org.apache.xalan.templates

## Class AVT

- java.lang.Object
- - org.apache.xalan.templates.AVT

- All Implemented Interfaces:
    java.io.Serializable, XSLTVisitable

      public class AVT
      extends java.lang.Object
      implements java.io.Serializable, XSLTVisitable

  Class to hold an Attribute Value Template.
  See Also:
    Serialized Form
  Usage:
    **For advanced use only**

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `AVT(StylesheetHandler handler, java.lang.String uri, java.lang.String name, java.lang.String rawName, java.lang.String stringedValue, ElemTemplateElement owner)` Construct an AVT by parsing the string, and either constructing a vector of AVTParts, or simply hold on to the string if the AVT is simple.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `callVisitors(XSLTVisitor visitor)` This will traverse the heararchy, calling the visitor for each member.
    `boolean` | `canTraverseOutsideSubtree()` Tell if this expression or it's subexpressions can traverse outside the current subtree.
    `java.lang.String` | `evaluate(XPathContext xctxt, int context, PrefixResolver nsNode)` Evaluate the AVT and return a String.
    `void` | `fixupVariables(java.util.Vector vars, int globalsSize)` This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.
    `java.lang.String` | `getName()` Get the local name of the attribute.
    `java.lang.String` | `getRawName()` Get the raw name of the attribute, with the prefix unprocessed.
    `java.lang.String` | `getSimpleString()` Get the AVT as the original string.
    `java.lang.String` | `getURI()` Get the namespace URI of the attribute.
    `boolean` | `isContextInsensitive()` Test whether the AVT is insensitive to the context in which it is being evaluated.
    `boolean` | `isSimple()` Returns true if this AVT is simple
    `void` | `setName(java.lang.String name)` Set the local name of the attribute.
    `void` | `setRawName(java.lang.String rawName)` Get the raw name of the attribute, with the prefix unprocessed.
    `void` | `setURI(java.lang.String uri)` Get the namespace URI of the attribute.

    - ### Methods inherited from class java.lang.Object

      `equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### AVT

          public AVT(StylesheetHandler handler,
             java.lang.String uri,
             java.lang.String name,
             java.lang.String rawName,
             java.lang.String stringedValue,
             ElemTemplateElement owner)
              throws TransformerException

      Construct an AVT by parsing the string, and either constructing a vector of AVTParts, or simply hold on to the string if the AVT is simple.
      Parameters:
        `handler` - non-null reference to StylesheetHandler that is constructing.
        `uri` - non-null reference to URI, "" if null namespace.
        `name` - non-null reference to name string.
        `rawName` - prefixed name.
        `stringedValue` - non-null raw string value.
      Throws:
        `TransformerException`

  - ### Method Detail

    - #### getRawName

          public java.lang.String getRawName()

      Get the raw name of the attribute, with the prefix unprocessed.
      Returns:
        non-null reference to prefixed name.

    - #### setRawName

          public void setRawName(java.lang.String rawName)

      Get the raw name of the attribute, with the prefix unprocessed.
      Parameters:
        `rawName` - non-null reference to prefixed name.

    - #### getName

          public java.lang.String getName()

      Get the local name of the attribute.
      Returns:
        non-null reference to name string.

    - #### setName

          public void setName(java.lang.String name)

      Set the local name of the attribute.
      Parameters:
        `name` - non-null reference to name string.

    - #### getURI

          public java.lang.String getURI()

      Get the namespace URI of the attribute.
      Returns:
        non-null reference to URI, "" if null namespace.

    - #### setURI

          public void setURI(java.lang.String uri)

      Get the namespace URI of the attribute.
      Parameters:
        `uri` - non-null reference to URI, "" if null namespace.

    - #### getSimpleString

          public java.lang.String getSimpleString()

      Get the AVT as the original string.
      Returns:
        The AVT as the original string

    - #### evaluate

          public java.lang.String evaluate(XPathContext xctxt,
                                  int context,
                                  PrefixResolver nsNode)
                                    throws TransformerException

      Evaluate the AVT and return a String.
      Parameters:
        `xctxt` - Te XPathContext to use to evaluate this.
        `context` - The current source tree context.
        `nsNode` - The current namespace context (stylesheet tree context).
      Returns:
        The AVT evaluated as a string
      Throws:
        `TransformerException`

    - #### isContextInsensitive

          public boolean isContextInsensitive()

      Test whether the AVT is insensitive to the context in which it is being evaluated. This is intended to facilitate compilation of templates, by allowing simple AVTs to be converted back into strings. Currently the only case we recognize is simple strings. ADDED 9/5/2000 to support compilation experiment
      Returns:
        True if the m_simpleString member of this AVT is not null

    - #### canTraverseOutsideSubtree

          public boolean canTraverseOutsideSubtree()

      Tell if this expression or it's subexpressions can traverse outside the current subtree.
      Returns:
        true if traversal outside the context node's subtree can occur.

    - #### fixupVariables

          public void fixupVariables(java.util.Vector vars,
                            int globalsSize)

      This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.
      Parameters:
        `vars` - List of QNames that correspond to variables. This list should be searched backwards for the first qualified name that corresponds to the variable reference qname. The position of the QName in the vector from the start of the vector will be its position in the stack frame (but variables above the globalsTop value will need to be offset to the current stack frame).

    - #### callVisitors

          public void callVisitors(XSLTVisitor visitor)

      Description copied from interface: `XSLTVisitable`
      This will traverse the heararchy, calling the visitor for each member. If the called visitor method returns false, the subtree should not be called.
      Specified by:
        `callVisitors` in interface `XSLTVisitable`
      Parameters:
        `visitor` - The visitor whose appropriate method will be called.
      See Also:
        `XSLTVisitable.callVisitors(XSLTVisitor)`

    - #### isSimple

          public boolean isSimple()

      Returns true if this AVT is simple

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