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本文整理了Java中org.eclipse.rdf4j.query.algebra.ZeroLengthPath.getObjectVar()
方法的一些代码示例,展示了ZeroLengthPath.getObjectVar()
的具体用法。这些代码示例主要来源于Github
/Stackoverflow
/Maven
等平台,是从一些精选项目中提取出来的代码,具有较强的参考意义,能在一定程度帮忙到你。ZeroLengthPath.getObjectVar()
方法的具体详情如下:
包路径:org.eclipse.rdf4j.query.algebra.ZeroLengthPath
类名称:ZeroLengthPath
方法名:getObjectVar
暂无
代码示例来源:origin: de.tudarmstadt.ukp.inception.rdf4j/rdf4j-queryalgebra-evaluation
public CloseableIteration<BindingSet, QueryEvaluationException> evaluate(ZeroLengthPath zlp,
final BindingSet bindings)
throws QueryEvaluationException
{
final Var subjectVar = zlp.getSubjectVar();
final Var objVar = zlp.getObjectVar();
final Var contextVar = zlp.getContextVar();
Value subj = null;
try {
subj = evaluate(subjectVar, bindings);
}
catch (QueryEvaluationException e) {
}
Value obj = null;
try {
obj = evaluate(objVar, bindings);
}
catch (QueryEvaluationException e) {
}
if (subj != null && obj != null) {
if (!subj.equals(obj)) {
return new EmptyIteration<BindingSet, QueryEvaluationException>();
}
}
return getZeroLengthPathIterator(bindings, subjectVar, objVar, contextVar, subj, obj);
}
代码示例来源:origin: org.eclipse.rdf4j/rdf4j-queryalgebra-evaluation
public CloseableIteration<BindingSet, QueryEvaluationException> evaluate(ZeroLengthPath zlp,
final BindingSet bindings)
throws QueryEvaluationException
{
final Var subjectVar = zlp.getSubjectVar();
final Var objVar = zlp.getObjectVar();
final Var contextVar = zlp.getContextVar();
Value subj = null;
try {
subj = evaluate(subjectVar, bindings);
}
catch (QueryEvaluationException e) {
}
Value obj = null;
try {
obj = evaluate(objVar, bindings);
}
catch (QueryEvaluationException e) {
}
if (subj != null && obj != null) {
if (!subj.equals(obj)) {
return new EmptyIteration<BindingSet, QueryEvaluationException>();
}
}
return getZeroLengthPathIterator(bindings, subjectVar, objVar, contextVar, subj, obj);
}
代码示例来源:origin: eclipse/rdf4j
@Override
public boolean equals(Object other) {
if (other instanceof ZeroLengthPath) {
ZeroLengthPath o = (ZeroLengthPath)other;
return subjectVar.equals(o.getSubjectVar()) && objectVar.equals(o.getObjectVar())
&& nullEquals(contextVar, o.getContextVar()) && scope.equals(o.getScope());
}
return false;
}
代码示例来源:origin: org.eclipse.rdf4j/rdf4j-client
@Override
public boolean equals(Object other) {
if (other instanceof ZeroLengthPath) {
ZeroLengthPath o = (ZeroLengthPath)other;
return subjectVar.equals(o.getSubjectVar()) && objectVar.equals(o.getObjectVar())
&& nullEquals(contextVar, o.getContextVar()) && scope.equals(o.getScope());
}
return false;
}
代码示例来源:origin: de.tudarmstadt.ukp.inception.rdf4j/rdf4j-queryalgebra-evaluation
@Override
public void meet(ZeroLengthPath node) {
Var subjVar = node.getSubjectVar();
Var objVar = node.getObjectVar();
if ((subjVar != null && subjVar.hasValue()) || (objVar != null && objVar.hasValue())) {
// subj = obj
cardinality = 1.0;
}
else {
// actual cardinality = count(union(subjs, objs))
// but cost is equivalent to ?s ?p ?o ?c (impl scans all statements)
// so due to the lower actual cardinality we value it in preference to a fully unbound statement pattern.
cardinality = getSubjectCardinality(subjVar) * getObjectCardinality(objVar)
* getContextCardinality(node.getContextVar());
}
}
代码示例来源:origin: org.eclipse.rdf4j/rdf4j-queryalgebra-evaluation
@Override
public void meet(ZeroLengthPath node) {
Var subjVar = node.getSubjectVar();
Var objVar = node.getObjectVar();
if ((subjVar != null && subjVar.hasValue()) || (objVar != null && objVar.hasValue())) {
// subj = obj
cardinality = 1.0;
}
else {
// actual cardinality = count(union(subjs, objs))
// but cost is equivalent to ?s ?p ?o ?c (impl scans all statements)
// so due to the lower actual cardinality we value it in preference to a fully unbound statement pattern.
cardinality = getSubjectCardinality(subjVar) * getObjectCardinality(objVar)
* getContextCardinality(node.getContextVar());
}
}
代码示例来源:origin: org.eclipse.rdf4j/rdf4j-client
@Override
public ZeroLengthPath clone() {
ZeroLengthPath clone = (ZeroLengthPath)super.clone();
clone.setSubjectVar(getSubjectVar().clone());
clone.setObjectVar(getObjectVar().clone());
if (getContextVar() != null) {
clone.setContextVar(getContextVar().clone());
}
return clone;
}
}
代码示例来源:origin: eclipse/rdf4j
@Override
public ZeroLengthPath clone() {
ZeroLengthPath clone = (ZeroLengthPath)super.clone();
clone.setSubjectVar(getSubjectVar().clone());
clone.setObjectVar(getObjectVar().clone());
if (getContextVar() != null) {
clone.setContextVar(getContextVar().clone());
}
return clone;
}
}
代码示例来源:origin: Merck/Halyard
/**
* Evaluate {@link ZeroLengthPath} query model nodes
* @param parent
* @param zlp
* @param bindings
*/
private void evaluateZeroLengthPath(BindingSetPipe parent, ZeroLengthPath zlp, BindingSet bindings) {
final Var subjectVar = zlp.getSubjectVar();
final Var objVar = zlp.getObjectVar();
final Var contextVar = zlp.getContextVar();
Value subj = subjectVar.getValue() == null ? bindings.getValue(subjectVar.getName()) : subjectVar.getValue();
Value obj = objVar.getValue() == null ? bindings.getValue(objVar.getName()) : objVar.getValue();
if (subj != null && obj != null) {
if (!subj.equals(obj)) {
try {
parent.push(null);
} catch (InterruptedException e) {
parent.handleException(e);
}
return;
}
}
//temporary solution using copy of the original iterator
//re-writing this to push model is a bit more complex task
HalyardStatementPatternEvaluation.enqueue(parent, new ZeroLengthPathIteration(parentStrategy, subjectVar, objVar, subj, obj, contextVar, bindings), zlp);
}
本文整理了Java中org.openrdf.query.algebra.ZeroLengthPath.getObjectVar()方法的一些代码示例,展示了ZeroLengthPath.getObje
本文整理了Java中org.eclipse.rdf4j.query.algebra.ZeroLengthPath.getObjectVar()方法的一些代码示例,展示了ZeroLengthPath.g
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