Class StructMemberAccessExpression

Method Details

• build

  public static nz.org.riskscape.problem.ResultOrProblems<StructMemberAccessExpression> build(nz.org.riskscape.engine.types.Type sourceType, List<String> segments)

  Construct a StructMemberAccessExpression that will access the given type, using the path expression broken down in to a list of segments.

  Parameters:

  sourceType - the type of thing being accessed, should be, or wrap, a Struct, or the result will fail

  segments - the list of attributes to traverse when accessing a property. If these properties don't exist on the given type, and it's child types, then the result will fail.

• getRootStruct

  public nz.org.riskscape.engine.types.Struct getRootStruct()

  Returns:

  the struct that owns the first path segment in this expression. All tuples given to this expression's evaluate methods must have the same struct object as this of bad things will happen.

• evaluateType

  public nz.org.riskscape.problem.ResultOrProblems<nz.org.riskscape.engine.types.Type> evaluateType(nz.org.riskscape.engine.types.Type sourceType)

  Description copied from interface: TypedExpression

  The riskscape type this expression will return as a Value

  Specified by:

  evaluateType in interface TypedExpression

• getType

  public nz.org.riskscape.engine.types.Type getType()

• setValue

  public void setValue(nz.org.riskscape.engine.Tuple object, Object toSet)

  Use this expression to set a value to a tuple, rather than fetch it. This method is not type-safe in the sense that it allows you to set a invariant value to the tuple - it is on you to check it before it goes in.

  If a child tuple is null along the way, it will be created using the type found in this member's root struct

  Parameters:

  object - target tuple to modify.

  toSet - a value to set to the tuple (or one of its children)

  Throws:

  IllegalArgumentException - if tuple not of the exact same type used to build this expression

• evaluate

  public Object evaluate(Object object)

  Specified by:

  evaluate in interface org.geotools.api.filter.expression.Expression

• evaluate

  public <T> T evaluate(Object object, Class<T> context)

  Specified by:

  evaluate in interface org.geotools.api.filter.expression.Expression

• toString

  public String toString()

  Overrides:

  toString in class Object

• accept

  public Object accept(org.geotools.api.filter.expression.ExpressionVisitor visitor, Object extraData)

  Specified by:

  accept in interface org.geotools.api.filter.expression.Expression

• getPropertyName

  public String getPropertyName()

  Specified by:

  getPropertyName in interface org.geotools.api.filter.expression.PropertyName

• getSegments

  public List<nz.org.riskscape.engine.types.Struct.StructMember> getSegments()

• getNamespaceContext

  public NamespaceSupport getNamespaceContext()

  Specified by:

  getNamespaceContext in interface org.geotools.api.filter.expression.PropertyName

• toExpression

  public nz.org.riskscape.rl.ast.Expression toExpression()

• equals

  public boolean equals(Object o)

  Overrides:

  equals in class Object

• canEqual

  protected boolean canEqual(Object other)

• hashCode

  public int hashCode()

  Overrides:

  hashCode in class Object