Package eu.europa.ted.efx.model

Class ContextStack

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractList<E>

java.util.Vector<E>

java.util.Stack<Context>

eu.europa.ted.efx.model.ContextStack

All Implemented Interfaces:

Serializable, Cloneable, Iterable<Context>, Collection<Context>, List<Context>, RandomAccess

public class ContextStack
extends Stack<Context>

Used to keep trak of the current evaluation context. Extends Stack<Context> to provide helper methods for pushing directly using a fieldId or a nodeId. The point is to make it easier to use a context stack and reduce the possibility of coding mistakes.

See Also:

Serialized Form

Field Summary

Fields inherited from class java.util.Vector

capacityIncrement, elementCount, elementData

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

Constructors

Constructor	Description
ContextStack(SymbolResolver symbols)	Creates a new ContextStack.

Method Summary

Modifier and Type	Method	Description
Expression.PathExpression	absolutePath()	Returns the absolute path of the context that is currently at the top of the stack.
Boolean	isFieldContext()	Returns true if the context at the top of the stack is a Context.FieldContext.
Boolean	isNodeContext()	Returns true if the context at the top of the stack is a Context.NodeContext.
Context.FieldContext	pushFieldContext(String fieldId)	Creates a new Context for the given field and places it at the top of the stack.
Context.NodeContext	pushNodeContext(String nodeId)	Creates a new Context for the given node and places it at the top of the stack.
Expression.PathExpression	relativePath()	Returns the relative path of the context that is currently at the top of the stack.
String	symbol()	Returns the [field or node] identifier that was used to create the context that is currently at the top of the stack.

Methods inherited from class java.util.Stack

empty, peek, pop, push, search

Methods inherited from class java.util.Vector

add, add, addAll, addAll, addElement, capacity, clear, clone, contains, containsAll, copyInto, elementAt, elements, ensureCapacity, equals, firstElement, forEach, get, hashCode, indexOf, indexOf, insertElementAt, isEmpty, iterator, lastElement, lastIndexOf, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, removeAllElements, removeElement, removeElementAt, removeIf, removeRange, replaceAll, retainAll, set, setElementAt, setSize, size, sort, spliterator, subList, toArray, toArray, toString, trimToSize

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, stream, toArray

Constructor Detail

ContextStack

public ContextStack(SymbolResolver symbols)

Creates a new ContextStack.

Parameters:

symbols - the SymbolMap is used to resolve fieldIds and nodeIds.

Method Detail

pushFieldContext

public Context.FieldContext pushFieldContext(String fieldId)

Creates a new Context for the given field and places it at the top of the stack. The new Context is determined by the field itself, and it is made to be relative to the one currently at the top of the stack (or absolute if the stack is empty).

pushNodeContext

public Context.NodeContext pushNodeContext(String nodeId)

Creates a new Context for the given node and places it at the top of the stack. The new Context is relative to the one currently at the top of the stack (or absolute if the stack is empty).

isFieldContext

public Boolean isFieldContext()

Returns true if the context at the top of the stack is a Context.FieldContext. Does not remove the context from the stack.

isNodeContext

public Boolean isNodeContext()

Returns true if the context at the top of the stack is a Context.NodeContext. Does not remove the context from the stack.

symbol

public String symbol()

Returns the [field or node] identifier that was used to create the context that is currently at the top of the stack. Does not remove the context from the stack.

absolutePath

public Expression.PathExpression absolutePath()

Returns the absolute path of the context that is currently at the top of the stack. Does not remove the context from the stack.

relativePath

public Expression.PathExpression relativePath()

Returns the relative path of the context that is currently at the top of the stack. Does not remove the context from the stack.