// Transmogrify License
//
// Copyright (c) 2001, ThoughtWorks, Inc.
// All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// - Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// - 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.
// Neither the name of the ThoughtWorks, Inc. nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS 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 COPYRIGHT OWNER OR
// 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.
package com.puppycrawl.tools.checkstyle.checks.usage.transmogrify;
import java.io.File;
/**
* represents a place where a definition is used. There are two flavors
* of references -- resolved (those that have a definition associated with
* them) and unresolved (those that don't have a definition associated).
* The goal of the resolution step is to get all of the references in the
* symbol table to fall into the resolved category.
*/
public class Reference implements Comparable {
private SymTabAST _node;
private Occurrence _occurrence;
public Reference( SymTabAST node ) {
_node = node;
_occurrence = new Occurrence( _node.getFile(), ASTUtil.getLine(_node), ASTUtil.getColumn(_node) );
}
/**
* gets the definition associated with this reference
*
* @return Definition the (possibly null) definition associated with
* this reference
*/
public IDefinition getDefinition() {
return _node.getDefinition();
}
/**
* return the node that was passed in during ctor
*/
public SymTabAST getTreeNode() {
return _node;
}
/**
* gets the occurrence of this reference
*
* @return Occurrence
*/
public Occurrence getOccurrence() {
return _occurrence;
}
/**
* gets the line where the node resides
*/
public int getLine() {
return getOccurrence().getLine();
}
/**
* gets the column for where the node resides
*/
public int getColumn() {
return getOccurrence().getColumn();
}
/**
* gets the enclosing file for the node
*/
public File getFile() {
return getOccurrence().getFile();
}
/**
* gets the name of the reference
*
* @return String the name of the definition associated with this reference
* if this reference is resolved, else null
*/
public String getName() {
return _node.getName();
}
/**
* returns a string representation of the reference.
*
* @return String
*/
public String toString() {
return getOccurrence().toString();
}
/**
* returns whether the <code>Reference</code>s are equal
*
* @return whether the <code>Reference</code>s are equal
*/
// REDTAG -- not finished
public boolean equals(Object obj){
boolean result = false;
if (obj instanceof Reference) {
result = getOccurrence().equals(((Reference)obj).getOccurrence());
}
return result;
}
public int compareTo(Object o) {
if (!(o instanceof Reference)) {
throw new ClassCastException(getClass().getName());
}
return getOccurrence().compareTo(((Reference)o).getOccurrence());
}
}