org.nakedobjects.metamodel.specloader.internal.NakedObjectActionParameterParseable Maven / Gradle / Ivy
package org.nakedobjects.metamodel.specloader.internal;
import org.nakedobjects.metamodel.adapter.Instance;
import org.nakedobjects.metamodel.adapter.MutableProposedHolder;
import org.nakedobjects.metamodel.adapter.NakedObject;
import org.nakedobjects.metamodel.consent.InteractionInvocationMethod;
import org.nakedobjects.metamodel.consent.InteractionResultSet;
import org.nakedobjects.metamodel.facets.object.parseable.ParseableFacet;
import org.nakedobjects.metamodel.facets.propparam.multiline.MultiLineFacet;
import org.nakedobjects.metamodel.facets.propparam.typicallength.TypicalLengthFacet;
import org.nakedobjects.metamodel.facets.propparam.validate.maxlength.MaxLengthFacet;
import org.nakedobjects.metamodel.interactions.InteractionUtils;
import org.nakedobjects.metamodel.interactions.ValidityContext;
import org.nakedobjects.metamodel.spec.NakedObjectSpecification;
import org.nakedobjects.metamodel.spec.feature.NakedObjectActionParameter;
import org.nakedobjects.metamodel.spec.feature.OneToOneActionParameter;
import org.nakedobjects.metamodel.spec.feature.ParseableEntryActionParameter;
import org.nakedobjects.metamodel.specloader.internal.peer.NakedObjectActionParamPeer;
public class NakedObjectActionParameterParseable extends NakedObjectActionParameterAbstract implements
ParseableEntryActionParameter {
public NakedObjectActionParameterParseable(
final int index,
final NakedObjectActionImpl action,
final NakedObjectActionParamPeer peer) {
super(index, action, peer);
}
public int getNoLines() {
final MultiLineFacet facet = getFacet(MultiLineFacet.class);
return facet.numberOfLines();
}
public boolean canWrap() {
final MultiLineFacet facet = getFacet(MultiLineFacet.class);
return !facet.preventWrapping();
}
public int getMaximumLength() {
final MaxLengthFacet facet = getFacet(MaxLengthFacet.class);
return facet.value();
}
public int getTypicalLineLength() {
final TypicalLengthFacet facet = getFacet(TypicalLengthFacet.class);
return facet.value();
}
/**
* Invoked when tab away, disables the OK button.
*
*
* Assumed to be invoked {@link InteractionInvocationMethod#BY_USER by user}.
*/
public String isValid(final NakedObject nakedObject, final Object proposedValue) {
if (!(proposedValue instanceof String)) {
return null;
}
final String proposedString = (String) proposedValue;
final NakedObjectActionParameter nakedObjectActionParameter = getAction().getParameters()[getNumber()];
if (!(nakedObjectActionParameter instanceof ParseableEntryActionParameter)) {
return null;
}
final ParseableEntryActionParameter parameter = (ParseableEntryActionParameter) nakedObjectActionParameter;
final NakedObjectSpecification parameterSpecification = parameter.getSpecification();
final ParseableFacet p = parameterSpecification.getFacet(ParseableFacet.class);
final NakedObject newValue = p.parseTextEntry(null, proposedString);
final ValidityContext ic = parameter.createProposedArgumentInteractionContext(getAuthenticationSession(),
InteractionInvocationMethod.BY_USER, nakedObject, arguments(newValue), getNumber());
final InteractionResultSet buf = new InteractionResultSet();
InteractionUtils.isValidResultSet(parameter, ic, buf);
if (buf.isVetoed()) {
return buf.getInteractionResult().getReason();
}
return null;
}
/**
* TODO: this is not ideal, because we can only populate the array for single argument, rather than the
* entire argument set. Instead, we ought to do this in two passes, one to build up the argument set as a
* single unit, and then validate each in turn.
*
* @param proposedValue
* @return
*/
private NakedObject[] arguments(final NakedObject proposedValue) {
final int parameterCount = getAction().getParameterCount();
final NakedObject[] arguments = new NakedObject[parameterCount];
arguments[getNumber()] = proposedValue;
return arguments;
}
// /////////////////////////////////////////////////////////////
// getInstance
// /////////////////////////////////////////////////////////////
public Instance getInstance(NakedObject nakedObject) {
OneToOneActionParameter specification = this;
return nakedObject.getInstance(specification);
}
// //////////////////////////////////////////////////////////////////////
// get, set
// //////////////////////////////////////////////////////////////////////
/**
* Gets the proposed value of the {@link Instance} (downcast as a
* {@link MutableProposed}, wrapping the proposed value into a {@link NakedObject}.
*/
public NakedObject get(NakedObject owner) {
MutableProposedHolder proposedHolder = getProposedHolder(owner);
Object proposed = proposedHolder.getProposed();
return getRuntimeContext().adapterFor(proposed);
}
/**
* Sets the proposed value of the {@link Instance} (downcast as a
* {@link MutableProposed}, unwrapped the proposed value from a {@link NakedObject}.
*/
public void set(NakedObject owner, NakedObject newValue) {
MutableProposedHolder proposedHolder = getProposedHolder(owner);
Object newValuePojo = newValue.getObject();
proposedHolder.setProposed(newValuePojo);
}
private MutableProposedHolder getProposedHolder(NakedObject owner) {
Instance instance = getInstance(owner);
if(!(instance instanceof MutableProposedHolder)) {
throw new IllegalArgumentException("Instance should implement MutableProposedHolder");
}
MutableProposedHolder proposedHolder = (MutableProposedHolder) instance;
return proposedHolder;
}
}