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package com.sun.org.apache.xerces.internal.impl.dtd.models;

import com.sun.org.apache.xerces.internal.impl.dtd.XMLContentSpec;

Content model Uni-Op node.
@xerces.internal
/** * Content model Uni-Op node. * * @xerces.internal * */
public class CMUniOp extends CMNode { // ------------------------------------------------------------------- // Constructors // ------------------------------------------------------------------- public CMUniOp(int type, CMNode childNode) { super(type); // Insure that its one of the types we require if ((type() != XMLContentSpec.CONTENTSPECNODE_ZERO_OR_ONE) && (type() != XMLContentSpec.CONTENTSPECNODE_ZERO_OR_MORE) && (type() != XMLContentSpec.CONTENTSPECNODE_ONE_OR_MORE)) { throw new RuntimeException("ImplementationMessages.VAL_UST"); } // Store the node and init any data that needs it fChild = childNode; } // ------------------------------------------------------------------- // Package, final methods // ------------------------------------------------------------------- final CMNode getChild() { return fChild; } // ------------------------------------------------------------------- // Package, inherited methods // ------------------------------------------------------------------- public boolean isNullable() { // // For debugging purposes, make sure we got rid of all non '*' // repetitions. Otherwise, '*' style nodes are always nullable. // if (type() == XMLContentSpec.CONTENTSPECNODE_ONE_OR_MORE) return fChild.isNullable(); else return true; } // ------------------------------------------------------------------- // Protected, inherited methods // ------------------------------------------------------------------- protected void calcFirstPos(CMStateSet toSet) { // Its just based on our child node's first pos toSet.setTo(fChild.firstPos()); } protected void calcLastPos(CMStateSet toSet) { // Its just based on our child node's last pos toSet.setTo(fChild.lastPos()); } // ------------------------------------------------------------------- // Private data members // // fChild // This is the reference to the one child that we have for this // unary operation. // ------------------------------------------------------------------- private CMNode fChild; };