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## com.saxonica.schema
Interface ComponentReference

All Superinterfaces:
  SourceLocator

All Known Implementing Classes:
  AttributeGroupReference, AttributeUse, ElementParticle, GroupReference, KeyRef, SimpleComponentReference, TypeReference

    public interface ComponentReference

extends SourceLocator

A reference to a schema component. The reference may have been resolved to a specific component, or may be as yet unresolved. Any attempt to use a reference that has not yet been resolved causes an unchecked exception.

Method Summary
`SchemaAwareConfiguration` | `getConfiguration()` Determine the configuration containing this reference (and its target)
`int` | `getFingerprint()` Get the fingerprint of the target of this reference
`int` | `getSymbolSpace()` Get the symbol space of the target of this reference
`SchemaComponent` | `getTarget()` Get the schema component identified by this reference.
`boolean` | `isResolved()` Determine whether this reference has been resolved
`void` | `tryToResolve(SchemaCompiler compiler)` Try to resolve the reference if possible, relative to components present in a given schema.

Methods inherited from interface javax.xml.transform.SourceLocator
`getColumnNumber, getLineNumber, getPublicId, getSystemId`

Method Detail

### getConfiguration

    SchemaAwareConfiguration getConfiguration()

  Determine the configuration containing this reference (and its target)

### tryToResolve

    void tryToResolve(SchemaCompiler compiler)

  Try to resolve the reference if possible, relative to components present in a given schema. No error occurs if the reference cannot yet be resolved.

  Parameters:
    `compiler` - The compiler being used to compile the referring component. This is assumed to know about the schema containing the candidate target components for the reference. If null, the schema containing the reference is used.

### isResolved

    boolean isResolved()

  Determine whether this reference has been resolved

### getTarget

    SchemaComponent getTarget()
                              throws UnresolvedReferenceException

  Get the schema component identified by this reference.

  Returns:
    the schema component if the reference has been resolved.
  Throws:
    `UnresolvedReferenceException` - if the reference has not been resolved. Note that this is an unchecked exception.

### getFingerprint

    int getFingerprint()

  Get the fingerprint of the target of this reference

### getSymbolSpace

    int getSymbolSpace()

  Get the symbol space of the target of this reference

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Copyright (C) Michael H. Kay. All rights reserved.