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Diffstat (limited to 'libjava/classpath/gnu/xml/xpath/EqualityExpr.java')
| -rw-r--r-- | libjava/classpath/gnu/xml/xpath/EqualityExpr.java | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/libjava/classpath/gnu/xml/xpath/EqualityExpr.java b/libjava/classpath/gnu/xml/xpath/EqualityExpr.java deleted file mode 100644 index 133e1ff..0000000 --- a/libjava/classpath/gnu/xml/xpath/EqualityExpr.java +++ /dev/null @@ -1,274 +0,0 @@ -/* EqualityExpr.java -- - Copyright (C) 2004 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath 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 for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - -package gnu.xml.xpath; - -import java.util.Collection; -import java.util.Iterator; -import javax.xml.namespace.QName; -import org.w3c.dom.Node; - -/** - * Boolean equality expression. - * - * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> - */ -final class EqualityExpr - extends Expr -{ - - final Expr lhs; - final Expr rhs; - final boolean invert; - - EqualityExpr(Expr lhs, Expr rhs, boolean invert) - { - this.lhs = lhs; - this.rhs = rhs; - this.invert = invert; - } - - @Override - public Object evaluate(Node context, int pos, int len) - { - boolean val = evaluateImpl(context, pos, len); - if (invert) - { - return val ? Boolean.FALSE : Boolean.TRUE; - } - else - { - return val ? Boolean.TRUE : Boolean.FALSE; - } - } - - private boolean evaluateImpl(Node context, int pos, int len) - { - Object left = lhs.evaluate(context, pos, len); - Object right = rhs.evaluate(context, pos, len); - - /* - * If both objects to be compared are node-sets, then the comparison - * will be true if and only if there is a node in the first node-set and - * a node in the second node-set such that the result of performing the - * comparison on the string-values of the two nodes is true. - */ - boolean flns = left instanceof Collection; - boolean frns = right instanceof Collection; - if (flns && frns) - { - /* Suppression is safe, as we know context produces Collection<Node> */ - @SuppressWarnings("unchecked") - Collection<Node> lns = (Collection<Node>) left; - @SuppressWarnings("unchecked") - Collection<Node> rns = (Collection<Node>) right; - if (lns.isEmpty()) - { - return false; - } - boolean all = true; - for (Node ltest : lns) - { - for (Node rtest : rns) - { - if (ltest == rtest || ltest.equals(rtest)) - { - // much shorter - if (!invert) - { - return true; - } - } - else if (stringValue(ltest).equals(stringValue(rtest))) - { - if (!invert) - { - return true; - } - } - else - { - all = false; - } - } - } - return all; - } - /* - * If one object to be compared is a node-set and the other is a number, - * then the comparison will be true if and only if there is a node in - * the node-set such that the result of performing the comparison on the - * number to be compared and on the result of converting the - * string-value of that node to a number using the number function is - * true. - */ - boolean fln = left instanceof Double; - boolean frn = right instanceof Double; - if ((flns && frn) || (frns && fln)) - { - /* Suppression is safe, as we know context produces Collection<Node> */ - @SuppressWarnings("unchecked") - Collection<Node> ns = flns ? (Collection<Node>) left : (Collection<Node>) right; - double n = fln ? ((Double) left).doubleValue() : - ((Double) right).doubleValue(); - boolean all = true; - for (Node test : ns) - { - double nn = _number(context, stringValue(test)); - if (nn == n) - { - if (!invert) - { - return true; - } - } - else - { - all = false; - } - } - return invert ? all : false; - } - /* - * If one object to be compared is a node-set and the other is a - * string, then the comparison will be true if and only if there is a - * node in the node-set such that the result of performing the - * comparison on the string-value of the node and the other string is - * true. - */ - boolean fls = left instanceof String; - boolean frs = right instanceof String; - if ((flns && frs) || (frns && fls)) - { - /* Suppression is safe, as we know context produces Collection<Node> */ - @SuppressWarnings("unchecked") - Collection<Node> ns = flns ? (Collection<Node>) left : (Collection<Node>) right; - String s = fls ? (String) left : (String) right; - boolean all = true; - for (Node test : ns) - { - if (stringValue(test).equals(s)) - { - if (!invert) - { - return true; - } - } - else - { - all = false; - } - } - return invert ? all : false; - } - /* - * If one object to be compared is a node-set and the other is a - * boolean, then the comparison will be true if and only if the result - * of performing the comparison on the boolean and on the result of - * converting the node-set to a boolean using the boolean function is - * true. - */ - boolean flb = left instanceof Boolean; - boolean frb = right instanceof Boolean; - if ((flns && frb) || (frns && flb)) - { - /* Suppression is safe, as we know context produces Collection<Node> */ - @SuppressWarnings("unchecked") - Collection<Node> ns = flns ? (Collection<Node>) left : (Collection<Node>) right; - boolean b = flb ? ((Boolean) left).booleanValue() : - ((Boolean) right).booleanValue(); - return _boolean(context, ns) == b; - } - /* - * If at least one object to be compared is a boolean, then each object - * to be compared is converted to a boolean as if by applying the - * boolean function. - */ - if (flb || frb) - { - boolean lb = flb ? ((Boolean) left).booleanValue() : - _boolean(context, left); - boolean rb = frb ? ((Boolean) right).booleanValue() : - _boolean(context, right); - return lb == rb; - } - /* - * Otherwise, if at least one object to be compared is - * a number, then each object to be compared is converted to a number as - * if by applying the number function. - */ - if (fln || frn) - { - double ln = fln ? ((Double) left).doubleValue() : - _number(context, left); - double rn = frn ? ((Double) right).doubleValue() : - _number(context, right); - return ln == rn; - } - /* - * Otherwise, both objects to be - * compared are converted to strings as if by applying the string - * function. - */ - String ls = fls ? (String) left : _string(context, left); - String rs = frs ? (String) right : _string(context, right); - return ls.equals(rs); - } - - public Expr clone(Object context) - { - return new EqualityExpr(lhs.clone(context), rhs.clone(context), invert); - } - - public boolean references(QName var) - { - return (lhs.references(var) || rhs.references(var)); - } - - public String toString() - { - if (invert) - { - return lhs + " != " + rhs; - } - else - { - return lhs + " = " + rhs; - } - } - -} |