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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.core.engine.event;
import java.io.Serializable;
import org.onap.policy.apex.context.ContextRuntimeException;
import org.onap.policy.apex.context.SchemaHelper;
import org.onap.policy.apex.context.impl.schema.SchemaHelperFactory;
import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
import org.onap.policy.apex.model.eventmodel.concepts.AxField;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* Instances of the Class EnField are event fields being passed through the Apex system.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class EnField implements Serializable {
private static final long serialVersionUID = -5713525780081840333L;
// Logger for this class
private static final XLogger LOGGER = XLoggerFactory.getXLogger(EnField.class);
// The definition of this field in the Apex model
private final AxField axField;
// The schema helper for this field
private transient SchemaHelper schemaHelper;
// The value of this field
private final transient Object value;
/**
* Instantiates a new EnField, an Engine Field.
*
* @param axField the field definition from the Apex model
* @param value the value
*/
public EnField(final AxField axField, final Object value) {
// Save the field definition from the Apex model
this.axField = axField;
this.value = value;
// Get a schema helper to handle translations of fields to and from the schema
try {
schemaHelper = new SchemaHelperFactory().createSchemaHelper(axField.getKey(), axField.getSchema());
} catch (final ContextRuntimeException e) {
final String message = "schema helper cannot be created for parameter with key \"" + axField.getId()
+ "\" with schema \"" + axField.getSchema() + "\"";
LOGGER.warn(message, e);
throw new EnException(message, e);
}
}
/**
* Gets the field definition of this field.
*
* @return the field definition
*/
public AxField getAxField() {
return axField;
}
/**
* Gets the schema helper of this field.
*
* @return the schema helper for this field
*/
public SchemaHelper getSchemaHelper() {
return schemaHelper;
}
/**
* Get the name of the field.
*
* @return the field name
*/
public String getName() {
return axField.getKey().getLocalName();
}
/**
* Get the key of the field.
*
* @return the field key
*/
public AxReferenceKey getKey() {
return axField.getKey();
}
/**
* Get the value of the field.
*
* @return the value
*/
public Object getValue() {
return value;
}
/**
* {@inheritDoc}.
*/
@Override
public String toString() {
return "EnField [axField=" + axField + ", value=" + value + "]";
}
/**
* Get an assignable object that will work with the field.
*
* @return the assignable value
*/
public Object getAssignableValue() {
// Use the schema helper to get the translated value of the object
return schemaHelper.unmarshal(value);
}
/**
* Is the value object assignable to this field.
*
* @return true if the value is assignable
*/
public boolean isAssignableValue() {
try {
schemaHelper.unmarshal(value);
return true;
} catch (final Exception e) {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace("value {} is not assignable to this field", value, e);
}
return false;
}
}
}
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