/**
* Applies the <b>(VAL)</b> rule to the <code>pNode</code> using the <code>pContext</code>.
*
* @param pContext The big step proof pContext.
* @param pNode The node to apply the <b>(VAL)</b> rule to.
*/
@Override
public void applyValue(BigStepProofContext pContext, BigStepProofNode pNode) {
if ((!pNode.getExpression().isValue()) || (pNode.getExpression() instanceof Row)) {
throw new IllegalArgumentException("Can not apply VAL"); // $NON-NLS-1$
}
pContext.setProofNodeResult(pNode, pNode.getExpression());
}
/**
* Applies the <b>(OMEGA)</b> rule to the <code>pNode</code> using the <code>pContext</code>.
*
* @param pContext The big step proof pContext.
* @param pNode The node to apply the <b>(OMEGA)</b> rule to.
*/
public void applyOmega(BigStepProofContext pContext, BigStepProofNode pNode) {
Row row = (Row) pNode.getExpression();
if (!row.isValue()) {
throw new IllegalArgumentException("Can not apply OMEGA"); // $NON-NLS-1$
}
pContext.setProofNodeResult(pNode, row);
}
/**
* Updates the <code>node</code> to which <b>(OBJECT)</b> was applied previously.
*
* @param pContext The big step proof context.
* @param pNode The node to update according to <b>(OBJECT)</b>.
*/
public void updateObject(BigStepProofContext pContext, BigStepProofNode pNode) {
if ((pNode.getChildCount() == 1) && (pNode.getChildAt(0).isProven())) {
ObjectExpr oldObjectExpr = (ObjectExpr) pNode.getExpression();
Row row = (Row) pNode.getChildAt(0).getResult().getValue();
pContext.setProofNodeResult(
pNode, new ObjectExpr(oldObjectExpr.getId(), oldObjectExpr.getTau(), row));
}
}
/**
* Updates the <code>node</code> to which <b>(METHOD)</b> was applied previously.
*
* @param pContext The big step proof context.
* @param pNode The node to update according to <b>(METHOD)</b>.
*/
public void updateMethod(BigStepProofContext pContext, BigStepProofNode pNode) {
if ((pNode.getChildCount() == 1) && (pNode.getChildAt(0).isProven())) {
Row row = (Row) pNode.getExpression();
Row childRow = (Row) pNode.getChildAt(0).getResult().getValue();
Expression[] newRowExpressions = new Expression[row.getExpressions().length];
newRowExpressions[0] = row.getExpressions()[0];
for (int i = 1; i < newRowExpressions.length; i++) {
newRowExpressions[i] = childRow.getExpressions()[i - 1];
}
pContext.setProofNodeResult(pNode, new Row(newRowExpressions));
}
}
/**
* Updates the <code>node</code> to which <b>(SEND)</b> was applied previously.
*
* @param pContext The big step proof context.
* @param pNode The node to update according to <b>(SEND)</b>.
*/
public void updateSend(BigStepProofContext pContext, BigStepProofNode pNode) {
if ((pNode.getChildCount() == 1) && (pNode.getChildAt(0).isProven())) {
Send send = (Send) pNode.getExpression();
ObjectExpr objectExpr = (ObjectExpr) pNode.getChildAt(0).getResult().getValue();
Row row = objectExpr.getRow();
Expression newRow;
newRow = row.substitute(objectExpr.getId(), objectExpr);
pContext.addProofNode(pNode, new Send(newRow, send.getId()));
} else if ((pNode.getChildCount() == 2)
&& (pNode.getChildAt(0).isProven())
&& (pNode.getChildAt(1).isProven())) {
pContext.setProofNodeResult(pNode, pNode.getChildAt(1).getResult());
}
}
/**
* Updates the <code>node</code> to which <b>(ATTR)</b> was applied previously.
*
* @param pContext The big step proof context.
* @param pNode The node to update according to <b>(ATTR)</b>.
*/
public void updateAttr(BigStepProofContext pContext, BigStepProofNode pNode) {
if ((pNode.getChildCount() == 2)
&& (pNode.getChildAt(0).isProven())
&& (pNode.getChildAt(1).isProven())) {
Row row = (Row) pNode.getExpression();
Expression childExpression = pNode.getChildAt(0).getResult().getValue();
Row childRow = (Row) pNode.getChildAt(1).getResult().getValue();
Attribute attribute = (Attribute) row.getExpressions()[0];
Expression[] newRowExpressions = new Expression[row.getExpressions().length];
Attribute newAttribute = new Attribute(attribute.getId(), childExpression);
newRowExpressions[0] = newAttribute;
for (int i = 1; i < newRowExpressions.length; i++) {
newRowExpressions[i] = childRow.getExpressions()[i - 1];
}
pContext.setProofNodeResult(pNode, new Row(newRowExpressions));
}
}
/**
* Updates the <code>node</code> to which <b>(SEND-SKIP)</b> was applied previously.
*
* @param pContext The big step proof context.
* @param pNode The node to update according to <b>(SEND-SKIP)</b>.
*/
public void updateSendSkip(BigStepProofContext pContext, BigStepProofNode pNode) {
if (pNode.getChildAt(0).isProven()) {
pContext.setProofNodeResult(pNode, pNode.getChildAt(0).getResult());
}
}