/**
* Copyright 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.testdriver.excel.extension;
import java.math.BigDecimal;
import java.text.MessageFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import com.asakusafw.testdriver.core.PropertyName;
import com.asakusafw.testdriver.core.PropertyType;
import com.asakusafw.testdriver.core.VerifyContext;
import com.asakusafw.testdriver.excel.ExcelRuleExtractor.FormatException;
import com.asakusafw.testdriver.excel.ExcelSheetRuleExtension;
import com.asakusafw.testdriver.rule.Predicates;
import com.asakusafw.testdriver.rule.ValuePredicate;
/**
* Approximate comparison extension for testing rules in Excel sheet.
* @since 0.7.0
*/
public class ExcelSheetApproximateRule implements ExcelSheetRuleExtension {
private static final Pattern PATTERN = Pattern.compile("\\s*~\\s*([\\+\\-]\\s*)?(.+)");
private static final String TRIGGER = "~";
private static final String SIGN_PLUS = "+";
private static final String SIGN_MINUS = "-";
@Override
public ValuePredicate<?> resolve(
VerifyContext context,
PropertyName name,
PropertyType type,
String expression) throws FormatException {
if (expression.trim().startsWith(TRIGGER) == false) {
return null;
}
Matcher matcher = PATTERN.matcher(expression);
if (matcher.matches() == false) {
throw new FormatException(MessageFormat.format(
"Invalid approx(~) expression: {0}",
name));
}
String sign = matcher.group(1);
boolean plus = sign == null || sign.equals(SIGN_PLUS);
boolean minus = sign == null || sign.equals(SIGN_MINUS);
String magnitude = matcher.group(2).trim();
switch (type) {
case BYTE:
case SHORT:
case INT:
case LONG:
try {
long value = Long.parseLong(magnitude);
return Predicates.integerRange(minus ? -value : 0, plus ? +value : 0);
} catch (NumberFormatException e) {
throw new FormatException(MessageFormat.format(
"Invalid approx(~) error \"{1}\": {0}",
name,
magnitude), e);
}
case FLOAT:
case DOUBLE:
try {
double value = Double.parseDouble(magnitude);
return Predicates.floatRange(minus ? -value : 0, plus ? +value : 0);
} catch (NumberFormatException e) {
throw new FormatException(MessageFormat.format(
"Invalid approx(~) value \"{1}\": {0}",
name,
magnitude), e);
}
case DECIMAL:
try {
BigDecimal value = new BigDecimal(magnitude);
return Predicates.decimalRange(
minus ? value.negate() : BigDecimal.ZERO,
plus ? value : BigDecimal.ZERO);
} catch (NumberFormatException e) {
throw new FormatException(MessageFormat.format(
"Invalid approx(~) error \"{1}\": {0}",
name,
magnitude), e);
}
case DATE:
case DATETIME:
try {
int value = Integer.parseInt(magnitude);
if (type == PropertyType.DATE) {
return Predicates.dateRange(minus ? -value : 0, plus ? +value : 0);
} else {
return Predicates.timeRange(minus ? -value : 0, plus ? +value : 0);
}
} catch (NumberFormatException e) {
throw new FormatException(MessageFormat.format(
"Invalid approx(~) error \"{1}\": {0}",
name,
magnitude), e);
}
default:
throw new FormatException(MessageFormat.format(
"Property does not support approx(~) expression: {0}",
name));
}
}
}