/* Check the input streams against a parameter value and outputs
a boolean true if result is correct.
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review output port.
*/
package ptolemy.actor.lib;
import java.util.ArrayList;
import ptolemy.actor.TypedIOPort;
import ptolemy.data.ArrayToken;
import ptolemy.data.BooleanToken;
import ptolemy.data.RecordToken;
import ptolemy.data.Token;
import ptolemy.data.type.BaseType;
import ptolemy.kernel.CompositeEntity;
import ptolemy.kernel.util.IllegalActionException;
import ptolemy.kernel.util.NameDuplicationException;
//////////////////////////////////////////////////////////////////////////
//// Test
/**
<p>This actor compares the inputs against the value specified by the
<i>correctValues</i> parameter. That parameter is an ArrayToken,
where each element of the array should have the same type as the
input. The length of this array is the number of iterations of this
actor that are tested. Subsequent iterations always succeed, so the
actor can be used as a "power-up" test for a model, checking the first
few iterations against some known results.
</p><p>
The input is a multiport. If there is more than one channel connected
to it, then each element of <i>correctValues</i> must itself be an
ArrayToken, with length matching the number of channels.
Suppose for example that the width of the input is one,
and the first three inputs should be 1, 2, and 3. Then you can
set <i>correctValues</i> to
<pre>
{1, 2, 3}
</pre>
Suppose instead that the input has width two, and the correct values
in the first iteration are 1 on the first channel and 2 on the second.
Then on the second iteration, the correct values are 3 on the first
channel and 4 on the second. Then you can set <i>correctValues</i> to
<pre>
{{1, 2}, {3, 4}}
</pre>
With this setting, no tests are performed after the first two iterations
of this actor.
</p><p>
The input values are checked in the fire() method, which checks to
make sure that each input channel has a token. If an input value is
missing or differs from what it should be, then fire() throws an
exception. Thus, the test passes if no exception is thrown.
If you need to check the input value in postfire() (say, after
a fixed-point iteration has converged), then use NonStrictTest.
</p><p>
If the input is a DoubleToken or ComplexToken,
then the comparison passes if the value is close to what it should
be, within the specified <i>tolerance</i> (which defaults to
10<sup>-9</sup>. The input data type is undeclared, so it can
resolve to anything.
</p><p>
On each firing, this actor produces the output <i>false</i> until
it reaches the end of the <i>correctValues</i> array, at which point
it outputs <i>true</i>. This can be fed, for example, to an instance
of the Stop actor to stop the test upon successfully matching the
test data.</p>
@see NonStrictTest
@author Edward A. Lee, Christopher Hylands, Jim Armstrong
@version $Id$
@since Ptolemy II 1.0
@Pt.ProposedRating Yellow (eal)
@Pt.AcceptedRating Yellow (cxh)
*/
public class Test extends NonStrictTest {
/** Construct an actor with an input multiport.
* @param container The container.
* @param name The name of this actor.
* @exception IllegalActionException If the entity cannot be contained
* by the proposed container.
* @exception NameDuplicationException If the container already has an
* actor with this name.
*/
public Test(CompositeEntity container, String name)
throws NameDuplicationException, IllegalActionException {
super(container, name);
// Note that the parent class (NonStrictTest) does not have a multiport
// input port.
input.setMultiport(true);
output = new TypedIOPort(this, "output", false, true);
output.setTypeEquals(BaseType.BOOLEAN);
}
///////////////////////////////////////////////////////////////////
//// ports ////
/** Boolean output that is false as long as there is data to
* compare against the input, but becomes true on the first
* firing after such data has been exhausted.
*/
public TypedIOPort output;
///////////////////////////////////////////////////////////////////
//// public methods ////
/** Read one token from each input channel and compare against
* the value specified in <i>correctValues</i>. If the value
* matches, then output false (to indicate that the test is not
* complete yet) and return. Otherwise, throw an exception.
* If the iteration count is larger than the length of
* <i>correctValues</i>, then output <i>true</i> and return,
* indicating that the test is complete, i.e. that all
* values in <i>correctValues</i> have been matched.
*
* @exception IllegalActionException If an input is missing,
* or if its value does not match the required value.
*/
public void fire() throws IllegalActionException {
super.fire();
int width = input.getWidth();
// If we are in training mode, read the inputs and add to the
// training data.
boolean training = ((BooleanToken) trainingMode.getToken())
.booleanValue();
if (training) {
if (_trainingTokens == null) {
_trainingTokens = new ArrayList();
}
if (width == 1) {
if (input.hasToken(0)) {
Token token = input.get(0);
if (token instanceof ArrayToken) {
Token[] innerArrayToken = new Token[1];
innerArrayToken[0] = token;
_trainingTokens.add(innerArrayToken);
} else {
_trainingTokens.add(token);
}
}
} else {
ArrayList arrayList = new ArrayList();
for (int i = 0; i < width; i++) {
arrayList.add(input.get(i));
}
_trainingTokens.add(arrayList);
}
return;
}
if (_numberOfInputTokensSeen >= ((ArrayToken) (correctValues.getToken()))
.length()) {
// Consume and discard input values. We are beyond the end
// of the correctValues array.
for (int i = 0; i < width; i++) {
if (input.hasToken(i)) {
input.get(i);
}
}
// Indicate that the test has passed.
output.send(0, new BooleanToken(true));
return;
}
output.send(0, new BooleanToken(false));
Token referenceToken = ((ArrayToken) (correctValues.getToken()))
.getElement(_numberOfInputTokensSeen);
Token[] reference;
if ((width == 1) && !(referenceToken instanceof ArrayToken)) {
reference = new Token[1];
reference[0] = referenceToken;
} else {
try {
reference = ((ArrayToken) referenceToken).arrayValue();
} catch (ClassCastException ex) {
throw new IllegalActionException(this,
"Test fails in iteration " + _numberOfInputTokensSeen
+ ".\n" + "Width of input is " + width
+ ", but correctValues parameter "
+ "is not an array " + "of arrays.");
}
if (width != reference.length) {
throw new IllegalActionException(this,
"Test fails in iteration " + _numberOfInputTokensSeen
+ ".\n" + "Width of input is " + width
+ ", which does not match "
+ "the width of the "
+ _numberOfInputTokensSeen + "-th element of"
+ " correctValues, " + reference.length);
}
}
for (int i = 0; i < width; i++) {
if (!input.hasToken(i)) {
throw new IllegalActionException(this,
"Test fails in iteration " + _numberOfInputTokensSeen
+ ".\n" + "Empty input on channel " + i);
}
Token token = input.get(i);
boolean isClose;
try {
isClose = token.isCloseTo(reference[i], _tolerance)
.booleanValue()
|| token.isNil() && reference[i].isNil();
// Additional guards makes things slightly easier for
// Copernicus.
if (token instanceof ArrayToken
&& reference[i] instanceof ArrayToken) {
isClose |= _isCloseToIfNilArrayElement(token, reference[i],
_tolerance);
}
if (token instanceof RecordToken
&& reference[i] instanceof RecordToken) {
isClose |= _isCloseToIfNilRecordElement(token,
reference[i], _tolerance);
}
} catch (IllegalActionException ex) {
// Chain the exceptions together so we know which test
// actor failed if there was more than one...
throw new IllegalActionException(this, ex,
"Test fails in iteration " + _numberOfInputTokensSeen
+ ".\n" + "Value was: " + token
+ ". Should have been: " + reference[i]);
}
if (!isClose) {
throw new IllegalActionException(this,
"Test fails in iteration " + _numberOfInputTokensSeen
+ ".\n" + "Value was: " + token
+ ". Should have been: " + reference[i]);
}
}
_numberOfInputTokensSeen++;
}
/** Override the base class to do nothing and return true.
* @return True.
*/
public boolean postfire() {
return true;
}
}