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/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 1999-2007 Shigeru Chiba. All Rights Reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. Alternatively, the contents of this file may be used under
* the terms of the GNU Lesser General Public License Version 2.1 or later.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
package javassist.compiler.ast;
import javassist.compiler.TokenId;
import javassist.compiler.CompileError;
/**
* Variable declarator.
*/
public class Declarator extends ASTList implements TokenId {
protected int varType;
protected int arrayDim;
protected int localVar;
protected String qualifiedClass; // JVM-internal representation
public Declarator(int type, int dim) {
super(null);
varType = type;
arrayDim = dim;
localVar = -1;
qualifiedClass = null;
}
public Declarator(ASTList className, int dim) {
super(null);
varType = CLASS;
arrayDim = dim;
localVar = -1;
qualifiedClass = astToClassName(className, '/');
}
/* For declaring a pre-defined? local variable.
*/
public Declarator(int type, String jvmClassName, int dim,
int var, Symbol sym) {
super(null);
varType = type;
arrayDim = dim;
localVar = var;
qualifiedClass = jvmClassName;
setLeft(sym);
append(this, null); // initializer
}
public Declarator make(Symbol sym, int dim, ASTree init) {
Declarator d = new Declarator(this.varType, this.arrayDim + dim);
d.qualifiedClass = this.qualifiedClass;
d.setLeft(sym);
append(d, init);
return d;
}
/* Returns CLASS, BOOLEAN, BYTE, CHAR, SHORT, INT, LONG, FLOAT,
* or DOUBLE (or VOID)
*/
public int getType() { return varType; }
public int getArrayDim() { return arrayDim; }
public void addArrayDim(int d) { arrayDim += d; }
public String getClassName() { return qualifiedClass; }
public void setClassName(String s) { qualifiedClass = s; }
public Symbol getVariable() { return (Symbol)getLeft(); }
public void setVariable(Symbol sym) { setLeft(sym); }
public ASTree getInitializer() {
ASTList t = tail();
if (t != null)
return t.head();
else
return null;
}
public void setLocalVar(int n) { localVar = n; }
public int getLocalVar() { return localVar; }
public String getTag() { return "decl"; }
public void accept(Visitor v) throws CompileError {
v.atDeclarator(this);
}
public static String astToClassName(ASTList name, char sep) {
if (name == null)
return null;
StringBuffer sbuf = new StringBuffer();
astToClassName(sbuf, name, sep);
return sbuf.toString();
}
private static void astToClassName(StringBuffer sbuf, ASTList name,
char sep) {
for (;;) {
ASTree h = name.head();
if (h instanceof Symbol)
sbuf.append(((Symbol)h).get());
else if (h instanceof ASTList)
astToClassName(sbuf, (ASTList)h, sep);
name = name.tail();
if (name == null)
break;
sbuf.append(sep);
}
}
}
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