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/*
* Copyright 2006-2018 the original author or authors.
*
* 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
*
* https://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 org.springframework.batch.core.converter;
import org.springframework.batch.core.JobInstance;
import org.springframework.batch.core.JobParameter;
import org.springframework.batch.core.JobParameter.ParameterType;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.JobParametersBuilder;
import org.springframework.lang.Nullable;
import org.springframework.util.StringUtils;
import java.text.DateFormat;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
/**
* Converter for {@link JobParameters} instances using a simple naming
* convention for property keys. Key names that are prefixed with a - are
* considered non-identifying and will not contribute to the identity of a
* {@link JobInstance}. Key names ending with "(<type>)" where
* type is one of string, date, long are converted to the corresponding type.
* The default type is string. E.g.
*
*
*
* The literal values are converted to the correct type using the default Spring
* strategies, augmented if necessary by the custom editors provided.
*
*
*
* If you need to be able to parse and format local-specific dates and numbers,
* you can inject formatters ({@link #setDateFormat(DateFormat)} and
* {@link #setNumberFormat(NumberFormat)}).
*
* @author Dave Syer
* @author Michael Minella
* @author Mahmoud Ben Hassine
*
*/
public class DefaultJobParametersConverter implements JobParametersConverter {
public static final String DATE_TYPE = "(date)";
public static final String STRING_TYPE = "(string)";
public static final String LONG_TYPE = "(long)";
private static final String DOUBLE_TYPE = "(double)";
private static final String NON_IDENTIFYING_FLAG = "-";
private static final String IDENTIFYING_FLAG = "+";
private static NumberFormat DEFAULT_NUMBER_FORMAT = NumberFormat.getInstance(Locale.US);
private DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");
private NumberFormat numberFormat = DEFAULT_NUMBER_FORMAT;
private final NumberFormat longNumberFormat = new DecimalFormat("#");
/**
* Check for suffix on keys and use those to decide how to convert the
* value.
*
* @throws IllegalArgumentException if a number or date is passed in that
* cannot be parsed, or cast to the correct type.
*
* @see org.springframework.batch.core.converter.JobParametersConverter#getJobParameters(java.util.Properties)
*/
@Override
public JobParameters getJobParameters(@Nullable Properties props) {
if (props == null || props.isEmpty()) {
return new JobParameters();
}
JobParametersBuilder propertiesBuilder = new JobParametersBuilder();
for (Iterator> it = props.entrySet().iterator(); it.hasNext();) {
Entry entry = it.next();
String key = (String) entry.getKey();
String value = (String) entry.getValue();
boolean identifying = isIdentifyingKey(key);
if(!identifying) {
key = key.replaceFirst(NON_IDENTIFYING_FLAG, "");
} else if(identifying && key.startsWith(IDENTIFYING_FLAG)) {
key = key.replaceFirst("\\" + IDENTIFYING_FLAG, "");
}
if (key.endsWith(DATE_TYPE)) {
Date date;
synchronized (dateFormat) {
try {
date = dateFormat.parse(value);
}
catch (ParseException ex) {
String suffix = (dateFormat instanceof SimpleDateFormat) ? ", use "
+ ((SimpleDateFormat) dateFormat).toPattern() : "";
throw new IllegalArgumentException("Date format is invalid: [" + value + "]" + suffix);
}
}
propertiesBuilder.addDate(StringUtils.replace(key, DATE_TYPE, ""), date, identifying);
}
else if (key.endsWith(LONG_TYPE)) {
Long result;
try {
result = (Long) parseNumber(value);
}
catch (ClassCastException ex) {
throw new IllegalArgumentException("Number format is invalid for long value: [" + value
+ "], use a format with no decimal places");
}
propertiesBuilder.addLong(StringUtils.replace(key, LONG_TYPE, ""), result, identifying);
}
else if (key.endsWith(DOUBLE_TYPE)) {
Double result = parseNumber(value).doubleValue();
propertiesBuilder.addDouble(StringUtils.replace(key, DOUBLE_TYPE, ""), result, identifying);
}
else if (StringUtils.endsWithIgnoreCase(key, STRING_TYPE)) {
propertiesBuilder.addString(StringUtils.replace(key, STRING_TYPE, ""), value, identifying);
}
else {
propertiesBuilder.addString(key, value, identifying);
}
}
return propertiesBuilder.toJobParameters();
}
private boolean isIdentifyingKey(String key) {
boolean identifying = true;
if(key.startsWith(NON_IDENTIFYING_FLAG)) {
identifying = false;
}
return identifying;
}
/**
* Delegate to {@link NumberFormat} to parse the value
*/
private Number parseNumber(String value) {
synchronized (numberFormat) {
try {
return numberFormat.parse(value);
}
catch (ParseException ex) {
String suffix = (numberFormat instanceof DecimalFormat) ? ", use "
+ ((DecimalFormat) numberFormat).toPattern() : "";
throw new IllegalArgumentException("Number format is invalid: [" + value + "], use " + suffix);
}
}
}
/**
* Use the same suffixes to create properties (omitting the string suffix
* because it is the default). Non-identifying parameters will be prefixed
* with the {@link #NON_IDENTIFYING_FLAG}. However, since parameters are
* identifying by default, they will not be prefixed with the
* {@link #IDENTIFYING_FLAG}.
*
* @see org.springframework.batch.core.converter.JobParametersConverter#getProperties(org.springframework.batch.core.JobParameters)
*/
@Override
public Properties getProperties(@Nullable JobParameters params) {
if (params == null || params.isEmpty()) {
return new Properties();
}
Map parameters = params.getParameters();
Properties result = new Properties();
for (Entry entry : parameters.entrySet()) {
String key = entry.getKey();
JobParameter jobParameter = entry.getValue();
Object value = jobParameter.getValue();
if (value != null) {
key = (!jobParameter.isIdentifying()? NON_IDENTIFYING_FLAG : "") + key;
if (jobParameter.getType() == ParameterType.DATE) {
synchronized (dateFormat) {
result.setProperty(key + DATE_TYPE, dateFormat.format(value));
}
}
else if (jobParameter.getType() == ParameterType.LONG) {
synchronized (longNumberFormat) {
result.setProperty(key + LONG_TYPE, longNumberFormat.format(value));
}
}
else if (jobParameter.getType() == ParameterType.DOUBLE) {
result.setProperty(key + DOUBLE_TYPE, decimalFormat((Double)value));
}
else {
result.setProperty(key, "" + value);
}
}
}
return result;
}
/**
* @param value a decimal value
* @return a best guess at the desired format
*/
private String decimalFormat(double value) {
if (numberFormat != DEFAULT_NUMBER_FORMAT) {
synchronized (numberFormat) {
return numberFormat.format(value);
}
}
return Double.toString(value);
}
/**
* Public setter for injecting a date format.
*
* @param dateFormat a {@link DateFormat}, defaults to "yyyy/MM/dd"
*/
public void setDateFormat(DateFormat dateFormat) {
this.dateFormat = dateFormat;
}
/**
* Public setter for the {@link NumberFormat}. Used to parse longs and
* doubles, so must not contain decimal place (e.g. use "#" or "#,###").
*
* @param numberFormat the {@link NumberFormat} to set
*/
public void setNumberFormat(NumberFormat numberFormat) {
this.numberFormat = numberFormat;
}
}
