/**
* 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 org.apache.hadoop.hive.common.type.HiveDecimal;
import com.asakusafw.dmdl.Diagnostic;
import com.asakusafw.dmdl.Diagnostic.Level;
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.decimal</code> attributes.
<h2>'@directio.hive.decimal' attribute</h2>
The attributed declaration must be:
<ul>
<li> with precision=[integer-literal]</li>
<li> with scale=[integer-literal]</li>
</ul>
* @since 0.7.0
*/
public class HiveDecimalDriver extends PropertyAttributeDriver {
/**
* The attribute name.
*/
public static final String TARGET_NAME = "directio.hive.decimal"; //$NON-NLS-1$
/**
* The precision element name.
*/
public static final String ELEMENT_PRECISION_NAME = "precision"; //$NON-NLS-1$
/**
* The scale element name.
*/
public static final String ELEMENT_SCALE_NAME = "scale"; //$NON-NLS-1$
@Override
public String getTargetName() {
return TARGET_NAME;
}
@Override
public void process(
DmdlSemantics environment,
PropertyDeclaration declaration,
AstAttribute attribute) {
if (Util.checkProperty(environment, declaration, attribute, HiveFieldTrait.TypeKind.DECIMAL) == false) {
return;
}
HiveFieldTrait trait = HiveFieldTrait.get(declaration);
trait.setOriginalAst(attribute, false);
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 precision = AttributeUtil.takeLiteral(
environment, attribute, elements, ELEMENT_PRECISION_NAME, LiteralKind.INTEGER, true);
int precisionValue = -1;
if (precision != null) {
if (AttributeUtil.checkRange(
environment, precision, label(ELEMENT_PRECISION_NAME),
precision.toIntegerValue(), 1L, (long) HiveDecimal.MAX_PRECISION)) {
precisionValue = precision.toIntegerValue().intValue();
}
}
AstLiteral scale = AttributeUtil.takeLiteral(
environment, attribute, elements, ELEMENT_SCALE_NAME, LiteralKind.INTEGER, true);
int scaleValue = -1;
if (scale != null) {
if (AttributeUtil.checkRange(
environment, scale, label(ELEMENT_SCALE_NAME),
scale.toIntegerValue(), 0L, (long) HiveDecimal.MAX_SCALE)) {
scaleValue = scale.toIntegerValue().intValue();
}
}
if (precisionValue >= 0 && scaleValue >= 0) {
if (precisionValue < scaleValue) {
environment.report(new Diagnostic(
Level.ERROR,
attribute,
Messages.getString("HiveDecimalDriver.diagnosticPrecisionLessThanScale"), //$NON-NLS-1$
TARGET_NAME,
ELEMENT_PRECISION_NAME, precisionValue,
ELEMENT_SCALE_NAME, scaleValue));
} else {
trait.setDecimalTypeInfo(precisionValue, scaleValue);
}
}
environment.reportAll(AttributeUtil.reportInvalidElements(attribute, elements.values()));
}
private static String label(String key) {
return String.format("@%s(%s)", TARGET_NAME, key); //$NON-NLS-1$
}
}