variables) {\r\n\t\tif(StringUtils.isBlank(expression)){\r\n\t\t\treturn expression;\r\n\t\t}\r\n\t\tExpressionTemplateContext context = new ExpressionTemplateContext(variables);\r\n\t\tfor (FunctionExecutor executor : functionExecutors) {\r\n\t\t\tcontext.set(executor.getFunctionPrefix(), executor);\r\n\t\t}\r\n\t\tExpressionGlobalVariables.getVariables().entrySet().forEach(entry->{\r\n\t\t\tcontext.set(entry.getKey(),ExpressionTemplate.create(entry.getValue()).render(context));\r\n\t\t});\r\n\t\ttry {\r\n\t\t\tExpressionTemplateContext.set(context);\r\n\t\t\treturn ExpressionTemplate.create(expression).render(context);\r\n\t\t} finally {\r\n\t\t\tExpressionTemplateContext.remove();\r\n\t\t}\r\n\t}\r\n\t\r\n}\r\n"
},
{
"path": "spider-flow-core/src/main/java/org/spiderflow/core/expression/ExpressionError.java",
"content": "\npackage org.spiderflow.core.expression;\n\nimport org.spiderflow.core.expression.parsing.Span;\nimport org.spiderflow.core.expression.parsing.Span.Line;\nimport org.spiderflow.core.expression.parsing.TokenStream;\n\n/** All errors reported by the library go through the static functions of this class. */\npublic class ExpressionError {\n\n\t/**\n\t * \n\t * Create an error message based on the provided message and stream, highlighting the line on which the error happened. If the\n\t * stream has more tokens, the next token will be highlighted. Otherwise the end of the source of the stream will be\n\t * highlighted.\n\t *
\n\t *\n\t * \n\t * Throws a {@link RuntimeException}\n\t *
\n\t */\n\tpublic static void error (String message, TokenStream stream) {\n\t\tif (stream.hasMore())\n\t\t\terror(message, stream.consume().getSpan());\n\t\telse {\n\t\t\tString source = stream.getSource();\n\t\t\tif (source == null)\n\t\t\t\terror(message, new Span(\" \", 0, 1));\n\t\t\telse\n\t\t\t\terror(message, new Span(source, source.length() - 1, source.length()));\n\t\t}\n\t}\n\n\t/** Create an error message based on the provided message and location, highlighting the location in the line on which the\n\t * error happened. Throws a {@link TemplateException} **/\n\tpublic static void error (String message, Span location, Throwable cause) {\n\n\t\tLine line = location.getLine();\n\t\tmessage = \"Error (\" + line.getLineNumber() + \"): \" + message + \"\\n\\n\";\n\t\tmessage += line.getText();\n\t\tmessage += \"\\n\";\n\n\t\tint errorStart = location.getStart() - line.getStart();\n\t\tint errorEnd = errorStart + location.getText().length() - 1;\n\t\tfor (int i = 0, n = line.getText().length(); i < n; i++) {\n\t\t\tboolean useTab = line.getText().charAt(i) == '\\t';\n\t\t\tmessage += i >= errorStart && i <= errorEnd ? \"^\" : useTab ? \"\\t\" : \" \";\n\t\t}\n\n\t\tif (cause == null)\n\t\t\tthrow new TemplateException(message, location);\n\t\telse\n\t\t\tthrow new TemplateException(message, location, cause);\n\t}\n\n\t/** Create an error message based on the provided message and location, highlighting the location in the line on which the\n\t * error happened. Throws a {@link TemplateException} **/\n\tpublic static void error (String message, Span location) {\n\t\terror(message, location, null);\n\t}\n\n\t/** Exception thrown by all basis-template code via {@link ExpressionError#error(String, Span)}. In case an error happens deep inside a\n\t * list of included templates, the {@link #getMessage()} method will return a condensed error message. **/\n\tpublic static class TemplateException extends RuntimeException {\n\t\tprivate static final long serialVersionUID = 1L;\n\t\tprivate final Span location;\n\t\tprivate final String errorMessage;\n\n\t\tprivate TemplateException (String message, Span location) {\n\t\t\tsuper(message);\n\t\t\tthis.errorMessage = message;\n\t\t\tthis.location = location;\n\t\t}\n\n\t\tpublic TemplateException (String message, Span location, Throwable cause) {\n\t\t\tsuper(message, cause);\n\t\t\tthis.errorMessage = message;\n\t\t\tthis.location = location;\n\t\t}\n\n\t\t/** Returns the location in the template at which the error happened. **/\n\t\tpublic Span getLocation () {\n\t\t\treturn location;\n\t\t}\n\n\t\t@Override\n\t\tpublic String getMessage () {\n\t\t\tStringBuilder builder = new StringBuilder();\n\n\t\t\tif (getCause() == null || getCause() == this) {\n\t\t\t\treturn super.getMessage();\n\t\t\t}\n\n\t\t\tbuilder.append(errorMessage.substring(0, errorMessage.indexOf('\\n')));\n\t\t\tbuilder.append(\"\\n\");\n\n\t\t\tThrowable cause = getCause();\n\t\t\twhile (cause != null && cause != this) {\n\t\t\t\tif (cause instanceof TemplateException) {\n\t\t\t\t\tTemplateException ex = (TemplateException)cause;\n\t\t\t\t\tif (ex.getCause() == null || ex.getCause() == ex)\n\t\t\t\t\t\tbuilder.append(ex.errorMessage);\n\t\t\t\t\telse\n\t\t\t\t\t\tbuilder.append(ex.errorMessage.substring(0, ex.errorMessage.indexOf('\\n')));\n\t\t\t\t\tbuilder.append(\"\\n\");\n\t\t\t\t}\n\t\t\t\tcause = cause.getCause();\n\t\t\t}\n\t\t\treturn builder.toString();\n\t\t}\n\t}\n\t\n\tpublic static class StringLiteralException extends RuntimeException {\n\n\t\tprivate static final long serialVersionUID = 1L;\n\t\t\n\t}\n}\n"
},
{
"path": "spider-flow-core/src/main/java/org/spiderflow/core/expression/ExpressionGlobalVariables.java",
"content": "package org.spiderflow.core.expression;\n\nimport java.util.HashMap;\nimport java.util.Map;\nimport java.util.concurrent.locks.Lock;\nimport java.util.concurrent.locks.ReentrantReadWriteLock;\n\npublic class ExpressionGlobalVariables {\n\n\tprivate static Map variables = new HashMap<>();\n\n\tprivate static ReentrantReadWriteLock readWriteLock = new ReentrantReadWriteLock();\n\n\tpublic static void reset(Map map){\n\t\tLock lock = readWriteLock.writeLock();\n\t\tlock.lock();\n\t\ttry {\n\t\t\tvariables.clear();\n\t\t\tvariables.putAll(map);\n\t\t} finally {\n\t\t\tlock.unlock();\n\t\t}\n\t}\n\n\tpublic static Map getVariables(){\n\t\tLock lock = readWriteLock.readLock();\n\t\tlock.lock();\n\t\ttry {\n\t\t\treturn variables;\n\t\t} finally {\n\t\t\tlock.unlock();\n\t\t}\n\t}\n}\n"
},
{
"path": "spider-flow-core/src/main/java/org/spiderflow/core/expression/ExpressionTemplate.java",
"content": "\npackage org.spiderflow.core.expression;\n\nimport java.io.OutputStream;\nimport java.util.List;\n\nimport org.spiderflow.core.expression.interpreter.AstInterpreter;\nimport org.spiderflow.core.expression.parsing.Ast;\nimport org.spiderflow.core.expression.parsing.Ast.Node;\nimport org.spiderflow.core.expression.parsing.Parser;\n\n\n/** A template is loaded by a {@link TemplateLoader} from a file marked up with the basis-template language. The template can be\n * rendered to a {@link String} or {@link OutputStream} by calling one of the ![](\"https://www.spiderflow.org/images/logo.svg\"){kind=logo}
\r\n![](\"https://img.shields.io/badge/JDK-1.8+-green.svg\"){kind=icon}
\r\n ![](\"https://img.shields.io/badge/Docs-latest-blue.svg\"/){kind=icon}
\r\n ![](\"https://img.shields.io/github/v/release/ssssssss-team/spider-flow?logo=github\")
![](\"https://gitee.com/ssssssss-team/spider-flow/badge/star.svg?theme=white\"){kind=icon}
\r\n ![](\"https://img.shields.io/github/stars/ssssssss-team/spider-flow.svg?style=social\"/)
\r\n ![](\"https://img.shields.io/:license-MIT-blue.svg\")
\r\n ![](\"https://img.shields.io/badge/Join-QQGroup-blue\"){kind=icon}