Package gnu.kawa.xml

Class NodeType

java.lang.Object
gnu.bytecode.Type
gnu.bytecode.ObjectType
gnu.kawa.xml.NodeType
All Implemented Interfaces:
TypeValue, ItemPredicate, NodePredicate, Externalizable, Serializable, Type
Direct Known Subclasses:
AttributeType, ElementType, ProcessingInstructionType
public class NodeType extends ObjectType implements TypeValue, NodePredicate, Externalizable
A SeqPosition used to represent a node in (usually) a TreeList. This is special in that the represented node is the current position of the SeqPosition - but when passed to a method it is only valid during that method. After the method returns, the caller is free to change the position, so if the node is saved in a data structure it must be copied.
See Also:

  • Field Details

  • Constructor Details

    • NodeType

      public NodeType(String name, int kinds)

    • NodeType

      public NodeType(String name)

  • Method Details

    • emitCoerceFromObject

      public void emitCoerceFromObject(CodeAttr code)
      Description copied from class: ObjectType
      Compile (in given method) cast from Object to this Type.
      Overrides:
      emitCoerceFromObject in class ObjectType

    • convertValue

      public Expression convertValue(Expression value)
      Description copied from interface: TypeValue
      Return converted expression or null.
      Specified by:
      convertValue in interface TypeValue

    • coerceFromObject

      public Object coerceFromObject(Object obj)
      Description copied from class: Type
      Convert an object to a value of this Type. The result is actually of the implementation type, boxed as appropriate, so it is suitable for standard reflective operations, like the arguments to Field#set or Method#invoke. Throw a ClassCastException when this is not possible.
      Overrides:
      coerceFromObject in class ObjectType

    • getImplementationType

      public Type getImplementationType()
      Description copied from class: Type
      Return Java-level implementation type. The type used to implement types not natively understood by the JVM or the Java language. Usually, the identity function. However, a language might handle union types or template types or type expressions calculated at run time. In that case return the type used at the Java level, and known at compile time.
      Specified by:
      getImplementationType in interface TypeValue
      Overrides:
      getImplementationType in class Type

    • compare

      public int compare(Type other)
      Description copied from class: Type
      Return a numeric code showing "subtype" relationship: 1: if other is a pure subtype of this; 0: if has the same values; -1: if this is a pure subtype of other; -2: if they have values in common but neither is a subtype of the other; -3: if the types have no values in common. "Same values" is rather loose; by "A is a subtype of B" we mean that all instance of A can be "widened" to B. More formally, A.compare(B) returns: 1: all B values can be converted to A without a coercion failure (i.e. a ClassCastException or overflow or major loss of information), but not vice versa. 0: all A values can be converted to B without a coercion failure and vice versa; -1: all A values can be converted to B without a coercion failure but not vice versa; -2: there are (potentially) some A values that can be converted to B, and some B values can be converted to A; -3: there are no A values that can be converted to B, and neither are there any B values that can be converted to A.
      Overrides:
      compare in class ObjectType

    • isInstance

      public boolean isInstance(Object obj)
      Overrides:
      isInstance in class ObjectType

    • isInstancePos

      public boolean isInstancePos(AbstractSequence seq, int ipos)
      Specified by:
      isInstancePos in interface ItemPredicate

    • isInstance

      public static boolean isInstance(AbstractSequence seq, int ipos, int kinds)

    • coerceForce

      public static KNode coerceForce(Object obj, int kinds)

    • coerceOrNull

      public static KNode coerceOrNull(Object obj, int kinds)

    • emitCoerceOrNullMethod

      protected void emitCoerceOrNullMethod(Variable incoming, Compilation comp)

    • emitTestIf

      public void emitTestIf(Variable incoming, Declaration decl, Compilation comp)
      Description copied from interface: TypeValue
      Emit code for if (incoming instanceof this_type) decl = incoming .... This method is designed for typeswitch applications, where this call is the first part of a conditional, so it must be followed by calls to emitElse and emitFi.
      Specified by:
      emitTestIf in interface TypeValue
      Parameters:
      incoming - Contains the value we are testing to see if it has the type of this. If null, use top-of-stack. May not be null if decl is non-null.
      decl - If non-null, assign value after coercion to Declaration.
      comp - The compilation state.

    • emitIsInstance

      public void emitIsInstance(Variable incoming, Compilation comp, Target target)
      Description copied from interface: TypeValue
      Emit code for incoming instanceof this_type. The implementation can use InstanceOf .emitIsInstance which is a conveniece method that calls emitTestIf.
      Specified by:
      emitIsInstance in interface TypeValue
      Parameters:
      incoming - Contains the value we are testing to see if it has the the type of 'this'. If null, use top-of-stack.
      comp - The compilation state.
      target - Where to leave the result.

    • getConstructor

      public Procedure getConstructor()
      Description copied from interface: TypeValue
      Get the constructor function for this type. Returns null if there is no contructor function. Also returns null if this extends ClassType or ArrayType and standard Java constructors (<init> methods) should be used.
      Specified by:
      getConstructor in interface TypeValue

    • toString

      public String toString()
      Overrides:
      toString in class Type

    • writeExternal

      public void writeExternal(ObjectOutput out) throws IOException
      Specified by:
      writeExternal in interface Externalizable
      Throws:
      IOException

    • readExternal

      public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
      Specified by:
      readExternal in interface Externalizable
      Throws:
      IOException
      ClassNotFoundException