Package org.geotools.filter

Class AttributeExpressionImpl

    • Field Detail

      • attPath

        protected String attPath
        Holds all sub filters of this filter.

      • schema

        protected SimpleFeatureType schema
        Used to validate attribute references to ensure they match the provided schema

      • namespaceSupport

        public NamespaceSupport namespaceSupport
        NamespaceSupport used to defining the prefix information for the xpath expression

      • lenient

        protected boolean lenient
        Configures whether evaluate should return null if it cannot find a working property accessor, rather than throwing an exception (default behaviour).

    • Constructor Detail

      • AttributeExpressionImpl

        protected AttributeExpressionImpl​(SimpleFeatureType schema)
        Constructor with the schema for this attribute.
        Parameters:
        schema - The schema for this attribute.

      • AttributeExpressionImpl

        public AttributeExpressionImpl​(String xpath)
        Constructor with schema and path to the attribute.
        Parameters:
        xpath - the String xpath to the attribute.

      • AttributeExpressionImpl

        public AttributeExpressionImpl​(Name name)
        Constructor with full attribute name.
        Parameters:
        name - Attribute Name.

      • AttributeExpressionImpl

        public AttributeExpressionImpl​(String xpath,
                               NamespaceSupport namespaceContext)
        Constructor with schema and path to the attribute.
        Parameters:
        xpath - the String xpath to the attribute.
        namespaceContext - Defining the prefix information for the xpath expression

      • AttributeExpressionImpl

        public AttributeExpressionImpl​(String xpath,
                               Hints hints)
        Parameters:
        xpath - xpath expression
        hints - Hints passed to the property accessor during evaulation

      • AttributeExpressionImpl

        protected AttributeExpressionImpl​(SimpleFeatureType schema,
                                  String attPath)
                           throws IllegalFilterException
        Constructor with schema and path to the attribute.
        Parameters:
        schema - The initial (required) sub filter.
        attPath - the xpath to the attribute.
        Throws:
        IllegalFilterException - If the attribute path is not in the schema.

    • Method Detail

      • getNamespaceContext

        public NamespaceSupport getNamespaceContext()
        Description copied from interface: PropertyName
        Returns namespace context information, or null if unavailable/inapplicable
        Specified by:
        getNamespaceContext in interface PropertyName
        Returns:
        namespace context information, or null if unavailable/inapplicable

      • setPropertyName

        public void setPropertyName​(String attPath)

      • evaluate

        public Object evaluate​(Object obj)
        Gets the value of this property from the passed object.
        Specified by:
        evaluate in interface Expression
        Overrides:
        evaluate in class ExpressionAbstract
        Parameters:
        obj - Object from which we need to extract a property value.
        Returns:
        default implementation returns null

      • evaluate

        public <T> T evaluate​(Object obj,
                      Class<T> target)
        Gets the value of this attribute from the passed object.
        Specified by:
        evaluate in interface Expression
        Overrides:
        evaluate in class ExpressionAbstract
        Type Parameters:
        T - The type of the returned object.
        Parameters:
        obj - Object from which to extract attribute value.
        target - Target Class
        Returns:
        Evaluates the given expression based on the content of the given object an an instance of context.

      • toString

        public String toString()
        Return this expression as a string.
        Overrides:
        toString in class Object
        Returns:
        String representation of this attribute expression.

      • equals

        public boolean equals​(Object obj)
        Compares this filter to the specified object. Returns true if the passed in object is the same as this expression. Checks to make sure the expression types are the same as well as the attribute paths and schemas.
        Overrides:
        equals in class Object
        Parameters:
        obj - - the object to compare this ExpressionAttribute against.
        Returns:
        true if specified object is equal to this filter; else false

      • hashCode

        public int hashCode()
        Override of hashCode method.
        Overrides:
        hashCode in class Object
        Returns:
        a code to hash this object by.

      • accept

        public Object accept​(ExpressionVisitor visitor,
                     Object extraData)
        Used by FilterVisitors to perform some action on this filter instance. Typicaly used by Filter decoders, but may also be used by any thing which needs infomration from filter structure. Implementations should always call: visitor.visit(this); It is importatant that this is not left to a parent class unless the parents API is identical.
        Specified by:
        accept in interface Expression
        Parameters:
        visitor - The visitor which requires access to this filter, the method must call visitor.visit(this);

      • setLenient

        public void setLenient​(boolean lenient)
        Sets lenient property.

      • isLenient

        public boolean isLenient()
        Gets lenient property
        Returns:
        lenient