com.sun.msv.grammar.DataExp Maven / Gradle / Ivy
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package com.sun.msv.grammar;
import org.relaxng.datatype.Datatype;
import com.sun.msv.datatype.xsd.XSDatatype;
import com.sun.msv.util.StringPair;
/**
* Expression that matchs characters of the particular {@link Datatype}.
*
* @author Kohsuke KAWAGUCHI
*/
public final class DataExp extends Expression implements DataOrValueExp {
/** datatype object that actually validates text. */
public final Datatype dt;
public Datatype getType() { return dt; }
/**
* name of this datatype.
*
* The value of this field is not considered as significant.
* When two TypedStringExps share the same Datatype object,
* then they are unified even if they have different names.
*/
public final StringPair name;
public StringPair getName() { return name; }
/**
* 'except' clause of RELAX NG.
* If a token matches this pattern, then it should be rejected.
*/
public final Expression except;
protected DataExp( Datatype dt, StringPair typeName, Expression except ) {
super(dt.hashCode()+except.hashCode());
this.dt=dt;
this.name = typeName;
this.except = except;
}
protected final int calcHashCode() {
return dt.hashCode()+except.hashCode();
}
public boolean equals( Object o ) {
if (o == null) return false;
// Note that equals method of this class *can* be sloppy,
// since this class does not have a pattern as its child.
// Therefore datatype vocaburary does not necessarily provide
// strict equals method.
if(o.getClass()!=this.getClass()) return false;
DataExp rhs = (DataExp)o;
if( this.except != rhs.except ) return false;
return rhs.dt.equals(dt);
}
public Object visit( ExpressionVisitor visitor ) { return visitor.onData(this); }
public Expression visit( ExpressionVisitorExpression visitor ) { return visitor.onData(this); }
public boolean visit( ExpressionVisitorBoolean visitor ) { return visitor.onData(this); }
public void visit( ExpressionVisitorVoid visitor ) { visitor.onData(this); }
protected boolean calcEpsilonReducibility() {
XSDatatype xdt = (XSDatatype)dt;
if(except==Expression.nullSet && xdt.isAlwaysValid())
// because for such datatype we return STRING_IGNORE from StringCareLevelCalculator
return true;
return false;
}
// serialization support
private static final long serialVersionUID = 1;
}