GH-4923 Spaces inserted by PropertyPathBuilder cause problems with AllegroGraph

- Removed spaces after prefix operators and before postfix operators

Author: reckart

core/sparqlbuilder/src/main/java/org/eclipse/rdf4j/sparqlbuilder/constraint/propertypath/InversePath.java

@@ -22,7 +22,8 @@ public InversePath(PropertyPath path) {
 		this.path = path;
 	}
 
+	@Override
 	public String getQueryString() {
-		return "^ " + path.getQueryString();
+		return "^" + path.getQueryString();
 	}
 }

core/sparqlbuilder/src/main/java/org/eclipse/rdf4j/sparqlbuilder/constraint/propertypath/InversePredicatePath.java

@@ -33,6 +33,6 @@ public InversePredicatePath(IRI predicate) {
 
 	@Override
 	public String getQueryString() {
-		return "^ " + predicate.getQueryString();
+		return "^" + predicate.getQueryString();
 	}
 }

core/sparqlbuilder/src/main/java/org/eclipse/rdf4j/sparqlbuilder/constraint/propertypath/NegatedPropertySet.java

@@ -30,12 +30,12 @@ public NegatedPropertySet(PredicatePathOrInversePredicatePath... properties) {
 	@Override
 	public String getQueryString() {
 		if (properties.length == 1) {
-			return "! " + properties[0].getQueryString();
+			return "!" + properties[0].getQueryString();
 		} else {
 			return Arrays
 					.stream(properties)
 					.map(QueryElement::getQueryString)
-					.collect(Collectors.joining(" | ", "! ( ", " )"));
+					.collect(Collectors.joining(" | ", "!( ", " )"));
 		}
 	}
 }

core/sparqlbuilder/src/main/java/org/eclipse/rdf4j/sparqlbuilder/constraint/propertypath/OneOrMorePath.java

@@ -24,6 +24,6 @@ public OneOrMorePath(PropertyPath path) {
 
 	@Override
 	public String getQueryString() {
-		return path.getQueryString() + " +";
+		return path.getQueryString() + "+";
 	}
 }

core/sparqlbuilder/src/main/java/org/eclipse/rdf4j/sparqlbuilder/constraint/propertypath/ZeroOrMorePath.java

@@ -24,6 +24,6 @@ public ZeroOrMorePath(PropertyPath path) {
 
 	@Override
 	public String getQueryString() {
-		return path.getQueryString() + " *";
+		return path.getQueryString() + "*";
 	}
 }

core/sparqlbuilder/src/main/java/org/eclipse/rdf4j/sparqlbuilder/constraint/propertypath/ZeroOrOnePath.java

@@ -24,6 +24,6 @@ public ZeroOrOnePath(PropertyPath path) {
 
 	@Override
 	public String getQueryString() {
-		return path.getQueryString() + " ?";
+		return path.getQueryString() + "?";
 	}
 }