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AbstractUnitBox.java
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69 lines (59 loc) · 1.71 KB
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package soot;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 1997 - 1999 Raja Vallee-Rai
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>.
* #L%
*/
/**
* Reference implementation for UnitBox; just add a canContainUnit method.
*/
@SuppressWarnings("serial")
public abstract class AbstractUnitBox implements UnitBox {
protected Unit unit;
@Override
public boolean isBranchTarget() {
return true;
}
@Override
public void setUnit(Unit unit) {
if (!canContainUnit(unit)) {
throw new RuntimeException("attempting to put invalid unit in UnitBox");
}
// Remove this from set of back pointers.
if (this.unit != null) {
this.unit.removeBoxPointingToThis(this);
}
// Perform link
this.unit = unit;
// Add this to back pointers
if (this.unit != null) {
this.unit.addBoxPointingToThis(this);
}
}
@Override
public Unit getUnit() {
return unit;
}
@Override
public void toString(UnitPrinter up) {
up.startUnitBox(this);
up.unitRef(unit, isBranchTarget());
up.endUnitBox(this);
}
}