com.sun.tools.xjc.util.Util Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.tools.xjc.util;
import org.xml.sax.Locator;
/**
* Other miscellaneous utility methods.
*
* @author
* Kohsuke Kawaguchi ([email protected])
*/
public final class Util {
private Util() {} // no instanciation please
/**
* An easier-to-use version of the System.getProperty method
* that doesn't throw an exception even if a property cannot be
* read.
*/
public static String getSystemProperty( String name ) {
try {
return System.getProperty(name);
} catch( SecurityException e ) {
return null;
}
}
/**
* Compares if two {@link Locator}s point to the exact same position.
*/
public static boolean equals(Locator lhs, Locator rhs) {
return lhs.getLineNumber()==rhs.getLineNumber()
&& lhs.getColumnNumber()==rhs.getColumnNumber()
&& equals(lhs.getSystemId(),rhs.getSystemId())
&& equals(lhs.getPublicId(),rhs.getPublicId());
}
private static boolean equals(String lhs, String rhs) {
if(lhs==null && rhs==null) return true;
if(lhs==null || rhs==null) return false;
return lhs.equals(rhs);
}
/**
* Calls the other getSystemProperty method with
* "[clazz].[name].
*/
public static String getSystemProperty( Class clazz, String name ) {
return getSystemProperty( clazz.getName()+'.'+name );
}
}