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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JasperReports is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with JasperReports. If not, see .
*/
package net.sf.jasperreports.engine.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperReportsContext;
import net.sf.jasperreports.engine.type.JsonOperatorEnum;
import net.sf.jasperreports.repo.RepositoryContext;
import net.sf.jasperreports.repo.RepositoryUtil;
import net.sf.jasperreports.repo.SimpleRepositoryContext;
/**
*
* @author Narcis Marcu ([email protected])
*/
public class JsonUtil {
private static final Log log = LogFactory.getLog(JsonUtil.class);
public static final String EXCEPTION_MESSAGE_KEY_UNKNOWN_OPERATOR = "util.json.unknown.operator";
public static boolean evaluateJsonExpression(JsonNode contextNode, String attributeExpression) throws JRException {
if (attributeExpression == null) {
return true;
}
String attribute = null;
JsonOperatorEnum operator = null;
String value = null;
boolean result = false;
for (JsonOperatorEnum joe: JsonOperatorEnum.values()) {
int indexOfOperator = attributeExpression.indexOf(joe.getValue());
if (indexOfOperator != -1) {
operator = joe;
attribute = attributeExpression.substring(0, indexOfOperator).trim();
value = attributeExpression.substring(indexOfOperator + joe.getValue().length()).trim();
break;
}
}
if (operator == null) {
StringBuilder possibleOperations = new StringBuilder();
for (JsonOperatorEnum op: JsonOperatorEnum.values()) {
possibleOperations.append(op.getValue()).append(",");
}
throw
new JRException(
EXCEPTION_MESSAGE_KEY_UNKNOWN_OPERATOR,
new Object[]{attributeExpression, possibleOperations});
}
if (attribute != null && operator != null && value != null) {
// going down the path of the attribute must return a value node
if (!contextNode.path(attribute).isValueNode()) {
result = false;
} else {
String contextValue = contextNode.path(attribute).asText();
switch(operator) {
case LT:
try {
result = Double.parseDouble(contextValue) < Double.parseDouble(value);
} catch (NumberFormatException nfe) {
result = false;
}
break;
case LE:
try {
result = Double.parseDouble(contextValue) <= Double.parseDouble(value);
} catch (NumberFormatException nfe) {
result = false;
}
break;
case GT:
try {
result = Double.parseDouble(contextValue) > Double.parseDouble(value);
} catch (NumberFormatException nfe) {
result = false;
}
break;
case GE:
try {
result = Double.parseDouble(contextValue) >= Double.parseDouble(value);
} catch (NumberFormatException nfe) {
result = false;
}
break;
case EQ:
result = contextValue.equals(value);
break;
case NE:
result = !contextValue.equals(value);
break;
}
}
}
return result;
}
public static ObjectMapper createObjectMapper() {
ObjectMapper mapper = new ObjectMapper();
mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
mapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
return mapper;
}
public static JsonNode parseJson(File file) throws JRException {
FileInputStream fileInputStream = null;
try {
fileInputStream = new FileInputStream(file);
return parseJson(fileInputStream);
} catch (FileNotFoundException e) {
throw new JRException(e);
} finally {
if (fileInputStream != null) {
try {
fileInputStream.close();
} catch (IOException e) {
if (log.isWarnEnabled()) {
log.warn("Failed to close input stream for file " + file, e);
}
}
}
}
}
public static JsonNode parseJson(JasperReportsContext jasperReportsContext, String location) throws JRException {
return parseJson(SimpleRepositoryContext.of(jasperReportsContext), location);
}
public static JsonNode parseJson(RepositoryContext repositoryContext, String location) throws JRException {
RepositoryUtil repository = RepositoryUtil.getInstance(repositoryContext);
InputStream stream = repository.getInputStreamFromLocation(location);
try {
return parseJson(stream);
} finally {
if (stream != null) {
try {
stream.close();
} catch (IOException e) {
if (log.isWarnEnabled()) {
log.warn("Failed to close input stream for location " + location, e);
}
}
}
}
}
public static JsonNode parseJson(InputStream jsonStream) throws JRException {
ObjectMapper mapper = createObjectMapper();
JsonNode jsonTree;
try {
jsonTree = mapper.readTree(jsonStream);
} catch (JsonProcessingException e) {
throw new JRException(e);
} catch (IOException e) {
throw new JRException(e);
}
return jsonTree;
}
}