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POException while generating AST using Eclipse JDT SDK in a non-eclipse environment
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  1. POException while generating AST using Eclipse JDT SDK in a non-eclipse environment
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    copied!<p>I'm trying to use the jdt's AST generation feature in a non-eclipse environment(as a plugin for another basic java ide). My program creates the AST correctly when I run it inside eclipse, but when I test the plugin it from the ide I get this exception:</p> <pre><code>Exception in thread "AWT-EventQueue-0" java.lang.NoSuchFieldError: ignoreMethodBodies at org.eclipse.jdt.core.dom.CompilationUnitResolver.parse(CompilationUnitResolver.java:491) at org.eclipse.jdt.core.dom.ASTParser.internalCreateAST(ASTParser.java:1200) at org.eclipse.jdt.core.dom.ASTParser.createAST(ASTParser.java :807) at mytreetest.TreeMaker.buildTree(Unknown Source) ... (further stack trace) ... </code></pre> <p>The code I've used is quite basic:</p> <p>Code:</p> <pre><code>ASTParser parser = ASTParser.newParser(AST.JLS4); String src = readFile(filePath); parser.setSource(src.toCharArray()); parser.setKind(ASTParser.K_COMPILATION_UNIT); Map&lt;String, String&gt; options = JavaCore.getOptions(); JavaCore.setComplianceOptions(JavaCore.VERSION_1_7, options); parser.setCompilerOptions(options); CompilationUnit cu = (CompilationUnit) parser.createAST(null); </code></pre> <p>I went through the source code of org.eclipse.jdt.core.dom.CompilationUnitResolver and org.eclipse.jdt.internal.compiler.impl.CompilerOptions. CompilerOptions does have a public boolean field called ignoreMethodBodies.</p> <p>What can be causing this error?</p> <p>Please help me out.</p> <p>Here are the eclipse jar files I've included :</p> <pre><code>org.eclipse.core.contenttype_3.4.100.v20110423-0524.jar org.eclipse.core.jobs_3.5.100.v20110404.jar org.eclipse.core.resources_3.7100.v20110510-0712.jar org.eclipse.core.runtime_3.7.O.v20110110.jar org.eclipse.equinoxcommon_3.6.O.v20110523.jar org.eclipse.equinox.preferences_3.4.1.R37x_v20110725.jar org.eclipse.jdt.compiler.apt_1.O.400.v0110816-0800.jar org.eclipse.jdt.compiler.tooLl.O.100.v_B76_R37x.jar org.edipse.jdt.core_3.7.1.v_B76_R37x.jar org.eclipse.jface3.7.0J20110522-1430.jar org.eclipse.osgi_3.7.1.R37x_v20110808-1106.jar org.eclipse.osgi.utiL3.2.200.v20110110.jar org.eclipse.text3.5101 .r371y20110810-O800jar </code></pre> <p><strong>UPDATE:</strong></p> <p>I've found the fix for this. The java-ide from which I was running this code was using ecj. The problem was that ecj.jar was clashing with the jdt-core modules I'd included with my plugin. Replacing the ide's ecj with jdt-core(org.eclipse.jdt.core_XX.XX.jar and the rest of the jars) and updating its classpath solved the problem.</p>
 

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