com.sun.org.apache.xml.internal.serializer.utils.BoolStack Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of org.apache.servicemix.bundles.jaxp-ri
Show all versions of org.apache.servicemix.bundles.jaxp-ri
This OSGi bundle wraps ${pkgArtifactId} ${pkgVersion} jar file.
The newest version!
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* $Id: BoolStack.java,v 1.7 2010-11-01 04:34:50 joehw Exp $
*/
package com.sun.org.apache.xml.internal.serializer.utils;
/**
* Simple stack for boolean values.
*
* This class is a copy of the one in com.sun.org.apache.xml.internal.utils.
* It exists to cut the serializers dependancy on that package.
* A minor changes from that package are:
* doesn't implement Clonable
*
* This class is not a public API, it is only public because it is
* used in com.sun.org.apache.xml.internal.serializer.
*
* @xsl.usage internal
*/
public final class BoolStack
{
/** Array of boolean values */
private boolean m_values[];
/** Array size allocated */
private int m_allocatedSize;
/** Index into the array of booleans */
private int m_index;
/**
* Default constructor. Note that the default
* block size is very small, for small lists.
*/
public BoolStack()
{
this(32);
}
/**
* Construct a IntVector, using the given block size.
*
* @param size array size to allocate
*/
public BoolStack(int size)
{
m_allocatedSize = size;
m_values = new boolean[size];
m_index = -1;
}
/**
* Get the length of the list.
*
* @return Current length of the list
*/
public final int size()
{
return m_index + 1;
}
/**
* Clears the stack.
*
*/
public final void clear()
{
m_index = -1;
}
/**
* Pushes an item onto the top of this stack.
*
*
* @param val the boolean to be pushed onto this stack.
* @return the item
argument.
*/
public final boolean push(boolean val)
{
if (m_index == m_allocatedSize - 1)
grow();
return (m_values[++m_index] = val);
}
/**
* Removes the object at the top of this stack and returns that
* object as the value of this function.
*
* @return The object at the top of this stack.
* @throws EmptyStackException if this stack is empty.
*/
public final boolean pop()
{
return m_values[m_index--];
}
/**
* Removes the object at the top of this stack and returns the
* next object at the top as the value of this function.
*
*
* @return Next object to the top or false if none there
*/
public final boolean popAndTop()
{
m_index--;
return (m_index >= 0) ? m_values[m_index] : false;
}
/**
* Set the item at the top of this stack
*
*
* @param b Object to set at the top of this stack
*/
public final void setTop(boolean b)
{
m_values[m_index] = b;
}
/**
* Looks at the object at the top of this stack without removing it
* from the stack.
*
* @return the object at the top of this stack.
* @throws EmptyStackException if this stack is empty.
*/
public final boolean peek()
{
return m_values[m_index];
}
/**
* Looks at the object at the top of this stack without removing it
* from the stack. If the stack is empty, it returns false.
*
* @return the object at the top of this stack.
*/
public final boolean peekOrFalse()
{
return (m_index > -1) ? m_values[m_index] : false;
}
/**
* Looks at the object at the top of this stack without removing it
* from the stack. If the stack is empty, it returns true.
*
* @return the object at the top of this stack.
*/
public final boolean peekOrTrue()
{
return (m_index > -1) ? m_values[m_index] : true;
}
/**
* Tests if this stack is empty.
*
* @return true
if this stack is empty;
* false
otherwise.
*/
public boolean isEmpty()
{
return (m_index == -1);
}
/**
* Grows the size of the stack
*
*/
private void grow()
{
m_allocatedSize *= 2;
boolean newVector[] = new boolean[m_allocatedSize];
System.arraycopy(m_values, 0, newVector, 0, m_index + 1);
m_values = newVector;
}
}