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package com.sun.tools.xjc.reader.xmlschema;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.Collections;
import com.sun.xml.xsom.XSAnnotation;
import com.sun.xml.xsom.XSAttGroupDecl;
import com.sun.xml.xsom.XSAttributeDecl;
import com.sun.xml.xsom.XSAttributeUse;
import com.sun.xml.xsom.XSComplexType;
import com.sun.xml.xsom.XSComponent;
import com.sun.xml.xsom.XSContentType;
import com.sun.xml.xsom.XSElementDecl;
import com.sun.xml.xsom.XSFacet;
import com.sun.xml.xsom.XSIdentityConstraint;
import com.sun.xml.xsom.XSModelGroup;
import com.sun.xml.xsom.XSModelGroupDecl;
import com.sun.xml.xsom.XSNotation;
import com.sun.xml.xsom.XSParticle;
import com.sun.xml.xsom.XSSchema;
import com.sun.xml.xsom.XSSchemaSet;
import com.sun.xml.xsom.XSSimpleType;
import com.sun.xml.xsom.XSType;
import com.sun.xml.xsom.XSWildcard;
import com.sun.xml.xsom.XSXPath;
import com.sun.xml.xsom.visitor.XSVisitor;
/**
* Finds which {@link XSComponent}s refer to which {@link XSComplexType}s.
*
* @author Kohsuke Kawaguchi
*/
final class RefererFinder implements XSVisitor {
private final Set<Object> visited = new HashSet<Object>();
private final Map<XSComponent,Set<XSComponent>> referers = new HashMap<XSComponent,Set<XSComponent>>();
public Set<XSComponent> getReferer(XSComponent src) {
Set<XSComponent> r = referers.get(src);
if(r==null) return Collections.emptySet();
return r;
}
public void schemaSet(XSSchemaSet xss) {
if(!visited.add(xss)) return;
for (XSSchema xs : xss.getSchemas()) {
schema(xs);
}
}
public void schema(XSSchema xs) {
if(!visited.add(xs)) return;
for (XSComplexType ct : xs.getComplexTypes().values()) {
complexType(ct);
}
for (XSElementDecl e : xs.getElementDecls().values()) {
elementDecl(e);
}
}
public void elementDecl(XSElementDecl e) {
if(!visited.add(e)) return;
refer(e,e.getType());
e.getType().visit(this);
}
public void complexType(XSComplexType ct) {
if(!visited.add(ct)) return;
refer(ct,ct.getBaseType());
ct.getBaseType().visit(this);
ct.getContentType().visit(this);
}
public void modelGroupDecl(XSModelGroupDecl decl) {
if(!visited.add(decl)) return;
modelGroup(decl.getModelGroup());
}
public void modelGroup(XSModelGroup group) {
if(!visited.add(group)) return;
for (XSParticle p : group.getChildren()) {
particle(p);
}
}
public void particle(XSParticle particle) {
// since the particle method is side-effect free, no need to check for double-visit.
particle.getTerm().visit(this);
}
// things we don't care
public void simpleType(XSSimpleType simpleType) {}
public void annotation(XSAnnotation ann) {}
public void attGroupDecl(XSAttGroupDecl decl) {}
public void attributeDecl(XSAttributeDecl decl) {}
public void attributeUse(XSAttributeUse use) {}
public void facet(XSFacet facet) {}
public void notation(XSNotation notation) {}
public void identityConstraint(XSIdentityConstraint decl) {}
public void xpath(XSXPath xp) {}
public void wildcard(XSWildcard wc) {}
public void empty(XSContentType empty) {}
/**
* Called for each reference to record the fact.
*
* So far we only care about references to types.
*/
private void refer(XSComponent source, XSType target) {
Set<XSComponent> r = referers.get(target);
if(r==null) {
r = new HashSet<XSComponent>();
referers.put(target,r);
}
r.add(source);
}
}