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PMD is an extensible multilanguage static code analyzer. It finds common programming flaws like unused variables, empty catch blocks, unnecessary object creation, and so forth. It's mainly concerned with Java and Apex, but supports 16 other languages. It comes with 400+ built-in rules. It can be extended with custom rules. It uses JavaCC and Antlr to parse source files into abstract syntax trees (AST) and runs rules against them to find violations. Rules can be written in Java or using a XPath query. Currently, PMD supports Java, JavaScript, Salesforce.com Apex and Visualforce, Kotlin, Swift, Modelica, PLSQL, Apache Velocity, JSP, WSDL, Maven POM, HTML, XML and XSL. Scala is supported, but there are currently no Scala rules available. Additionally, it includes CPD, the copy-paste-detector. CPD finds duplicated code in Coco, C/C++, C#, Dart, Fortran, Gherkin, Go, Groovy, HTML, Java, JavaScript, JSP, Julia, Kotlin, Lua, Matlab, Modelica, Objective-C, Perl, PHP, PLSQL, Python, Ruby, Salesforce.com Apex and Visualforce, Scala, Swift, T-SQL, Typescript, Apache Velocity, WSDL, XML and XSL.

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/*
 * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
 */

package net.sourceforge.pmd.internal;

public final class SystemProps {

    public static final String PMD_ERROR_RECOVERY = "pmd.error_recovery";

    private SystemProps() {
    }

    /**
     * In error recovery mode errors like StackOverflowError or AssertionErrors are logged
     * and the execution continues.
     * These exceptions mean, that something went really wrong while executing and
     * depending on where the error occurred, the internal state might be corrupted
     * or not. Hence, it might work to continue and "ignore" (just log) the error
     * or we'll see more problems when continuing. That's why error recovery mode
     * is not enabled by default.
     * 
     * The System Property is called {@code pmd.error_recovery}.
     */
    public static boolean isErrorRecoveryMode() {
        return System.getProperty(PMD_ERROR_RECOVERY) != null;
    }
}