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/*
* Fernflower - The Analytical Java Decompiler
* http://www.reversed-java.com
*
* (C) 2008 - 2010, Stiver
*
* This software is NEITHER public domain NOR free software
* as per GNU License. See license.txt for more details.
*
* This software is distributed WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE.
*/
package de.fernflower.modules.decompiler.exps;
import java.util.ArrayList;
import java.util.List;
import de.fernflower.code.CodeConstants;
import de.fernflower.main.DecompilerContext;
import de.fernflower.main.ClassesProcessor.ClassNode;
import de.fernflower.main.rels.MethodWrapper;
import de.fernflower.modules.decompiler.ExprProcessor;
import de.fernflower.modules.decompiler.vars.CheckTypesResult;
import de.fernflower.struct.attr.StructExceptionsAttribute;
import de.fernflower.struct.gen.VarType;
import de.fernflower.util.InterpreterUtil;
public class ExitExprent extends Exprent {
public static final int EXIT_RETURN = 0;
public static final int EXIT_THROW = 1;
// return or throw statement
private int exittype;
private Exprent value;
private VarType rettype;
{
this.type = EXPRENT_EXIT;
}
public ExitExprent(int exittype, Exprent value, VarType rettype) {
this.exittype = exittype;
this.value = value;
this.rettype = rettype;
}
public Exprent copy() {
return new ExitExprent(exittype, value==null?null:value.copy(), rettype);
}
public CheckTypesResult checkExprTypeBounds() {
CheckTypesResult result = new CheckTypesResult();
if(exittype == EXIT_RETURN && rettype.type!=CodeConstants.TYPE_VOID) {
result.addMinTypeExprent(value, VarType.getMinTypeInFamily(rettype.type_family));
result.addMaxTypeExprent(value, rettype);
}
return result;
}
public List<Exprent> getAllExprents() {
List<Exprent> lst = new ArrayList<Exprent>();
if(value != null) {
lst.add(value);
}
return lst;
}
public String toJava(int indent) {
if(exittype == EXIT_RETURN) {
StringBuilder buffer = new StringBuilder();
if(rettype.type!=CodeConstants.TYPE_VOID) {
buffer.append(" ");
ExprProcessor.getCastedExprent(value, rettype, buffer, indent, false);
}
return "return"+buffer.toString();
} else {
MethodWrapper meth = (MethodWrapper)DecompilerContext.getProperty(DecompilerContext.CURRENT_METHOD_WRAPPER);
ClassNode node = ((ClassNode)DecompilerContext.getProperty(DecompilerContext.CURRENT_CLASSNODE));
if(meth != null && node != null) {
StructExceptionsAttribute attr = (StructExceptionsAttribute)meth.methodStruct.getAttributes().getWithKey("Exceptions");
if(attr != null) {
String classname = null;
for(int i=0;i<attr.getThrowsExceptions().size();i++) {
String excclassname = attr.getExcClassname(i, node.classStruct.getPool());
if("java/lang/Throwable".equals(excclassname)) {
classname = excclassname;
break;
} else if("java/lang/Exception".equals(excclassname)) {
classname = excclassname;
}
}
if(classname != null) {
VarType exctype = new VarType(classname, true);
StringBuilder buffer = new StringBuilder();
ExprProcessor.getCastedExprent(value, exctype, buffer, indent, false);
return "throw "+buffer.toString();
}
}
}
return "throw "+value.toJava(indent);
}
}
public boolean equals(Object o) {
if(o == this) return true;
if(o == null || !(o instanceof ExitExprent)) return false;
ExitExprent et = (ExitExprent)o;
return exittype==et.getExittype() &&
InterpreterUtil.equalObjects(value, et.getValue());
}
public void replaceExprent(Exprent oldexpr, Exprent newexpr) {
if(oldexpr == value) {
value = newexpr;
}
}
public int getExittype() {
return exittype;
}
public Exprent getValue() {
return value;
}
public VarType getRettype() {
return rettype;
}
}
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