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61 lines
2.4 KiB
61 lines
2.4 KiB
/*
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* CreateNewConstructor (c) 1998 Jochen Hoenicke
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*
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* You may distribute under the terms of the GNU General Public License.
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*
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* IN NO EVENT SHALL JOCHEN HOENICKE BE LIABLE TO ANY PARTY FOR DIRECT,
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* INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
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* THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF JOCHEN HOENICKE
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* HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* JOCHEN HOENICKE SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
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* BASIS, AND JOCHEN HOENICKE HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
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* SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* $Id$
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*/
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package jode;
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public class CreateNewConstructor implements Transformation{
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public InstructionHeader transform(InstructionHeader ih) {
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InvokeOperator constrCall;
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Expression exprs[];
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try {
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constrCall = (InvokeOperator) ih.getInstruction();
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if (!constrCall.isConstructor())
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return null;
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int params = constrCall.getOperandCount();
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exprs = new Expression[params];
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for (int i = params-1; i>0; i--) {
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ih = ih.getSimpleUniquePredecessor();
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exprs[i] = (Expression) ih.getInstruction();
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if (exprs[i].isVoid())
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return null; /* XXX */
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}
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ih = ih.getSimpleUniquePredecessor();
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DupOperator dup = (DupOperator) ih.getInstruction();
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if (dup.getCount() != 1 && dup.getDepth() != 0)
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return null;
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ih = ih.getSimpleUniquePredecessor();
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exprs[0] = (Expression) ih.getInstruction();
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if (exprs[0].isVoid())
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return null;
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NewOperator op = (NewOperator) exprs[0].getOperator();
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if (constrCall.getClassType() != op.getType())
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return null;
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} catch (ClassCastException ex) {
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return null;
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} catch (NullPointerException ex) {
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return null;
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}
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ConstructorOperator conOp =
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new ConstructorOperator(constrCall.getClassType(),
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constrCall.getField());
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return ih.combine(exprs.length+2, new Expression(conOp, exprs));
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}
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}
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