Mirror of the BLOAT repository
https://www.cs.purdue.edu/homes/hosking/bloat/
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134 lines
3.4 KiB
134 lines
3.4 KiB
/**
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* All files in the distribution of BLOAT (Bytecode Level Optimization and
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* Analysis tool for Java(tm)) are Copyright 1997-2001 by the Purdue
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* Research Foundation of Purdue University. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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package EDU.purdue.cs.bloat.editor;
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/**
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* LocalVariable represents a local variable index operand to various
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* instructions.
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*
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* @author Nate Nystrom (<a
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* href="mailto:nystrom@cs.purdue.edu">nystrom@cs.purdue.edu</a>)
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*/
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public class LocalVariable {
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private String name;
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private Type type;
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private int index;
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/**
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* Constructor.
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*
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* @param index
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* The index of the local variable in the method's local variable
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* array.
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*/
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public LocalVariable(final int index) {
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this.name = null;
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this.type = null;
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this.index = index;
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}
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/**
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* Constructor.
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*
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* @param name
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* The name of the local variable.
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* @param type
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* The descriptor (or index into the constant pool) representing
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* the variable type.
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* @param index
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* The index of the local variable in the method's local variable
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* array.
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*/
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public LocalVariable(final String name, final Type type, final int index) {
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this.name = name;
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this.type = type;
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this.index = index;
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}
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/**
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* Hash the local variable.
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*
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* A stricter hashing than using the index will break Hashtable lookups
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* since a variable could have a name assigned to it after its first use.
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*
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* @return The hash code.
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*/
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public int hashCode() {
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return index;
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}
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/**
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* Check if an object is equal to this variable.
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*
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* A stricter comparison than comparing indices will break Hashtable lookups
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* since a variable could have a name assigned to it after its first use.
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*
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* @param obj
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* The object to compare against.
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* @return true if equal, false if not.
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*/
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public boolean equals(final Object obj) {
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return (obj != null) && (obj instanceof LocalVariable)
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&& (((LocalVariable) obj).index == index);
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}
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/**
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* Get the name of the local variable.
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*
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* @return The name of the local variable.
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*/
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public String name() {
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return name;
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}
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/**
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* Get the type of the local variable.
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*
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* @return The type of the local variable.
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*/
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public Type type() {
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return type;
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}
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/**
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* Get the index into the local variable array.
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*
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* @return The index into the local variable array.
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*/
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public int index() {
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return index;
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}
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/**
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* Convert the variable to a string.
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*
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* @return A string representation of the variable.
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*/
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public String toString() {
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if (name == null) {
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return "Local$" + index;
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}
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return name + "$" + index;
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}
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}
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