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Literal.java
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132 lines (116 loc) · 3.51 KB
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/*
* DynamicJava - Copyright (C) 1999-2001
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to permit
* persons to whom the Software is furnished to do so, subject to the
* following conditions:
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL DYADE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of Dyade shall not be
* used in advertising or otherwise to promote the sale, use or other
* dealings in this Software without prior written authorization from
* Dyade.
*
*/
package koala.dynamicjava.tree;
import koala.dynamicjava.tree.visitor.*;
/**
* This class represents the literal nodes of the syntax tree
*
* @author Stephane Hillion
* @version 1.0 - 1999/04/24
*/
public abstract class Literal extends PrimaryExpression {
/**
* The representation of the literal
*/
private String representation;
/**
* The value of this literal
*/
private Object value;
/**
* The type of this literal
*/
private Class<?> type;
/**
* Initializes a literal
* @param rep the representation of the literal
* @param val the value of this literal
* @param typ the type of this literal
* @exception IllegalArgumentException if rep is null
*/
protected Literal(String rep, Object val, Class<?> typ, SourceInfo si) {
super(si);
if (rep == null) throw new IllegalArgumentException("rep == null");
representation = rep;
value = val;
type = typ;
}
/**
* Returns the representation of this object
*/
public String getRepresentation() {
return representation;
}
/**
* Sets the representation of this object
* @exception IllegalArgumentException if s is null
*/
public void setRepresentation(String s) {
if (s == null) throw new IllegalArgumentException("s == null");
representation = s;
}
/**
* Returns the value of this expression
*/
public Object getValue() {
return value;
}
/**
* Sets the value of this object
* @exception IllegalArgumentException if o is null
*/
public void setValue(Object o) {
value = o;
}
/**
* Returns the type of this expression.
* NOTE: the 'null' literal has a null type
*/
public Class<?> getType() {
return type;
}
/**
* Sets the type of this object
*/
public void setType(Class<?> c) {
type = c;
}
/**
* Allows a visitor to traverse the tree
* @param visitor the visitor to accept
*/
public <T> T acceptVisitor(Visitor<T> visitor) {
return visitor.visit(this);
}
/**
* Implementation of toString for use in unit testing
*/
public String toString() {
return "("+getClass().getName()+": "+getRepresentation()+" "+getValue()+" "+getType()+")";
}
}