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CookCC - a Lexer / Parser (LALR(1)) Project
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.xerces.impl.xs;
import org.apache.xerces.impl.xs.util.XSObjectListImpl;
import org.apache.xerces.xs.XSConstants;
import org.apache.xerces.xs.XSNamespaceItem;
import org.apache.xerces.xs.XSObjectList;
import org.apache.xerces.xs.XSParticle;
import org.apache.xerces.xs.XSTerm;
/**
* Store schema particle declaration.
*
* @xerces.internal
*
* @author Sandy Gao, IBM
*
* @version $Id: XSParticleDecl.java 965250 2010-07-18 16:04:58Z mrglavas $
*/
public class XSParticleDecl implements XSParticle {
// types of particles
public static final short PARTICLE_EMPTY = 0;
public static final short PARTICLE_ELEMENT = 1;
public static final short PARTICLE_WILDCARD = 2;
public static final short PARTICLE_MODELGROUP = 3;
public static final short PARTICLE_ZERO_OR_MORE = 4;
public static final short PARTICLE_ZERO_OR_ONE = 5;
public static final short PARTICLE_ONE_OR_MORE = 6;
// type of the particle
public short fType = PARTICLE_EMPTY;
// term of the particle
// for PARTICLE_ELEMENT : the element decl
// for PARTICLE_WILDCARD: the wildcard decl
// for PARTICLE_MODELGROUP: the model group
public XSTerm fValue = null;
// minimum occurrence of this particle
public int fMinOccurs = 1;
// maximum occurrence of this particle
public int fMaxOccurs = 1;
// optional annotation
public XSObjectList fAnnotations = null;
// clone this decl
public XSParticleDecl makeClone() {
XSParticleDecl particle = new XSParticleDecl();
particle.fType = fType;
particle.fMinOccurs = fMinOccurs;
particle.fMaxOccurs = fMaxOccurs;
particle.fDescription = fDescription;
particle.fValue = fValue;
particle.fAnnotations = fAnnotations;
return particle;
}
/**
* 3.9.6 Schema Component Constraint: Particle Emptiable
* whether this particle is emptible
*/
public boolean emptiable() {
return minEffectiveTotalRange() == 0;
}
// whether this particle contains nothing
public boolean isEmpty() {
if (fType == PARTICLE_EMPTY)
return true;
if (fType == PARTICLE_ELEMENT || fType == PARTICLE_WILDCARD)
return false;
return ((XSModelGroupImpl)fValue).isEmpty();
}
/**
* 3.8.6 Effective Total Range (all and sequence) and
* Effective Total Range (choice)
* The following methods are used to return min/max range for a particle.
* They are not exactly the same as it's described in the spec, but all the
* values from the spec are retrievable by these methods.
*/
public int minEffectiveTotalRange() {
if (fType == XSParticleDecl.PARTICLE_EMPTY) {
return 0;
}
if (fType == PARTICLE_MODELGROUP) {
return ((XSModelGroupImpl)fValue).minEffectiveTotalRange() * fMinOccurs;
}
return fMinOccurs;
}
public int maxEffectiveTotalRange() {
if (fType == XSParticleDecl.PARTICLE_EMPTY) {
return 0;
}
if (fType == PARTICLE_MODELGROUP) {
int max = ((XSModelGroupImpl)fValue).maxEffectiveTotalRange();
if (max == SchemaSymbols.OCCURRENCE_UNBOUNDED)
return SchemaSymbols.OCCURRENCE_UNBOUNDED;
if (max != 0 && fMaxOccurs == SchemaSymbols.OCCURRENCE_UNBOUNDED)
return SchemaSymbols.OCCURRENCE_UNBOUNDED;
return max * fMaxOccurs;
}
return fMaxOccurs;
}
/**
* get the string description of this particle
*/
private String fDescription = null;
public String toString() {
if (fDescription == null) {
StringBuffer buffer = new StringBuffer();
appendParticle(buffer);
if (!(fMinOccurs == 0 && fMaxOccurs == 0 ||
fMinOccurs == 1 && fMaxOccurs == 1)) {
buffer.append('{').append(fMinOccurs);
if (fMaxOccurs == SchemaSymbols.OCCURRENCE_UNBOUNDED)
buffer.append("-UNBOUNDED");
else if (fMinOccurs != fMaxOccurs)
buffer.append('-').append(fMaxOccurs);
buffer.append('}');
}
fDescription = buffer.toString();
}
return fDescription;
}
/**
* append the string description of this particle to the string buffer
* this is for error message.
*/
void appendParticle(StringBuffer buffer) {
switch (fType) {
case PARTICLE_EMPTY:
buffer.append("EMPTY");
break;
case PARTICLE_ELEMENT:
buffer.append(fValue.toString());
break;
case PARTICLE_WILDCARD:
buffer.append('(');
buffer.append(fValue.toString());
buffer.append(')');
break;
case PARTICLE_MODELGROUP:
buffer.append(fValue.toString());
break;
}
}
public void reset(){
fType = PARTICLE_EMPTY;
fValue = null;
fMinOccurs = 1;
fMaxOccurs = 1;
fDescription = null;
fAnnotations = null;
}
/**
* Get the type of the object, i.e ELEMENT_DECLARATION.
*/
public short getType() {
return XSConstants.PARTICLE;
}
/**
* The name of this XSObject depending on the
* XSObject type.
*/
public String getName() {
return null;
}
/**
* The namespace URI of this node, or null if it is
* unspecified. defines how a namespace URI is attached to schema
* components.
*/
public String getNamespace() {
return null;
}
/**
* {min occurs} determines the minimum number of terms that can occur.
*/
public int getMinOccurs() {
return fMinOccurs;
}
/**
* {max occurs} whether the maxOccurs value is unbounded.
*/
public boolean getMaxOccursUnbounded() {
return fMaxOccurs == SchemaSymbols.OCCURRENCE_UNBOUNDED;
}
/**
* {max occurs} determines the maximum number of terms that can occur.
*/
public int getMaxOccurs() {
return fMaxOccurs;
}
/**
* {term} One of a model group, a wildcard, or an element declaration.
*/
public XSTerm getTerm() {
return fValue;
}
/**
* @see org.apache.xerces.xs.XSObject#getNamespaceItem()
*/
public XSNamespaceItem getNamespaceItem() {
return null;
}
/**
* Optional. Annotations.
*/
public XSObjectList getAnnotations() {
return (fAnnotations != null) ? fAnnotations : XSObjectListImpl.EMPTY_LIST;
}
} // class XSParticleDecl