// Copyright (c) 2003  Per M.A. Bothner.// This is free software;  for terms and warranty disclaimer see ./COPYING.package gnu.kawa.xml;import gnu.bytecode.*;import gnu.lists.*;import gnu.xml.*;import gnu.expr.*;import java.io.*;import gnu.mapping.Symbol;/** Matches an attribute name pattern. * FIXME:  ElementType and AttributeType should both inherit * from a common NamedNodeType class. */public class AttributeType extends NodeTypeimplements TypeValue, Externalizable, AttributePredicate{  Symbol qname;  public static AttributeType make (String namespaceURI, String localName)  {    Symbol qname;    if (namespaceURI != null)      qname = Symbol.make(namespaceURI, localName);    else if (localName == ElementType.MATCH_ANY_LOCALNAME)      qname = ElementType.MATCH_ANY_QNAME;    else      qname = new Symbol(null, localName);    return new AttributeType(qname);  }  public static AttributeType make (Symbol qname)  {    return new AttributeType(qname);  }  public AttributeType(Symbol qname)  {    this(null, qname);  }  public AttributeType(String name, Symbol qname)  {    super(name != null && name.length() > 0 ? name	    : "ATTRIBUTE "+qname+" (*)");    this.qname = qname;  }  public Type getImplementationType()  {    return ClassType.make("gnu.kawa.xml.KAttr");  }  public final String getNamespaceURI () { return qname.getNamespaceURI(); }  public final String getLocalName () { return qname.getLocalName(); }  public void emitCoerceFromObject (CodeAttr code)  {    code.emitPushString(qname.getNamespaceURI());    code.emitPushString(qname.getLocalName());    code.emitInvokeStatic(coerceMethod);  }  public Object coerceFromObject (Object obj)  {    return coerce(obj, qname.getNamespaceURI(), qname.getLocalName());  }  public boolean isInstancePos (AbstractSequence seq, int ipos)  {    int kind = seq.getNextKind(ipos);    if (kind == Sequence.ATTRIBUTE_VALUE)      return isInstance(seq, ipos, seq.getNextTypeObject(ipos));    if (kind == Sequence.OBJECT_VALUE)      return isInstance(seq.getPosNext(ipos));    return false;  }  public boolean isInstance(AbstractSequence seq, int ipos, Object attrType)  {    String namespaceURI = qname.getNamespaceURI();    String localName = qname.getLocalName();    String curNamespaceURI;    String curLocalName;    if (attrType instanceof Symbol)      {	Symbol qname = (Symbol) attrType;	curNamespaceURI = qname.getNamespaceURI();	curLocalName = qname.getLocalName();      }    /* #ifdef JAXP-1.3 */    // else if (attrType instanceof javax.xml.namespace.QName)    //   {    //     javax.xml.namespace.QName qtype    //       = (javax.xml.namespace.QName) attrType;    //     curNamespaceURI = qtype.getNamespaceURI();    //     curLocalName = qtype.getLocalPart();    //   }    /* #endif */    else      {	curNamespaceURI = "";	curLocalName = attrType.toString().intern();  // FIXME      }    if (localName != null && localName.length() == 0)      localName = null;    return ((localName == curLocalName || localName == null)	    && (namespaceURI == curNamespaceURI || namespaceURI == null));  }  public boolean isInstance (Object obj)  {    return  coerceOrNull(obj, qname.getNamespaceURI(),qname.getLocalName())      != null;  }  public static SeqPosition coerceOrNull (Object obj,				    String namespaceURI, String localName)  {    SeqPosition pos = NodeType.coerceOrNull(obj, ATTRIBUTE_OK);    if (pos == null)      return null;    if (localName != null && localName.length() == 0)      localName = null;    Object curName = pos.getNextTypeObject();    String curNamespaceURI;    String curLocalName;    if (curName instanceof Symbol)      {	Symbol qname = (Symbol) curName;	curNamespaceURI = qname.getNamespaceURI();	curLocalName = qname.getLocalName();      }    /* #ifdef JAXP-1.3 */    // else if (curName instanceof javax.xml.namespace.QName)    //   {    //     javax.xml.namespace.QName qtype    //       = (javax.xml.namespace.QName) curName;    //     curNamespaceURI = qtype.getNamespaceURI();    //     curLocalName = qtype.getLocalPart();    //   }    /* #endif */    else      {	curNamespaceURI = "";	curLocalName = curName.toString().intern();  // FIXME      }    if ((localName == curLocalName || localName == null)	&& (namespaceURI == curNamespaceURI || namespaceURI == null))      return pos;    return null;  }  public static SeqPosition coerce (Object obj,				    String namespaceURI, String localName)  {    SeqPosition pos = coerceOrNull(obj, namespaceURI, localName);    if (pos == null)      throw new ClassCastException();    return pos;  }  protected void emitCoerceOrNullMethod(Variable incoming, Compilation comp)  {    CodeAttr code = comp.getCode();    if (incoming != null)      code.emitLoad(incoming);    code.emitPushString(qname.getNamespaceURI());    code.emitPushString(qname.getLocalName());    code.emitInvokeStatic(coerceOrNullMethod);  }  public static final ClassType typeAttributeType    = ClassType.make("gnu.kawa.xml.AttributeType");  static final Method coerceMethod    = typeAttributeType.getDeclaredMethod("coerce", 3);  static final Method coerceOrNullMethod    = typeAttributeType.getDeclaredMethod("coerceOrNull", 3);  public void writeExternal(ObjectOutput out) throws IOException  {    String name = getName();    out.writeUTF(name == null ? "" : name);    out.writeObject(qname);  }  public void readExternal(ObjectInput in)    throws IOException, ClassNotFoundException  {    String name = in.readUTF();    if (name.length() > 0)      setName(name);    qname = (Symbol) in.readObject();  }  public String toString ()  {    return "AttributeType " + qname;  }}