--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.xml.bind/share/classes/com/sun/tools/internal/xjc/model/Multiplicity.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,206 @@
+/*
+ * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.tools.internal.xjc.model;
+
+import java.math.BigInteger;
+
+
+
+/**
+ * represents a possible number of occurence.
+ *
+ * Usually, denoted by a pair of integers like (1,1) or (5,10).
+ * A special value "unbounded" is allowed as the upper bound.
+ *
+ * <p>
+ * For example, (0,unbounded) corresponds to the '*' occurence of DTD.
+ * (0,1) corresponds to the '?' occurence of DTD.
+ *
+ * @author
+ * <a href="mailto:kohsuke.kawaguchi@sun.com">Kohsuke KAWAGUCHI</a>
+ */
+public final class Multiplicity {
+ public final BigInteger min;
+ public final BigInteger max; // null is used to represent "unbounded".
+
+ public static Multiplicity create(BigInteger min, BigInteger max ) {
+ if (BigInteger.ZERO.equals(min) && max==null) return STAR;
+ if (BigInteger.ONE.equals(min) && max==null) return PLUS;
+ if (max!=null) {
+ if(BigInteger.ZERO.equals(min) && BigInteger.ZERO.equals(max)) return ZERO;
+ if(BigInteger.ZERO.equals(min) && BigInteger.ONE.equals(max)) return OPTIONAL;
+ if(BigInteger.ONE.equals(min) && BigInteger.ONE.equals(max)) return ONE;
+ }
+ return new Multiplicity(min, max);
+ }
+
+ public static Multiplicity create(int min, Integer max ) {
+ return Multiplicity.create(BigInteger.valueOf(min), BigInteger.valueOf(max.intValue()));
+ }
+
+ private Multiplicity(BigInteger min, BigInteger max) {
+ this.min = min;
+ this.max = max;
+ }
+
+ private Multiplicity(int min, int max) {
+ this(BigInteger.valueOf(min), BigInteger.valueOf(max));
+ }
+
+ private Multiplicity(int min, Integer max) {
+ this(BigInteger.valueOf(min), (max == null) ? null : BigInteger.valueOf(max));
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (!(o instanceof Multiplicity)) return false;
+
+ Multiplicity that = (Multiplicity) o;
+
+ if (!this.min.equals(that.min)) return false;
+ if (this.max != null ? !this.max.equals(that.max) : that.max != null) return false;
+
+ return true;
+ }
+
+ @Override
+ public int hashCode() {
+ return min.add(max).intValue();
+ }
+
+ /** returns true if the multiplicity is (1,1). */
+ public boolean isUnique() {
+ if(max==null) return false;
+ return BigInteger.ONE.equals(min) && BigInteger.ONE.equals(max);
+ }
+
+ /** returns true if the multiplicity is (0,1) */
+ public boolean isOptional() {
+ if(max==null) return false;
+ return BigInteger.ZERO.equals(min) && BigInteger.ONE.equals(max);
+ }
+
+ /** returns true if the multiplicity is (0,1) or (1,1). */
+ public boolean isAtMostOnce() {
+ if(max==null) return false;
+ return max.compareTo(BigInteger.ONE)<=0;
+ }
+
+ /** returns true if the multiplicity is (0,0). */
+ public boolean isZero() {
+ if(max==null) return false;
+ return BigInteger.ZERO.equals(max);
+ }
+
+ /**
+ * Returns true if the multiplicity represented by this object
+ * completely includes the multiplicity represented by the
+ * other object. For example, we say [1,3] includes [1,2] but
+ * [2,4] doesn't include [1,3].
+ */
+ public boolean includes( Multiplicity rhs ) {
+ if (rhs.min.compareTo(min) == -1) return false;
+ if (max==null) return true;
+ if (rhs.max==null) return false;
+ return rhs.max.compareTo(max) <= 0;
+ }
+
+ /**
+ * Returns the string representation of the 'max' property.
+ * Either a number or a token "unbounded".
+ */
+ public String getMaxString() {
+ if(max==null) return "unbounded";
+ else return max.toString();
+ }
+
+ /** gets the string representation.
+ * mainly debug purpose.
+ */
+ @Override
+ public String toString() {
+ return "("+min+','+getMaxString()+')';
+ }
+
+ /** the constant representing the (0,0) multiplicity. */
+ public static final Multiplicity ZERO = new Multiplicity(0,0);
+
+ /** the constant representing the (1,1) multiplicity. */
+ public static final Multiplicity ONE = new Multiplicity(1,1);
+
+ /** the constant representing the (0,1) multiplicity. */
+ public static final Multiplicity OPTIONAL = new Multiplicity(0,1);
+
+ /** the constant representing the (0,unbounded) multiplicity. */
+ public static final Multiplicity STAR = new Multiplicity(0,null);
+
+ /** the constant representing the (1,unbounded) multiplicity. */
+ public static final Multiplicity PLUS = new Multiplicity(1,null);
+
+// arithmetic methods
+ public static Multiplicity choice( Multiplicity lhs, Multiplicity rhs ) {
+ return create(
+ lhs.min.min(rhs.min),
+ (lhs.max==null || rhs.max==null) ? null : lhs.max.max(rhs.max) );
+ }
+ public static Multiplicity group( Multiplicity lhs, Multiplicity rhs ) {
+ return create(
+ lhs.min.add(rhs.min),
+ (lhs.max==null || rhs.max==null) ? null : lhs.max.add(rhs.max) );
+ }
+ public static Multiplicity multiply( Multiplicity lhs, Multiplicity rhs ) {
+ BigInteger min = lhs.min.multiply(rhs.min);
+ BigInteger max;
+ if (isZero(lhs.max) || isZero(rhs.max))
+ max = BigInteger.ZERO;
+ else
+ if (lhs.max==null || rhs.max==null)
+ max = null;
+ else
+ max = lhs.max.multiply(rhs.max);
+ return create(min,max);
+ }
+
+ private static boolean isZero(BigInteger i) {
+ return (i != null && BigInteger.ZERO.equals(i));
+ }
+
+ public static Multiplicity oneOrMore( Multiplicity c ) {
+ if(c.max==null) return c; // (x,*) => (x,*)
+ if(BigInteger.ZERO.equals(c.max)) return c; // (0,0) => (0,0)
+ else return create( c.min, null ); // (x,y) => (x,*)
+ }
+
+ public Multiplicity makeOptional() {
+ if (BigInteger.ZERO.equals(min)) return this;
+ return create(BigInteger.ZERO, max);
+ }
+
+ public Multiplicity makeRepeated() {
+ if (max==null || BigInteger.ZERO.equals(max)) return this; // (0,0)* = (0,0) and (n,unbounded)* = (n,unbounded)
+ return create(min,null);
+ }
+}