BooleanAdapter.java
/*
* SPDX-FileCopyrightText: none
* SPDX-License-Identifier: CC0-1.0
*/
package gov.nist.secauto.metaschema.core.datatype.adapter;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatTypes;
import gov.nist.secauto.metaschema.core.datatype.AbstractDataTypeAdapter;
import gov.nist.secauto.metaschema.core.metapath.MetapathConstants;
import gov.nist.secauto.metaschema.core.metapath.function.InvalidValueForCastFunctionException;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.IAnyAtomicItem;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.IBooleanItem;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.INumericItem;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.IStringItem;
import gov.nist.secauto.metaschema.core.util.ObjectUtils;
import java.io.IOException;
import java.util.List;
import javax.xml.namespace.QName;
import edu.umd.cs.findbugs.annotations.NonNull;
public class BooleanAdapter
extends AbstractDataTypeAdapter<Boolean, IBooleanItem> {
@NonNull
private static final List<QName> NAMES = ObjectUtils.notNull(
List.of(new QName(MetapathConstants.NS_METAPATH.toASCIIString(), "boolean")));
BooleanAdapter() {
super(Boolean.class);
}
@Override
public List<QName> getNames() {
return NAMES;
}
@Override
public JsonFormatTypes getJsonRawType() {
return JsonFormatTypes.BOOLEAN;
}
@SuppressWarnings("null")
@Override
public Boolean parse(String value) {
return Boolean.valueOf(value);
}
@Override
public Boolean parse(JsonParser parser) throws IOException {
Boolean value = parser.getBooleanValue();
// skip over value
parser.nextToken();
return value;
}
@Override
public void writeJsonValue(Object value, JsonGenerator generator)
throws IOException {
try {
generator.writeBoolean((Boolean) value);
} catch (ClassCastException ex) {
throw new IOException(ex);
}
}
@Override
public Boolean copy(Object obj) {
// the value is immutable
return (Boolean) obj;
}
@Override
public Class<IBooleanItem> getItemClass() {
return IBooleanItem.class;
}
@Override
public IBooleanItem newItem(Object value) {
Boolean item = toValue(value);
return IBooleanItem.valueOf(item);
}
@Override
protected IBooleanItem castInternal(@NonNull IAnyAtomicItem item) {
IBooleanItem retval;
if (item instanceof INumericItem) {
retval = castToBoolean((INumericItem) item);
} else if (item instanceof IStringItem) {
retval = castToBoolean((IStringItem) item);
} else {
try {
retval = castToBoolean(item.asStringItem());
} catch (IllegalStateException ex) {
throw new InvalidValueForCastFunctionException(ex.getLocalizedMessage(), ex);
}
}
return retval;
}
/**
* Cast the provided numeric value to a boolean. Any non-zero value will be
* {@code true}, or {@code false} otherwise.
*
* @param item
* the item to cast
* @return {@code true} if the item value is non-zero, or {@code false}
* otherwise
*/
@NonNull
protected IBooleanItem castToBoolean(@NonNull INumericItem item) {
return IBooleanItem.valueOf(item.toEffectiveBoolean());
}
/**
* If the string is a numeric value, treat it as so. Otherwise parse the value
* as a boolean string.
*
* @param item
* the item to cast
* @return the effective boolean value of the string
* @throws InvalidValueForCastFunctionException
* if the provided item cannot be cast to a boolean value by any means
*/
@NonNull
protected IBooleanItem castToBoolean(@NonNull IStringItem item) {
IBooleanItem retval;
try {
INumericItem numeric = INumericItem.cast(item);
retval = castToBoolean(numeric);
} catch (InvalidValueForCastFunctionException ex) {
retval = super.castInternal(item);
}
return retval;
}
}