/**
* Copyright 2011-2014 Asakusa Framework Team.
*
* 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.
*/
package com.asakusafw.dmdl.directio.hive.common;
import java.util.Map;
import com.asakusafw.dmdl.model.AstAttribute;
import com.asakusafw.dmdl.model.AstAttributeElement;
import com.asakusafw.dmdl.model.AstLiteral;
import com.asakusafw.dmdl.model.LiteralKind;
import com.asakusafw.dmdl.semantics.DmdlSemantics;
import com.asakusafw.dmdl.semantics.PropertyDeclaration;
import com.asakusafw.dmdl.spi.PropertyAttributeDriver;
import com.asakusafw.dmdl.util.AttributeUtil;
/**
* Processes <code>@directio.hive.field</code> attributes.
<h2>'@directio.hive.field' attribute</h2>
The attributed declaration must be:
<ul>
<li> with name=[string-literal] (default: property name)</li>
</ul>
* @since 0.7.0
*/
public class HiveFieldDriver extends PropertyAttributeDriver {
/**
* The attribute name.
*/
public static final String TARGET_NAME = "directio.hive.field"; //$NON-NLS-1$
/**
* The element name.
*/
public static final String ELEMENT_NAME = "name"; //$NON-NLS-1$
@Override
public String getTargetName() {
return TARGET_NAME;
}
@Override
public void process(
DmdlSemantics environment,
PropertyDeclaration declaration,
AstAttribute attribute) {
HiveFieldTrait trait = HiveFieldTrait.get(declaration);
trait.setOriginalAst(attribute, true);
Map<String, AstAttributeElement> elements = AttributeUtil.getElementMap(attribute);
analyzeElements(environment, attribute, elements, trait);
}
private void analyzeElements(
DmdlSemantics environment,
AstAttribute attribute,
Map<String, AstAttributeElement> elements,
HiveFieldTrait trait) {
AstLiteral name =
AttributeUtil.takeLiteral(environment, attribute, elements, ELEMENT_NAME, LiteralKind.STRING, true);
if (name != null) {
String value = name.toStringValue();
if (AttributeUtil.checkPresent(environment, name, label(ELEMENT_NAME), value)) {
trait.setColumnName(value);
}
}
environment.reportAll(AttributeUtil.reportInvalidElements(attribute, elements.values()));
}
private static String label(String key) {
return String.format("@%s(%s)", TARGET_NAME, key); //$NON-NLS-1$
}
}