public static ColumnVar createPred(String alias, Var v, URI uri, boolean implied) {
ColumnVar var = createSubj(alias, v, uri);
var.column = "pred";
var.implied = uri != null && implied;
var.types = ValueTypes.URI;
return var;
}
public ColumnVar as(String alias, String column) {
try {
ColumnVar clone = (ColumnVar) super.clone();
clone.alias = alias;
clone.column = column;
clone.nullable = true;
return clone;
} catch (CloneNotSupportedException e) {
throw new AssertionError(e);
}
}
public static ColumnVar createSubj(String alias, Var v, Resource resource) {
ColumnVar var = new ColumnVar();
var.alias = alias;
var.column = "subj";
var.name = v.getName();
var.anonymous = v.isAnonymous();
var.value = resource;
var.types = ValueTypes.RESOURCE;
if (resource instanceof RdbmsURI) {
var.types = ValueTypes.URI;
}
return var;
}
public static ColumnVar createObj(String alias, Var v, Value value) {
ColumnVar var = new ColumnVar();
var.alias = alias;
var.column = "obj";
var.name = v.getName();
var.anonymous = v.isAnonymous();
var.value = value;
var.types = ValueTypes.UNKNOWN;
if (value instanceof RdbmsURI) {
var.types = ValueTypes.URI;
} else if (value instanceof RdbmsResource) {
var.types = ValueTypes.RESOURCE;
}
return var;
}
public static ColumnVar createCtx(String alias, Var v, Resource resource) {
ColumnVar var = new ColumnVar();
var.alias = alias;
var.column = "ctx";
if (v == null) {
var.name = "__ctx" + Integer.toHexString(System.identityHashCode(var));
var.anonymous = true;
var.hidden = true;
} else {
var.name = v.getName();
var.anonymous = v.isAnonymous();
}
var.value = resource;
var.types = ValueTypes.RESOURCE;
if (resource instanceof RdbmsURI) {
var.types = ValueTypes.URI;
}
return var;
}