com.sun.tools.xjc.reader.dtd.ModelGroup Maven / Gradle / Ivy
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package com.sun.tools.xjc.reader.dtd;
import java.util.ArrayList;
import java.util.List;
import com.sun.xml.dtdparser.DTDEventListener;
/**
* @author Kohsuke Kawaguchi
*/
final class ModelGroup extends Term {
enum Kind {
CHOICE, SEQUENCE
}
Kind kind;
private final List terms = new ArrayList();
void normalize(List r, boolean optional) {
switch(kind) {
case SEQUENCE:
for( Term t : terms )
t.normalize(r,optional);
return;
case CHOICE:
Block b = new Block(isOptional()||optional,isRepeated());
addAllElements(b);
r.add(b);
return;
}
}
void addAllElements(Block b) {
for( Term t : terms )
t.addAllElements(b);
}
boolean isOptional() {
switch(kind) {
case SEQUENCE:
for( Term t : terms )
if(!t.isOptional())
return false;
return true;
case CHOICE:
for( Term t : terms )
if(t.isOptional())
return true;
return false;
default:
throw new IllegalArgumentException();
}
}
boolean isRepeated() {
switch(kind) {
case SEQUENCE:
return true;
case CHOICE:
for( Term t : terms )
if(t.isRepeated())
return true;
return false;
default:
throw new IllegalArgumentException();
}
}
void setKind(short connectorType) {
Kind k;
switch(connectorType) {
case DTDEventListener.SEQUENCE:
k = Kind.SEQUENCE;
break;
case DTDEventListener.CHOICE:
k = Kind.CHOICE;
break;
default:
throw new IllegalArgumentException();
}
assert kind==null || k==kind;
kind = k;
}
void addTerm(Term t) {
if (t instanceof ModelGroup) {
ModelGroup mg = (ModelGroup) t;
if(mg.kind==this.kind) {
terms.addAll(mg.terms);
return;
}
}
terms.add(t);
}
Term wrapUp() {
switch(terms.size()) {
case 0:
return EMPTY;
case 1:
assert kind==null;
return terms.get(0);
default:
assert kind!=null;
return this;
}
}
}