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XML Schema Object Model (XSOM) is a Java library that allows applications to easily parse XML Schema
documents and inspect information in them. It is expected to be useful for applications that need to take XML
Schema as an input.
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package com.sun.xml.xsom.impl.parser;
import com.sun.xml.xsom.XSAttGroupDecl;
import com.sun.xml.xsom.XSAttributeDecl;
import com.sun.xml.xsom.XSComplexType;
import com.sun.xml.xsom.XSDeclaration;
import com.sun.xml.xsom.XSElementDecl;
import com.sun.xml.xsom.XSIdentityConstraint;
import com.sun.xml.xsom.XSModelGroupDecl;
import com.sun.xml.xsom.XSSchemaSet;
import com.sun.xml.xsom.XSSimpleType;
import com.sun.xml.xsom.XSTerm;
import com.sun.xml.xsom.XSType;
import com.sun.xml.xsom.impl.Ref;
import com.sun.xml.xsom.impl.SchemaImpl;
import com.sun.xml.xsom.impl.UName;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
/**
* Reference by name.
*
* UName will be later resolved to a target object,
* after all the schemas are parsed.
*/
public abstract class DelayedRef implements Patch {
DelayedRef( PatcherManager _manager, Locator _source, SchemaImpl _schema, UName _name ) {
this.schema = _schema.getRoot();
this.manager = _manager;
this.name = _name;
this.source = _source;
if(name==null) throw new InternalError();
manager.addPatcher(this);
}
/**
* Patch implementation. Makes sure that the name resolves
* to a schema component.
*/
public void run() throws SAXException {
if(ref==null) // redefinition can set ref without actually resolving the reference
resolve();
manager = null; // avoid keeping the reference too long
name = null;
source = null;
}
protected final XSSchemaSet schema;
private PatcherManager manager;
private UName name;
/** location in the source file where this reference was made. */
private Locator source;
protected abstract Object resolveReference( UName name );
protected abstract String getErrorProperty();
private Object ref=null;
protected final Object _get() {
if(ref==null) throw new InternalError("unresolved reference");
return ref;
}
private void resolve() throws SAXException {
ref = resolveReference(name);
if(ref==null)
manager.reportError(
Messages.format(getErrorProperty(),name.getQualifiedName()),
source );
}
/**
* If this reference refers to the given declaration,
* resolve the reference now. This is used to implement redefinition.
*/
public void redefine(XSDeclaration d) {
if( !d.getTargetNamespace().equals(name.getNamespaceURI())
|| !d.getName().equals(name.getName()) )
return;
ref = d;
manager = null;
name = null;
source = null;
}
public static class Type extends DelayedRef implements Ref.Type {
public Type( PatcherManager manager, Locator loc, SchemaImpl schema, UName name ) {
super(manager,loc,schema,name);
}
protected Object resolveReference( UName name ) {
Object o = super.schema.getSimpleType(
name.getNamespaceURI(), name.getName() );
if(o!=null) return o;
return super.schema.getComplexType(
name.getNamespaceURI(),
name.getName());
}
protected String getErrorProperty() {
return Messages.ERR_UNDEFINED_TYPE;
}
public XSType getType() { return (XSType)super._get(); }
}
public static class SimpleType extends DelayedRef implements Ref.SimpleType {
public SimpleType( PatcherManager manager, Locator loc, SchemaImpl schema, UName name ) {
super(manager,loc,schema,name);
}
public XSSimpleType getType() { return (XSSimpleType)_get(); }
protected Object resolveReference( UName name ) {
return super.schema.getSimpleType(
name.getNamespaceURI(),
name.getName());
}
protected String getErrorProperty() {
return Messages.ERR_UNDEFINED_SIMPLETYPE;
}
}
public static class ComplexType extends DelayedRef implements Ref.ComplexType {
public ComplexType( PatcherManager manager, Locator loc, SchemaImpl schema, UName name ) {
super(manager,loc,schema,name);
}
protected Object resolveReference( UName name ) {
return super.schema.getComplexType(
name.getNamespaceURI(),
name.getName());
}
protected String getErrorProperty() {
return Messages.ERR_UNDEFINED_COMPLEXTYPE;
}
public XSComplexType getType() { return (XSComplexType)super._get(); }
}
public static class Element extends DelayedRef implements Ref.Element {
public Element( PatcherManager manager, Locator loc, SchemaImpl schema, UName name ) {
super(manager,loc,schema,name);
}
protected Object resolveReference( UName name ) {
return super.schema.getElementDecl(
name.getNamespaceURI(),
name.getName());
}
protected String getErrorProperty() {
return Messages.ERR_UNDEFINED_ELEMENT;
}
public XSElementDecl get() { return (XSElementDecl)super._get(); }
public XSTerm getTerm() { return get(); }
}
public static class ModelGroup extends DelayedRef implements Ref.Term {
public ModelGroup( PatcherManager manager, Locator loc, SchemaImpl schema, UName name ) {
super(manager,loc,schema,name);
}
protected Object resolveReference( UName name ) {
return super.schema.getModelGroupDecl(
name.getNamespaceURI(),
name.getName());
}
protected String getErrorProperty() {
return Messages.ERR_UNDEFINED_MODELGROUP;
}
public XSModelGroupDecl get() { return (XSModelGroupDecl)super._get(); }
public XSTerm getTerm() { return get(); }
}
public static class AttGroup extends DelayedRef implements Ref.AttGroup {
public AttGroup( PatcherManager manager, Locator loc, SchemaImpl schema, UName name ) {
super(manager,loc,schema,name);
}
protected Object resolveReference( UName name ) {
return super.schema.getAttGroupDecl(
name.getNamespaceURI(),
name.getName());
}
protected String getErrorProperty() {
return Messages.ERR_UNDEFINED_ATTRIBUTEGROUP;
}
public XSAttGroupDecl get() { return (XSAttGroupDecl)super._get(); }
}
public static class Attribute extends DelayedRef implements Ref.Attribute {
public Attribute( PatcherManager manager, Locator loc, SchemaImpl schema, UName name ) {
super(manager,loc,schema,name);
}
protected Object resolveReference( UName name ) {
return super.schema.getAttributeDecl(
name.getNamespaceURI(),
name.getName());
}
protected String getErrorProperty() {
return Messages.ERR_UNDEFINED_ATTRIBUTE;
}
public XSAttributeDecl getAttribute() { return (XSAttributeDecl)super._get(); }
}
public static class IdentityConstraint extends DelayedRef implements Ref.IdentityConstraint {
public IdentityConstraint( PatcherManager manager, Locator loc, SchemaImpl schema, UName name ) {
super(manager,loc,schema,name);
}
protected Object resolveReference( UName name ) {
return super.schema.getIdentityConstraint(
name.getNamespaceURI(),
name.getName());
}
protected String getErrorProperty() {
return Messages.ERR_UNDEFINED_IDENTITY_CONSTRAINT;
}
public XSIdentityConstraint get() { return (XSIdentityConstraint)super._get(); }
}
}