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ARQ is a SPARQL 1.1 query engine for Apache Jena
/*
* 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.jena.sparql.sse.builders;
import java.util.HashMap ;
import java.util.Map ;
import org.apache.jena.graph.Node ;
import org.apache.jena.sparql.ARQInternalErrorException ;
import org.apache.jena.sparql.algebra.Op ;
import org.apache.jena.sparql.core.Var ;
import org.apache.jena.sparql.core.VarExprList ;
import org.apache.jena.sparql.expr.* ;
import org.apache.jena.sparql.expr.aggregate.Aggregator ;
import org.apache.jena.sparql.expr.aggregate.AggregatorFactory ;
import org.apache.jena.sparql.sse.Item ;
import org.apache.jena.sparql.sse.ItemList ;
import org.apache.jena.sparql.sse.Tags ;
import org.apache.jena.sparql.util.NodeUtils ;
public class BuilderExpr
{
// Build an expr list when they may also be a single expression.
// Because expressions are themselves lists, this requires ExprLists to be explicitly tagged
// (exprlist ...)
// ((expr1) (expr2))
// (expr))
public static ExprList buildExprOrExprList(Item item)
{
if ( item.isTagged(Tags.tagExprList) )
return buildExprList(item) ;
if ( listOfLists(item) )
return buildExprListUntagged(item.getList(), 0) ;
Expr expr = buildExpr(item) ;
ExprList exprList = new ExprList(expr) ;
return exprList ;
}
private static boolean listOfLists(Item item)
{
// Atom
if ( ! item.isList() ) return false ;
// List of atom (inc tagged)
if ( ! item.getList().car().isList() ) return false ;
// List of lists
return true ;
}
public static ExprList buildExprList(Item item)
{
if ( ! item.isTagged(Tags.tagExprList) )
BuilderLib.broken(item, "Not tagged exprlist") ;
ItemList list = item.getList() ;
return buildExprListUntagged(list, 1) ;
}
private static ExprList buildExprListUntagged(Item item)
{
return buildExprListUntagged(item.getList(), 0) ;
}
private static ExprList buildExprListUntagged(ItemList list, int idx)
{
ExprList exprList = new ExprList() ;
for ( int i = idx ; i < list.size() ; i++ )
{
Item item = list.get(i) ;
exprList.add(buildExpr(item)) ;
}
return exprList ;
}
public static Expr buildExpr(Item item)
{
// If this (bob) is stateless, we can have one and use always.
BuilderExpr bob = new BuilderExpr() ;
return bob.buildItem(item) ;
}
public static VarExprList buildNamedExprOrExprList(Item item)
{
if ( ! item.isList() )
BuilderLib.broken(item, "Not a var expr list") ;
ItemList list = item.getList() ;
if ( list.isEmpty() )
return new VarExprList() ;
if ( list.car().isList() )
// List of lists
return buildNamedExprList(list) ;
// One item
return buildNamedExpr(item) ;
}
public static VarExprList buildNamedExprList(ItemList list)
{
VarExprList x = new VarExprList() ;
for ( Item item : list )
buildNamedExpr(item, x) ;
return x ;
}
public static VarExprList buildNamedExpr(Item item)
{
VarExprList varExprList = new VarExprList() ;
buildNamedExpr(item, varExprList) ;
return varExprList ;
}
private static void buildNamedExpr(Item item, VarExprList varExprList)
{
if ( item.isNode() )
{
Var v = BuilderNode.buildVar(item) ;
varExprList.add(v) ;
return ;
}
if ( !item.isList() || item.getList().size() != 2 )
BuilderLib.broken(item, "Not a var or var/expression pair") ;
ItemList list = item.getList() ;
if ( list.size() == 1 )
{
Var v = BuilderNode.buildVar(list.car()) ;
varExprList.add(v) ;
return ;
}
if ( list.size() != 2 )
BuilderLib.broken(list, "Not a var or var/expression pair") ;
Var var = BuilderNode.buildVar(list.get(0)) ;
Expr expr = BuilderExpr.buildExpr(list.get(1)) ;
varExprList.add(var, expr) ;
}
protected Map dispatch = new HashMap<>() ;
public Expr buildItem(Item item)
{
Expr expr = null ;
if ( item.isList() )
{
ItemList list = item.getList() ;
if ( list.size() == 0 )
BuilderLib.broken(item, "Empty list for expression") ;
Item head = list.get(0) ;
if ( head.isNode() )
{
if ( head.getNode().isVariable() && list.size() == 1 )
{
// The case of (?z)
return new ExprVar(Var.alloc(head.getNode())) ;
}
return buildFunctionCall(list) ;
}
else if ( head.isList() )
BuilderLib.broken(item, "Head is a list") ;
else if ( head.isSymbol() )
{
if ( item.isTagged(Tags.tagExpr) )
{
BuilderLib.checkLength(2, list, "Wrong length: "+item.shortString()) ;
item = list.get(1) ;
return buildItem(item) ;
}
return buildKnownFunction(list) ;
}
throw new ARQInternalErrorException() ;
}
if ( item.isNode() )
{
if ( Var.isVar(item.getNode()) )
return new ExprVar(Var.alloc(item.getNode())) ;
return NodeValue.makeNode(item.getNode()) ;
}
if ( item.isSymbolIgnoreCase(Tags.tagTrue) )
return NodeValue.TRUE ;
if ( item.isSymbolIgnoreCase(Tags.tagFalse) )
return NodeValue.FALSE ;
BuilderLib.broken(item, "Not a list or a node or recognized symbol: "+item) ;
return null ;
}
public BuilderExpr()
{
dispatch.put(Tags.tagRegex, buildRegex) ;
dispatch.put(Tags.symEQ, buildEQ) ;
dispatch.put(Tags.tagEQ, buildEQ) ;
dispatch.put(Tags.symNE, buildNE) ;
dispatch.put(Tags.tagNE, buildNE) ;
dispatch.put(Tags.symGT, buildGT) ;
dispatch.put(Tags.tagGT, buildGT) ;
dispatch.put(Tags.symLT, buildLT) ;
dispatch.put(Tags.tagLT, buildLT) ;
dispatch.put(Tags.symLE, buildLE) ;
dispatch.put(Tags.tagLE, buildLE) ;
dispatch.put(Tags.symGE, buildGE) ;
dispatch.put(Tags.tagGE, buildGE) ;
dispatch.put(Tags.symOr, buildOr) ; // Same builders for (or ..) and (|| ..)
dispatch.put(Tags.tagOr, buildOr) ;
dispatch.put(Tags.symAnd, buildAnd) ; // Same builders for (and ..) and (&& ..)
dispatch.put(Tags.tagAnd, buildAnd) ;
dispatch.put(Tags.symPlus, buildPlus) ;
dispatch.put(Tags.tagAdd, buildPlus) ;
dispatch.put(Tags.symMinus, buildMinus) ;
dispatch.put(Tags.tagSubtract, buildMinus) ; // Not to be confused with Op for SPARQL MINUS
dispatch.put(Tags.tagMinus, buildMinus) ;
dispatch.put(Tags.tagUnaryPlus, buildUnaryPlus) ;
dispatch.put(Tags.tagUnaryMinus, buildUnaryMinus) ;
dispatch.put(Tags.symMult, buildMult) ;
dispatch.put(Tags.tagMultiply, buildMult) ;
dispatch.put(Tags.symDiv, buildDiv) ;
dispatch.put(Tags.tagDivide, buildDiv) ;
dispatch.put(Tags.tagNot, buildNot) ; // Same builders for (not ..) and (! ..)
dispatch.put(Tags.symNot, buildNot) ;
dispatch.put(Tags.tagStr, buildStr) ;
dispatch.put(Tags.tagStrLang, buildStrLang) ;
dispatch.put(Tags.tagStrDatatype, buildStrDatatype) ;
dispatch.put(Tags.tagStr, buildStr) ;
dispatch.put(Tags.tagRand, buildRand) ;
dispatch.put(Tags.tagYear, buildYear) ;
dispatch.put(Tags.tagMonth, buildMonth) ;
dispatch.put(Tags.tagDay, buildDay) ;
dispatch.put(Tags.tagHours, buildHours) ;
dispatch.put(Tags.tagMinutes, buildMinutes) ;
dispatch.put(Tags.tagSeconds, buildSeconds) ;
dispatch.put(Tags.tagTimezone, buildTimezone) ;
dispatch.put(Tags.tagTZ, buildTZ) ;
dispatch.put(Tags.tagNow, buildNow) ;
dispatch.put(Tags.tagUUID, buildUUID) ;
dispatch.put(Tags.tagStrUUID, buildStrUUID) ;
dispatch.put(Tags.tagVersion, buildVersion) ;
dispatch.put(Tags.tagMD5, buildMD5) ;
dispatch.put(Tags.tagSHA1, buildSHA1) ;
dispatch.put(Tags.tagSHA224, buildSHA224) ;
dispatch.put(Tags.tagSHA256, buildSHA256) ;
dispatch.put(Tags.tagSHA384, buildSHA384) ;
dispatch.put(Tags.tagSHA512, buildSHA512) ;
dispatch.put(Tags.tagStrlen, buildStrlen) ;
dispatch.put(Tags.tagSubstr, buildSubstr) ;
dispatch.put(Tags.tagReplace, buildStrReplace) ;
dispatch.put(Tags.tagStrUppercase, buildStrUppercase) ;
dispatch.put(Tags.tagStrLowercase, buildStrLowercase) ;
dispatch.put(Tags.tagStrEnds, buildStrEnds) ;
dispatch.put(Tags.tagStrStarts, buildStrStarts) ;
dispatch.put(Tags.tagStrBefore, buildStrBefore) ;
dispatch.put(Tags.tagStrAfter, buildStrAfter) ;
dispatch.put(Tags.tagStrContains, buildStrContains) ;
dispatch.put(Tags.tagStrEncodeForURI, buildStrEncode) ;
dispatch.put(Tags.tagConcat, buildConcat) ;
dispatch.put(Tags.tagNumAbs, buildNumAbs) ;
dispatch.put(Tags.tagNumRound, buildNumRound) ;
dispatch.put(Tags.tagNumCeiling, buildNumCeiling) ;
dispatch.put(Tags.tagNumFloor, buildNumFloor) ;
dispatch.put(Tags.tagIsNumeric, buildIsNumeric) ;
dispatch.put(Tags.tagLang, buildLang) ;
dispatch.put(Tags.tagLangMatches, buildLangMatches) ;
dispatch.put(Tags.tagSameTerm, buildSameTerm) ;
dispatch.put(Tags.tagDatatype, buildDatatype) ;
dispatch.put(Tags.tagBound, buildBound) ;
dispatch.put(Tags.tagCoalesce, buildCoalesce) ;
dispatch.put(Tags.tagConcat, buildConcat) ;
dispatch.put(Tags.tagIf, buildConditional) ;
dispatch.put(Tags.tagIsIRI, buildIsIRI) ;
dispatch.put(Tags.tagIsURI, buildIsURI) ;
dispatch.put(Tags.tagIsBlank, buildIsBlank) ;
dispatch.put(Tags.tagIsLiteral, buildIsLiteral) ;
dispatch.put(Tags.tagExists, buildExists) ;
dispatch.put(Tags.tagNotExists, buildNotExists) ;
dispatch.put(Tags.tagBNode, buildBNode) ;
dispatch.put(Tags.tagIri, buildIri) ;
dispatch.put(Tags.tagUri, buildUri) ;
dispatch.put(Tags.tagIn, buildIn) ;
dispatch.put(Tags.tagNotIn, buildNotIn) ;
dispatch.put(Tags.tagCall, buildCall) ;
dispatch.put(Tags.tagCount, buildCount) ;
dispatch.put(Tags.tagSum, buildSum) ;
dispatch.put(Tags.tagMin, buildMin) ;
dispatch.put(Tags.tagMax, buildMax) ;
dispatch.put(Tags.tagAvg, buildAvg) ;
dispatch.put(Tags.tagSample, buildSample) ;
dispatch.put(Tags.tagGroupConcat, buildGroupConcat) ;
dispatch.put(Tags.tagAgg, buildCustomAggregate) ;
}
// See exprbuilder.rb
static public interface Build { Expr make(ItemList list) ; }
protected Build findBuild(String str)
{
for ( String key : dispatch.keySet() )
{
if ( str.equalsIgnoreCase( key ) ) // ???
{
return dispatch.get( key );
}
}
return null ;
}
protected Expr buildKnownFunction(ItemList list)
{
if ( list.size() == 0 )
BuilderLib.broken(list, "Empty list for expression") ;
Item item = list.get(0) ;
String tag = item.getSymbol() ;
if ( tag == null )
BuilderLib.broken(item, "Null tag") ;
Build b = findBuild(tag) ;
if ( b == null )
BuilderLib.broken(item, "No known symbol for "+tag) ;
return b.make(list) ;
}
protected static Expr buildFunctionCall(ItemList list)
{
Item head = list.get(0) ;
Node node = head.getNode() ;
if ( node.isBlank() )
BuilderLib.broken(head, "Blank node for function call!") ;
if ( node.isLiteral() )
BuilderLib.broken(head, "Literal node for function call!") ;
ExprList args = buildExprListUntagged(list, 1) ;
// Args
return new E_Function(node.getURI(), args) ;
}
// ---- Dispatch objects
// Can assume the tag is right (i.e. dispatched correctly)
// Specials
final protected Build buildRegex = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, 4, list, "Regex: wanted 2 or 3 arguments") ;
Expr expr = buildExpr(list.get(1)) ;
Expr pattern = buildExpr(list.get(2)) ;
Expr flags = null ;
if ( list.size() != 3 )
flags = buildExpr(list.get(3)) ;
return new E_Regex(expr, pattern, flags) ;
}
};
// Special
final protected Build buildPlus = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, 3, list, "+: wanted 1 or 2 arguments") ;
if ( list.size() == 2 )
{
Expr ex = buildExpr(list.get(1)) ;
return new E_UnaryPlus(ex) ;
}
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_Add(left, right) ;
}
};
final protected Build buildUnaryPlus = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "unaryplus: wanted 1 argument") ;
Expr ex = buildExpr(list.get(1)) ;
return new E_UnaryPlus(ex) ;
}
};
final protected Build buildMinus = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, 3, list, "-: wanted 1 or 2 arguments") ;
if ( list.size() == 2 )
{
Expr ex = buildExpr(list.get(1)) ;
return new E_UnaryMinus(ex) ;
}
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_Subtract(left, right) ;
}
};
final protected Build buildUnaryMinus = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "unaryminus: wanted 1 argument") ;
Expr ex = buildExpr(list.get(1)) ;
return new E_UnaryMinus(ex) ;
}
};
private static int numArgs(ItemList list) { return list.size()-1 ; }
final protected Build buildEQ = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "=: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_Equals(left, right) ;
}
};
final protected Build buildNE = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "!=: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_NotEquals(left, right) ;
}
};
final protected Build buildGT = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, ">: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_GreaterThan(left, right) ;
}
};
final protected Build buildLT = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "<: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_LessThan(left, right) ;
}
};
final protected Build buildLE = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "<=: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_LessThanOrEqual(left, right) ;
}
};
final protected Build buildGE = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, ">=: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_GreaterThanOrEqual(left, right) ;
}
};
final protected Build buildOr = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "||: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_LogicalOr(left, right) ;
}
};
final protected Build buildAnd = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "&&: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_LogicalAnd(left, right) ;
}
};
final protected Build buildMult = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "*: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_Multiply(left, right) ;
}
};
final protected Build buildDiv = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "/: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_Divide(left, right) ;
}
};
final protected Build buildNot = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "!: wanted 1 arguments: got :"+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_LogicalNot(ex) ;
}
};
final protected Build buildStr = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "str: wanted 1 arguments: got :"+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_Str(ex) ;
}
};
final protected Build buildStrLang = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "strlang: wanted 2 arguments: got :"+numArgs(list)) ;
Expr ex1 = buildExpr(list.get(1)) ;
Expr ex2 = buildExpr(list.get(2)) ;
return new E_StrLang(ex1, ex2) ;
}
};
final protected Build buildStrDatatype = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "strlang: wanted 2 arguments: got :"+numArgs(list)) ;
Expr ex1 = buildExpr(list.get(1)) ;
Expr ex2 = buildExpr(list.get(2)) ;
return new E_StrDatatype(ex1, ex2) ;
}
};
final protected Build buildRand = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(1, list, "rand: wanted 0 arguments: got: "+numArgs(list)) ;
return new E_Random() ;
}
};
final protected Build buildYear = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "year: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_DateTimeYear(ex) ;
}
} ;
final protected Build buildMonth = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "month: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_DateTimeMonth(ex) ;
}
} ;
final protected Build buildDay = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "day: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_DateTimeDay(ex) ;
}
} ;
final protected Build buildHours = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "hours: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_DateTimeHours(ex) ;
}
} ;
final protected Build buildMinutes = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "minutes: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_DateTimeMinutes(ex) ;
}
} ;
final protected Build buildSeconds = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "seconds: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_DateTimeSeconds(ex) ;
}
} ;
final protected Build buildTimezone = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "timezone: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_DateTimeTimezone(ex) ;
}
} ;
final protected Build buildTZ = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "TZ: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_DateTimeTZ(ex) ;
}
} ;
final protected Build buildNow = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(1, list, "now: wanted 0 arguments: got: "+numArgs(list)) ;
return new E_Now() ;
}
} ;
final protected Build buildUUID = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(1, list, "uuid: wanted 0 arguments: got: "+numArgs(list)) ;
return new E_UUID() ;
}
} ;
final protected Build buildStrUUID = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(1, list, "struuid: wanted 0 arguments: got: "+numArgs(list)) ;
return new E_StrUUID() ;
}
} ;
final protected Build buildVersion = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(1, list, "version: wanted 0 arguments: got: "+numArgs(list)) ;
return new E_Version() ;
}
} ;
final protected Build buildMD5 = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "md5: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_MD5(ex) ;
}
} ;
final protected Build buildSHA1 = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "md5: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_SHA1(ex) ;
}
} ;
final protected Build buildSHA224 = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "md5: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_SHA224(ex) ;
}
} ;
final protected Build buildSHA256 = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "md5: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_SHA256(ex) ;
}
} ;
final protected Build buildSHA384 = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "md5: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_SHA384(ex) ;
}
} ;
final protected Build buildSHA512 = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "md5: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_SHA512(ex) ;
}
} ;
final protected Build buildStrlen = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "strlen: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_StrLength(ex) ;
}
} ;
final protected Build buildSubstr = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3,4, list, "substr: wanted 2 or 3 arguments: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
Expr x = buildExpr(list.get(2)) ;
Expr y = null ;
if ( list.size() == 4 )
y = buildExpr(list.get(3)) ;
return new E_StrSubstring(ex, x, y) ;
}
} ;
final protected Build buildStrReplace = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(4, 5, list, "replace: wanted 3 or 4 arguments: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
Expr x = buildExpr(list.get(2)) ;
Expr y = buildExpr(list.get(3)) ;
Expr z = null ;
if ( list.size() == 5 )
z = buildExpr(list.get(4)) ;
return new E_StrReplace(ex, x, y, z) ;
}
} ;
final protected Build buildStrUppercase = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "ucase: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_StrUpperCase(ex) ;
}
} ;
final protected Build buildStrLowercase = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "lcase: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_StrLowerCase(ex) ;
}
} ;
final protected Build buildStrEnds = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "strends: wanted 2 arguments: got: "+numArgs(list)) ;
Expr ex1 = buildExpr(list.get(1)) ;
Expr ex2 = buildExpr(list.get(2)) ;
return new E_StrEndsWith(ex1, ex2) ;
}
} ;
final protected Build buildStrStarts = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "strstarts: wanted 2 arguments: got: "+numArgs(list)) ;
Expr ex1 = buildExpr(list.get(1)) ;
Expr ex2 = buildExpr(list.get(2)) ;
return new E_StrStartsWith(ex1, ex2) ;
}
} ;
final protected Build buildStrBefore = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "strbefore: wanted 2 arguments: got: "+numArgs(list)) ;
Expr ex1 = buildExpr(list.get(1)) ;
Expr ex2 = buildExpr(list.get(2)) ;
return new E_StrBefore(ex1, ex2) ;
}
} ;
final protected Build buildStrAfter = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "strafter: wanted 2 arguments: got: "+numArgs(list)) ;
Expr ex1 = buildExpr(list.get(1)) ;
Expr ex2 = buildExpr(list.get(2)) ;
return new E_StrAfter(ex1, ex2) ;
}
} ;
final protected Build buildStrContains = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "contains: wanted 2 arguments: got: "+numArgs(list)) ;
Expr ex1 = buildExpr(list.get(1)) ;
Expr ex2 = buildExpr(list.get(2)) ;
return new E_StrContains(ex1, ex2) ;
}
} ;
final protected Build buildStrEncode = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "encode: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_StrEncodeForURI(ex) ;
}
} ;
final protected Build buildNumAbs = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "abs: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_NumAbs(ex) ;
}
} ;
final protected Build buildNumRound = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "round: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_NumRound(ex) ;
}
} ;
final protected Build buildNumCeiling = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "ceiling: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_NumCeiling(ex) ;
}
} ;
final protected Build buildNumFloor = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "floor: wanted 1 argument: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_NumFloor(ex) ; }
} ;
final protected Build buildLang = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "lang: wanted 1 arguments: got :"+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_Lang(ex) ;
}
};
final protected Build buildLangMatches = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "langmatches: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_LangMatches(left, right) ;
}
};
final protected Build buildSameTerm = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(3, list, "sameterm: wanted 2 arguments: got :"+numArgs(list)) ;
Expr left = buildExpr(list.get(1)) ;
Expr right = buildExpr(list.get(2)) ;
return new E_SameTerm(left, right) ;
}
};
final protected Build buildDatatype = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "datatype: wanted 1 arguments: got :"+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_Datatype(ex) ;
}
};
final protected Build buildBound = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "bound: wanted 1 arguments: got :"+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_Bound(ex) ;
}
};
final protected Build buildCoalesce = new Build()
{
@Override
public Expr make(ItemList list)
{
ExprList exprs = buildExprListUntagged(list, 1) ;
return new E_Coalesce(exprs) ;
}
};
final protected Build buildConcat = new Build()
{
@Override
public Expr make(ItemList list)
{
ExprList exprs = buildExprListUntagged(list, 1) ;
return new E_StrConcat(exprs) ;
}
};
final protected Build buildConditional = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(4, list, "IF: wanted 3 arguments: got :"+numArgs(list)) ;
Expr ex1 = buildExpr(list.get(1)) ;
Expr ex2 = buildExpr(list.get(2)) ;
Expr ex3 = buildExpr(list.get(3)) ;
return new E_Conditional(ex1, ex2, ex3) ;
}
};
final protected Build buildIsIRI = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "isIRI: wanted 1 arguments: got :"+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_IsIRI(ex) ;
}
};
final protected Build buildIsURI = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "isURI: wanted 1 arguments: got :"+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_IsURI(ex) ;
}
};
final protected Build buildIsBlank = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "isBlank: wanted 1 arguments: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_IsBlank(ex) ;
}
};
final protected Build buildIsLiteral = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "isLiteral: wanted 1 arguments: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_IsLiteral(ex) ;
}
};
final protected Build buildIsNumeric = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "isNumeric: wanted 1 arguments: got: "+numArgs(list)) ;
Expr ex = buildExpr(list.get(1)) ;
return new E_IsNumeric(ex) ;
}
};
final protected Build buildExists = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "exists: wanted 1 arguments: got: "+numArgs(list)) ;
Op op = BuilderOp.build(list.get(1)) ;
return new E_Exists(op) ;
}
};
final protected Build buildNotExists = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "notexists: wanted 1 arguments: got: "+numArgs(list)) ;
Op op = BuilderOp.build(list.get(1)) ;
return new E_NotExists(op) ;
}
};
final protected Build buildBNode = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(1, 2, list, "bnode: wanted 0 or 1 arguments: got: "+numArgs(list)) ;
if ( list.size() == 1 )
return new E_BNode() ;
Expr expr = buildExpr(list.get(1)) ;
return new E_BNode(expr) ;
}
};
final protected Build buildIri = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "iri: wanted 1 argument: got: "+numArgs(list)) ;
Expr expr = buildExpr(list.get(1)) ;
return new E_IRI(expr) ;
}
};
final protected Build buildUri = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(2, list, "uri: wanted 1 argument: got: "+numArgs(list)) ;
Expr expr = buildExpr(list.get(1)) ;
return new E_URI(expr) ;
}
};
final protected Build buildIn = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLengthAtLeast(1, list, "in: wanted 1 or more arguments: got: "+numArgs(list)) ;
Item lhs = list.car() ;
Expr expr = buildExpr(list.get(1)) ;
ExprList eList = buildExprListUntagged(list, 2) ;
return new E_OneOf(expr, eList) ;
}
};
final protected Build buildNotIn = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLengthAtLeast(1, list, "notin: wanted 1 or more arguments: got: "+numArgs(list)) ;
Item lhs = list.car() ;
Expr expr = buildExpr(list.get(1)) ;
ExprList eList = buildExprListUntagged(list, 2) ;
return new E_NotOneOf(expr, eList) ;
}
};
final protected Build buildCall = new Build()
{
@Override
public Expr make(ItemList list)
{
ExprList args = buildExprListUntagged(list, 1) ;
// Args
return new E_Call(args) ;
}
};
// ---- Aggregate functions
// (count)
// (count distinct)
// (count ?var)
// (count distinct ?var)
// Need a canonical name for the variable that will be set by the aggregation.
// Aggregator.getVarName.
static boolean startsWithDistinct(ItemList x)
{
if ( x.size() > 0 && x.car().isSymbol(Tags.tagDistinct) )
return true ;
return false ;
}
// All the one expression cases
static abstract class BuildAggCommon implements Build
{
@Override
public final Expr make(ItemList list)
{
ItemList x = list.cdr(); // drop "sum"
boolean distinct = startsWithDistinct(x) ;
if ( distinct )
x = x.cdr();
BuilderLib.checkLength(1, x, "Broken syntax: "+list.shortString()) ;
// (sum ?var)
Expr expr = buildExpr(x.get(0)) ;
return make(distinct, expr) ;
}
public abstract Expr make(boolean distinct, Expr expr) ;
}
final protected Build buildCount = new Build()
{
@Override
public Expr make(final ItemList list)
{
ItemList x = list.cdr(); // drop "count"
boolean distinct = startsWithDistinct(x) ;
if ( distinct )
x = x.cdr();
BuilderLib.checkLength(0, 1, x, "Broken syntax: "+list.shortString()) ;
Aggregator agg = null ;
if ( x.size() == 0 )
agg = AggregatorFactory.createCount(distinct) ;
else
{
Expr expr = BuilderExpr.buildExpr(x.get(0)) ;
agg = AggregatorFactory.createCountExpr(distinct, expr) ;
}
return new ExprAggregator(null, agg) ;
}
};
final protected Build buildSum = new BuildAggCommon()
{
@Override
public Expr make(boolean distinct, Expr expr)
{
Aggregator agg = AggregatorFactory.createSum(distinct, expr) ;
return new ExprAggregator(null, agg) ;
}
};
final protected Build buildMin = new BuildAggCommon()
{
@Override
public Expr make(boolean distinct, Expr expr)
{
Aggregator agg = AggregatorFactory.createMin(distinct, expr) ;
return new ExprAggregator(null, agg) ;
}
};
final protected Build buildMax = new BuildAggCommon()
{
@Override
public Expr make(boolean distinct, Expr expr)
{
Aggregator agg = AggregatorFactory.createMax(distinct, expr) ;
return new ExprAggregator(null, agg) ;
}
};
final protected Build buildAvg = new BuildAggCommon()
{
@Override
public Expr make(boolean distinct, Expr expr)
{
Aggregator agg = AggregatorFactory.createAvg(distinct, expr) ;
return new ExprAggregator(null, agg) ;
}
};
final protected Build buildSample = new BuildAggCommon()
{
@Override
public Expr make(boolean distinct, Expr expr)
{
Aggregator agg = AggregatorFactory.createSample(distinct, expr) ;
return new ExprAggregator(null, agg) ;
}
};
final protected Build buildGroupConcat = new Build()
{
@Override
public Expr make(final ItemList list)
{
ItemList x = list.cdr(); // drop "group_concat"
boolean distinct = startsWithDistinct(x) ;
if ( distinct )
x = x.cdr();
// Complex syntax:
// (groupConcat (separator "string) expr )
if ( x.size() == 0 )
BuilderLib.broken(list, "Broken syntax: "+list.shortString()) ;
String separator = null ;
if ( x.get(0).isTagged(Tags.tagSeparator))
{
// What about ORDERED BY
ItemList y = x.get(0).getList() ;
BuilderLib.checkLength(2, y, "Broken syntax: "+list) ;
Node n = y.get(1).getNode() ;
if ( ! NodeUtils.isSimpleString(n) )
BuilderLib.broken(y, "Need string for separator: "+y) ;
separator = n.getLiteralLexicalForm() ;
x = x.cdr();
}
Expr expr = buildExpr(x.get(0)) ;
Aggregator agg = AggregatorFactory.createGroupConcat(distinct, expr, separator, null) ;
return new ExprAggregator(null, agg) ;
}
};
final protected Build buildCustomAggregate = new Build() {
@Override
public Expr make(final ItemList list)
{
ItemList x = list.cdr(); // drop "agg"
if ( x.size() == 0 )
BuilderLib.broken(list, "Missing IRI for aggregate") ;
Item z = x.car() ;
if ( ! z.isNodeURI() )
BuilderLib.broken(list, "Not an IRI for aggregate: "+z) ;
x = x.cdr() ;
boolean distinct = startsWithDistinct(x) ;
if ( distinct )
x = x.cdr();
ExprList e = buildExprListUntagged(x, 0) ;
Aggregator agg = AggregatorFactory.createCustom(z.getNode().getURI(), distinct, e) ;
return new ExprAggregator(null, agg) ;
}
} ;
final protected Build buildAggNull = new Build()
{
@Override
public Expr make(ItemList list)
{
BuilderLib.checkLength(1, list, "Broken syntax: "+list.shortString()) ;
return new ExprAggregator(null, AggregatorFactory.createAggNull()) ;
}
};
}
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