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/*
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* JBind
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*
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* Copyright (c) by Stefan Wachter. All rights reserved.
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*
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* Usage, modification, and redistribution is subject to license terms that are
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* available at 'http://www.jbind.org'. The JBind license is like the
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* 'Apache Software License V 1.1'.
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*/
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package org.jbind.xml.schema.cmp;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Set;
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import org.jbind.xml.base.IRef;
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import org.jbind.xml.base.ProcessContentsType;
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import org.jbind.xml.core.cmp.IWildcard;
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import org.jbind.xml.core.content.IDataRefOrDecl;
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public class Wildcard implements IWildcard {
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private boolean myIsNegative;
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/**
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* <i>(required)</i>. Contains namespace strings.
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*/
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private Set myNamespaces = new HashSet(17);
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private ProcessContentsType myProcessContentsType = null;
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public Wildcard(boolean anIsNegative, Set aNamespaces, ProcessContentsType aProcessContentsType) {
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myIsNegative = anIsNegative;
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myNamespaces = aNamespaces;
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myProcessContentsType = aProcessContentsType;
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}
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public boolean getIsNegative() {
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return myIsNegative;
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}
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public Set getNamespaces() {
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return myNamespaces;
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}
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public ProcessContentsType getProcessContentsType() {
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return myProcessContentsType;
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}
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public boolean isAllowed(IDataRefOrDecl aDecl) {
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return isAllowed(aDecl.getGlobalRef());
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}
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public boolean isAllowed(IRef aRef) {
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return isAllowed(aRef.getNamespace());
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}
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public boolean isAllowed(String aNamespace) {
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boolean contains = myNamespaces.contains(aNamespace);
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return myIsNegative ? !contains : contains;
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}
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private Set intersect(Set aSet1, Set aSet2) {
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Set res = new HashSet(17);
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res.addAll(aSet1);
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res.retainAll(aSet2);
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return res;
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}
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private Set subtract(Set aSet1, Set aSet2) {
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Set res = new HashSet(17);
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res.addAll(aSet1);
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res.removeAll(aSet2);
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return res;
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}
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private Set union(Set aSet1, Set aSet2) {
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Set res = new HashSet(17);
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res.addAll(aSet1);
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res.addAll(aSet2);
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return res;
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}
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public IWildcard union(IWildcard aWildcard, ProcessContentsType aProcessContentsType) {
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Set newSet = null;
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boolean negative = true;
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if (myIsNegative) {
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if (aWildcard.getIsNegative()) {
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// both wildcards are negative
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newSet = intersect(myNamespaces, aWildcard.getNamespaces());
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} else {
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// this wildcard is negative and the other is positive
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newSet = subtract(myNamespaces, aWildcard.getNamespaces());
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}
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} else {
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if (aWildcard.getIsNegative()) {
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// this wildcard is positive and the other one is negative
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newSet = subtract(aWildcard.getNamespaces(), myNamespaces);
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} else {
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// both wildcards are positive
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newSet = union(myNamespaces, aWildcard.getNamespaces());
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negative = false;
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}
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}
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return new Wildcard(negative, newSet, aProcessContentsType);
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}
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public IWildcard negate() {
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return new Wildcard(!myIsNegative, myNamespaces, myProcessContentsType);
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}
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public IWildcard intersect(IWildcard aWildcard, ProcessContentsType aProcessContentsType) {
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return negate().union(aWildcard.negate(), aProcessContentsType).negate();
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}
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public boolean isSubset(IWildcard aWildcard) {
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IWildcard i = intersect(aWildcard, null);
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return equals(i);
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}
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public boolean equals(IWildcard aWildcard) {
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boolean res = myIsNegative == aWildcard.getIsNegative();
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if (res) {
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for (Iterator i = myNamespaces.iterator(); res && i.hasNext(); ) {
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Object n = i.next();
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res = aWildcard.getNamespaces().contains(n);
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}
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for (Iterator i = aWildcard.getNamespaces().iterator();
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res && i.hasNext(); ) {
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Object n = i.next();
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res = myNamespaces.contains(n);
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}
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}
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return res;
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}
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}
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