- /*
- * The Apache Software License, Version 1.1
- *
- *
- * Copyright (c) 1999 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xalan" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation and was
- * originally based on software copyright (c) 1999, Lotus
- * Development Corporation., http://www.lotus.com. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- package org.apache.xpath.objects;
-
- import org.w3c.dom.*;
-
- /**
- * <meta name="usage" content="advanced"/>
- * This class represents an XPath boolean object, and is capable of
- * converting the boolean to other types, such as a string.
- */
- public class XBoolean extends XObject
- {
-
- /**
- * <meta name="usage" content="internal"/>
- * A true boolean object so we don't have to keep creating them.
- */
- public static XBoolean S_TRUE = new XBooleanStatic(true);
-
- /**
- * <meta name="usage" content="internal"/>
- * A true boolean object so we don't have to keep creating them.
- */
- public static XBoolean S_FALSE = new XBooleanStatic(false);
-
- /** Value of the object.
- * @serial */
- boolean m_val;
-
- /**
- * Construct a XBoolean object.
- *
- * @param b Value of the boolean object
- */
- public XBoolean(boolean b)
- {
-
- super();
-
- m_val = b;
- }
-
- /**
- * Construct a XBoolean object.
- *
- * @param b Value of the boolean object
- */
- public XBoolean(Boolean b)
- {
-
- super();
-
- m_val = b.booleanValue();
- m_obj = b;
- }
-
-
- /**
- * Tell that this is a CLASS_BOOLEAN.
- *
- * @return type of CLASS_BOOLEAN
- */
- public int getType()
- {
- return CLASS_BOOLEAN;
- }
-
- /**
- * Given a request type, return the equivalent string.
- * For diagnostic purposes.
- *
- * @return type string "#BOOLEAN"
- */
- public String getTypeString()
- {
- return "#BOOLEAN";
- }
-
- /**
- * Cast result object to a number.
- *
- * @return numeric value of the object value
- */
- public double num()
- {
- return m_val ? 1.0 : 0.0;
- }
-
- /**
- * Cast result object to a boolean.
- *
- * @return The object value as a boolean
- */
- public boolean bool()
- {
- return m_val;
- }
-
- /**
- * Cast result object to a string.
- *
- * @return The object's value as a string
- */
- public String str()
- {
- return m_val ? "true" : "false";
- }
-
- /**
- * Return a java object that's closest to the representation
- * that should be handed to an extension.
- *
- * @return The object's value as a java object
- */
- public Object object()
- {
- if(null == m_obj)
- m_obj = m_val ? S_TRUE : S_FALSE;
- return m_obj;
- }
-
- /**
- * Tell if two objects are functionally equal.
- *
- * @param obj2 Object to compare to this
- *
- * @return True if the two objects are equal
- *
- * @throws javax.xml.transform.TransformerException
- */
- public boolean equals(XObject obj2)
- {
-
- // In order to handle the 'all' semantics of
- // nodeset comparisons, we always call the
- // nodeset function.
- if (obj2.getType() == XObject.CLASS_NODESET)
- return obj2.equals(this);
-
- try
- {
- return m_val == obj2.bool();
- }
- catch(javax.xml.transform.TransformerException te)
- {
- throw new org.apache.xml.utils.WrappedRuntimeException(te);
- }
- }
-
- }