;
}
public ISearchBuilder Mandatory() {
_occur = Occur.MUST;
return this;
}
private static void TagClause(BooleanQuery query, Analyzer analyzer, IEnumerable<string> values, Occur occur)
{
query.Add(ConstructClauseQuery(analyzer, "Tags", values, Occur.SHOULD, 2.0f), occur);
}
private static void TitleClause(BooleanQuery query, Analyzer analyzer, IEnumerable<string> values, Occur occur)
{
if (occur == Occur.MUST)
{
BooleanQuery subQuery = new BooleanQuery();
query.Add(subQuery, Occur.MUST);
query = subQuery;
}
query.Add(ConstructClauseQuery(analyzer, "Title", values, Occur.SHOULD), Occur.SHOULD);
if (values.Count() > 1)
{
query.Add(ConstructClauseQuery(analyzer, "Title", values, Occur.MUST, 4.0f), Occur.SHOULD);
}
}
private void Combine(BooleanQuery target, BooleanQuery source, Occur occur)
{
if (source.GetClauses().Length == 1)
{
var clause = source.GetClauses().Single();
if (clause.IsProhibited && occur == Occur.SHOULD)
{
source = (BooleanQuery)source.Clone();
source.Add(new MatchAllDocsQuery(), Occur.SHOULD);
target.Add(source, occur);
return;
}
if (clause.Occur == Occur.MUST)
{
clause.Occur = occur;
}
target.Add(clause);
}
else
{
target.Add(source, occur);
}
}
/// <summary>
/// Adds the simple query.
/// </summary>
/// <param name="query">The boolean query.</param>
/// <param name="key">The field key.</param>
/// <param name="value">The field value.</param>
/// <param name="condition">The condition.</param>
/// <param name="isFirst">if set to <c>true</c> [is first].</param>
private void AddIdQuery(LuceneSearch.BooleanQuery query, string key, string value, QueryCondition condition)
{
value = this.GetItemPath(new ID(value));
LuceneSearch.Occur occurrence = this.GetOccur(condition);
query.Add(new LuceneSearch.TermQuery(new Term(key, value)), occurrence);
}
/// <summary>
/// Builds the query.
/// </summary>
/// <param name="query">The result query.</param>
/// <param name="node">The query node.</param>
protected virtual void BuildQuery(LuceneSearch.BooleanQuery query, QueryNode node)
{
Query subQuery = node.Element as Query;
if (subQuery != null && !subQuery.IsEmpty())
{
LuceneSearch.BooleanQuery booleanQuery = new LuceneSearch.BooleanQuery();
if (!string.IsNullOrEmpty(subQuery.SearchRoot))
{
this.AddSearchRoot(booleanQuery, subQuery.SearchRoot);
}
this.BuildQuery(booleanQuery, subQuery.FirstNode);
LuceneSearch.Occur occurance = LuceneSearch.Occur.MUST;
if (node.IsFirst)
{
if (!node.IsLast && (node.NextNode.Element is Condition))
{
occurance = this.GetOccur(((Condition)node.NextNode.Element).QueryCondition);
}
}
else
{
if (!node.IsFirst && (node.PreviousNode.Element is Condition))
{
occurance = this.GetOccur(((Condition)node.PreviousNode.Element).QueryCondition);
}
}
query.Add(booleanQuery, occurance);
}
else if (node.Element is AttributeQuery || node.Element is FieldQuery)
{
QueryCondition condition = QueryCondition.And;
if (node.IsFirst)
{
if (!node.IsLast && (node.NextNode.Element is Condition))
{
condition = ((Condition)node.NextNode.Element).QueryCondition;
}
}
else
{
if (!node.IsFirst && (node.PreviousNode.Element is Condition))
{
condition = ((Condition)node.PreviousNode.Element).QueryCondition;
}
}
this.AddSubQuery(query, node.Element as SubQuery, condition);
}
if (!node.IsLast)
{
this.BuildQuery(query, node.NextNode);
}
this.resultQuery = query;
}
private IndexQuery Boolean(Query query, Occur occur)
{
if (query == null)
{
return this;
}
if (_nativeQuery is MatchAllDocsQuery)
{
_nativeQuery = query;
}
else
{
var newQuery = new BooleanQuery();
newQuery.Add(_nativeQuery, occur);
newQuery.Add(query, occur);
_nativeQuery = newQuery;
}
return this;
}
private void Combine(BooleanQuery target, BooleanQuery source, Occur occur)
{
if (source.GetClauses().Length == 1)
{
var clause = source.GetClauses()[0];
if (clause.Occur == Occur.MUST)
{
clause.Occur = occur;
}
target.Add(clause);
}
else
{
target.Add(source, occur);
}
}
/// <summary>Constructs a BooleanClause.</summary>
public BooleanClause(Query query, Occur occur)
{
this.query = query;
this.occur = occur;
SetFields(occur);
}
private static Query ConstructClauseQuery(Analyzer analyzer, string field, IEnumerable<string> values, Occur occur = Occur.SHOULD, float queryBoost = 1.0f, float termBoost = 1.0f)
{
BooleanQuery query = new BooleanQuery();
foreach (string text in values)
{
Query termQuery = ExecuteAnalyzer(analyzer, field, text);
termQuery.Boost = termBoost;
query.Add(termQuery, occur);
}
query.Boost = queryBoost;
return query;
}
public virtual void SetOccur(Occur occur)
{
this.occur = occur;
SetFields(occur);
}
private static void DescriptionClause(BooleanQuery query, Analyzer analyzer, IEnumerable<string> values, Occur occur)
{
query.Add(ConstructClauseQuery(analyzer, "Description", values), occur);
}
private void SetFields(Occur occur)
{
if (occur == Occur.MUST)
{
required = true;
prohibited = false;
}
else if (occur == Occur.SHOULD)
{
required = false;
prohibited = false;
}
else if (occur == Occur.MUST_NOT)
{
required = false;
prohibited = true;
}
else
{
throw new System.ArgumentException("Unknown operator " + occur);
}
}
private static void AuthorClause(BooleanQuery query, Analyzer analyzer, IEnumerable<string> values, Occur occur)
{
query.Add(ConstructClauseQuery(analyzer, "Authors", values), occur);
}
/// <summary>Constructs a BooleanClause with query <code>q</code>, required
/// <code>r</code> and prohibited <code>p</code>.
/// </summary>
/// <deprecated> use BooleanClause(Query, Occur) instead
/// <ul>
/// <li>For BooleanClause(query, true, false) use BooleanClause(query, BooleanClause.Occur.MUST)
/// <li>For BooleanClause(query, false, false) use BooleanClause(query, BooleanClause.Occur.SHOULD)
/// <li>For BooleanClause(query, false, true) use BooleanClause(query, BooleanClause.Occur.MUST_NOT)
/// </ul>
/// </deprecated>
public BooleanClause(Query q, bool r, bool p)
{
// TODO: remove for Lucene 2.0
query = q;
required = r;
prohibited = p;
if (required)
{
if (prohibited)
{
// prohibited && required doesn't make sense, but we want the old behaviour:
occur = Occur.MUST_NOT;
}
else
{
occur = Occur.MUST;
}
}
else
{
if (prohibited)
{
occur = Occur.MUST_NOT;
}
else
{
occur = Occur.SHOULD;
}
}
}
public ISearchBuilder Forbidden() {
_occur = Occur.MUST_NOT;
return this;
}
private void InitPendingClause() {
_occur = Occur.SHOULD;
_exactMatch = false;
_query = null;
_boost = 0;
_asFilter = false;
_sort = String.Empty;
_comparer = 0;
}
public LuceneQueryPredicateExpression(LuceneQueryFieldExpression field, Expression pattern, Occur occur)
: this(field, pattern, occur, QueryType.Default)
{
}
/**
* Create a new FilterClause
* @param filter A Filter object containing a BitSet
* @param occur A parameter implementation indicating SHOULD, MUST or MUST NOT
*/
public FilterClause(Filter filter, Occur occur)
{
this.occur = occur;
this.filter = filter;
}
/// <summary>Constructs a BooleanClause.</summary>
public BooleanClause(Query query, Occur occur)
{
this.query = query;
this.occur = occur;
}
private static Occur Negate(Occur occur)
{
return (occur == Occur.MUST_NOT)
? Occur.MUST
: Occur.MUST_NOT;
}
/*
* Makes a boolean query based upon a collection of queries and a logical operator.
*
* @param queries the query collection
* @param occur the logical operator
* @return the query
*/
BooleanQuery MakeQuery(Query[] queries, Occur occur)
{
var bq = new BooleanQuery();
foreach (Query query in queries)
{
bq.Add(query, occur);
}
return bq;
}
private void AssertLuceneQueryExpression(Expression expression, string expectedQueryFieldName, ConstantExpression expectedPatternExpression, QueryType expectedQueryType, Occur expectedOccur)
{
Assert.That(expression, Is.InstanceOf<LuceneQueryPredicateExpression>());
var result = (LuceneQueryPredicateExpression)expression;
Assert.That(result.Occur, Is.EqualTo(expectedOccur));
Assert.That(result.QueryType, Is.EqualTo(expectedQueryType));
Assert.That(result.QueryField.FieldName, Is.EqualTo(expectedQueryFieldName));
Assert.That(result.QueryPattern, Is.EqualTo(expectedPatternExpression));
}
