77 lines
2.6 KiB
Java
77 lines
2.6 KiB
Java
/*
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* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.tools.internal.xjc.util;
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import org.xml.sax.Locator;
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/**
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* Other miscellaneous utility methods.
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*
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* @author
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* Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
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*/
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public final class Util {
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private Util() {} // no instanciation please
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/**
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* An easier-to-use version of the System.getProperty method
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* that doesn't throw an exception even if a property cannot be
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* read.
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*/
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public static String getSystemProperty( String name ) {
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try {
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return System.getProperty(name);
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} catch( SecurityException e ) {
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return null;
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}
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}
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/**
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* Compares if two {@link Locator}s point to the exact same position.
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*/
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public static boolean equals(Locator lhs, Locator rhs) {
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return lhs.getLineNumber()==rhs.getLineNumber()
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&& lhs.getColumnNumber()==rhs.getColumnNumber()
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&& equals(lhs.getSystemId(),rhs.getSystemId())
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&& equals(lhs.getPublicId(),rhs.getPublicId());
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}
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private static boolean equals(String lhs, String rhs) {
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if(lhs==null && rhs==null) return true;
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if(lhs==null || rhs==null) return false;
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return lhs.equals(rhs);
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}
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/**
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* Calls the other getSystemProperty method with
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* "[clazz].[name].
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*/
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public static String getSystemProperty( Class clazz, String name ) {
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return getSystemProperty( clazz.getName()+'.'+name );
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}
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}
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