本文整理了Java中com.mysema.query.types.Path.getRoot()方法的一些代码示例，展示了Path.getRoot()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。Path.getRoot()方法的具体详情如下：
包路径：com.mysema.query.types.Path
类名称：Path
方法名：getRoot

Path.getRoot介绍

[英]Get the root for this path
[中]获取此路径的根

代码示例

代码示例来源：origin: com.mysema.querydsl/querydsl-core

@Override
public Set<Expression<?>> visit(Path<?> expr, Set<Expression<?>> known) {
  if (!known.contains(expr.getRoot())) {
    throw new IllegalArgumentException(String.format(errorTemplate,  expr.getRoot()));
  }
  return known;
}

代码示例来源：origin: com.mysema.querydsl/querydsl-core

private <P extends Path<?>> P assertRoot(P p) {
  if (!p.getRoot().equals(p)) {
    throw new IllegalArgumentException(p + " is not a root path");
  }
  return p;
}

代码示例来源：origin: com.mysema.querydsl/querydsl-core

public PathMetadata(@Nullable Path<?> parent, Object element, PathType type) {
  this.parent = parent;
  this.element = element;
  this.pathType = type;
  this.root = parent != null ? parent.getRoot() : null;
  this.hashCode = 31 * element.hashCode() + pathType.name().hashCode();
}

代码示例来源：origin: com.mysema.querydsl/querydsl-collections

/**
 * Wrap a Querydsl predicate into a Guava predicate
 * 
 * @param predicate
 * @return
 */
public static <T> com.google.common.base.Predicate<T> wrap(Predicate predicate) {        
  Path<?> path = (Path<?>)predicate.accept(PathExtractor.DEFAULT, null);
  if (path != null) {
    final Evaluator<Boolean> ev = createEvaluator(path.getRoot(), predicate);
    return new com.google.common.base.Predicate<T>() {
      @Override
      public boolean apply(T input) {
        return ev.evaluate(input);
      }                
    };
  } else {
    throw new IllegalArgumentException("No path in " + predicate);
  }
}

代码示例来源：origin: com.mysema.querydsl/querydsl-collections

/**
 * Wrap a Querydsl expression into a Guava function
 * 
 * @param projection
 * @return
 */
public static <F,T> Function<F,T> wrap(Expression<T> projection) {        
  Path<?> path = (Path<?>)projection.accept(PathExtractor.DEFAULT, null);
  if (path != null) {
    final Evaluator<T> ev = createEvaluator(path.getRoot(), projection);
    return new Function<F,T>() {
      @Override
      public T apply(F input) {
        return ev.evaluate(input);
      }                
    };
  } else {
    throw new IllegalArgumentException("No path in " + projection);
  }
}

代码示例来源：origin: org.neo4j/neo4j-cypher-dsl

public static StringProperty string( Path<?> entityPath )
{
  return identifier(entityPath.getRoot().toString()).string( entityPath.getMetadata().getExpression().toString() );
}

代码示例来源：origin: org.neo4j/neo4j-cypher-dsl

public static NumberProperty number( Path<?> entityPath )
{
  return identifier(entityPath.getRoot().toString()).number( entityPath.getMetadata().getExpression().toString() );
}

代码示例来源：origin: org.neo4j/neo4j-cypher-dsl

public static Property property( Path<?> entityPath )
{
  return identifier(entityPath.getRoot().toString()).property( entityPath.getMetadata().getExpression().toString() );
}

代码示例来源：origin: com.mysema.querydsl/querydsl-mongodb

@Nullable
protected Predicate createJoinFilter(QueryMetadata metadata) {
  Multimap<Expression<?>, Predicate> predicates = HashMultimap.<Expression<?>, Predicate>create();
  List<JoinExpression> joins = metadata.getJoins();
  for (int i = joins.size() - 1; i >= 0; i--) {
    JoinExpression join = joins.get(i);
    Path source = (Path)((Operation<?>)join.getTarget()).getArg(0);
    Path target = (Path)((Operation<?>)join.getTarget()).getArg(1);
    Collection<Predicate> extraFilters = predicates.get(target.getRoot());
    Predicate filter = ExpressionUtils.allOf(join.getCondition(), allOf(extraFilters));
    List<Object> ids = getIds(target.getType(), filter);
    if (ids.isEmpty()) {
      throw new NoResults();
    }
    Path path = new PathImpl<String>(String.class, source, "$id");
    predicates.put(source.getRoot(), ExpressionUtils.in(path, ids));
  }
  Path source = (Path)((Operation)joins.get(0).getTarget()).getArg(0);
  return allOf(predicates.get(source.getRoot()));
}

代码示例来源：origin: org.neo4j/neo4j-cypher-dsl

public Object arg(com.mysema.query.types.Expression expression)
  {
    if (expression instanceof Constant)
      return ((Constant)expression).getConstant();
    else if (expression instanceof ParamExpression)
      return param( ( (ParamExpression) expression ).getName() );
    else if (expression instanceof Path)
    {
      Path path = (Path) expression;
      return identifier( path.getRoot()).string( path.getMetadata().getExpression().toString() );
    }
    else
      throw new IllegalArgumentException("Unknown argument type:"+expression);
  }
}, null ));