尝试将值添加到 Map<String,Object> 时出现 Javassist CannotCompileException
Javassist CannotCompileException when trying to add values to a Map<String,Object>
您好，我正在尝试在检测过程中创建并填充类型地图。以前我用过地图，效果很好。但现在我想根据情况向该地图添加任何类型的值。因此，我编写了如下检测代码。
sBuilder.append("java.util.Map/*<String,Object>*/ ");
sBuilder.append(mapName);
sBuilder.append("= new java.util.HashMap/*<String,Object>*/();");
for (ParameterName parameter : insertMapList) {
sBuilder.append(mapName);
sBuilder.append(".put(\"");
sBuilder.append(parameter.getKey());
sBuilder.append("\",");
sBuilder.append(parameter.getParameterValue());
sBuilder.append(");");
}
我一直在尝试将值添加为 <"query_4",34>。但它抛出以下异常。
javassist.CannotCompileException: [source error] put(java.lang.String,int) not found in java.util.Map
at javassist.CtBehavior.insertBefore(CtBehavior.java:774)
at javassist.CtBehavior.insertBefore(CtBehavior.java:734)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.createInsertBefore(InstrumentationClassTransformer.java:179)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.instrumentMethod(InstrumentationClassTransformer.java:145)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.instrumentClass(InstrumentationClassTransformer.java:138)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.transform(InstrumentationClassTransformer.java:84)
at sun.instrument.TransformerManager.transform(TransformerManager.java:188)
at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:424)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:188)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClassHoldingLock(ClasspathManager.java:638)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClass(ClasspathManager.java:613)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findClassImpl(ClasspathManager.java:574)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClassImpl(ClasspathManager.java:492)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:465)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:395)
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:464)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at org.h2.Driver.connect(Driver.java:73)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:278)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:701)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:635)
at org.apache.tomcat.jdbc.pool.ConnectionPool.getConnection(ConnectionPool.java:188)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:128)
at org.wso2.carbon.user.core.claim.dao.ClaimDAO.getDialectCount(ClaimDAO.java:158)
at org.wso2.carbon.user.core.common.DefaultRealm.populateProfileAndClaimMaps(DefaultRealm.java:429)
at org.wso2.carbon.user.core.common.DefaultRealm.init(DefaultRealm.java:105)
at org.wso2.carbon.user.core.common.DefaultRealmService.initializeRealm(DefaultRealmService.java:262)
at org.wso2.carbon.user.core.common.DefaultRealmService.<init>(DefaultRealmService.java:99)
at org.wso2.carbon.user.core.common.DefaultRealmService.<init>(DefaultRealmService.java:112)
at org.wso2.carbon.user.core.internal.Activator.startDeploy(Activator.java:68)
at org.wso2.carbon.user.core.internal.BundleCheckActivator.start(BundleCheckActivator.java:61)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.run(BundleContextImpl.java:711)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
Caused by: compile error: put(java.lang.String,int) not found in java.util.Map
at javassist.compiler.TypeChecker.atMethodCallCore(TypeChecker.java:723)
at javassist.compiler.TypeChecker.atCallExpr(TypeChecker.java:688)
at javassist.compiler.JvstTypeChecker.atCallExpr(JvstTypeChecker.java:157)
at javassist.compiler.ast.CallExpr.accept(CallExpr.java:46)
at javassist.compiler.CodeGen.doTypeCheck(CodeGen.java:242)
at javassist.compiler.CodeGen.atStmnt(CodeGen.java:330)
at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)
at javassist.compiler.Javac.compileStmnt(Javac.java:569)
at javassist.CtBehavior.insertBefore(CtBehavior.java:754)
为什么我会收到此异常。据我了解，我们可以将任何类型的值添加到对象类型变量。但是为什么会抛出上面的异常呢？
正如 Jon Skeet 在上面的评论中提到的那样，您似乎需要将 int 框起来才能获得 Integer（这是 Object 的子类型）。您可以通过调用 Integer.valueOf(int) 来做到这一点。所以，我想改变这个：
sBuilder.append("\",");
sBuilder.append(parameter.getParameterValue());
sBuilder.append(");");
对此：
sBuilder.append("\", Integer.valueOf(");
sBuilder.append(parameter.getParameterValue());
sBuilder.append("));");
您好，我正在尝试在检测过程中创建并填充类型地图。以前我用过地图，效果很好。但现在我想根据情况向该地图添加任何类型的值。因此，我编写了如下检测代码。
sBuilder.append("java.util.Map/*<String,Object>*/ ");
sBuilder.append(mapName);
sBuilder.append("= new java.util.HashMap/*<String,Object>*/();");
for (ParameterName parameter : insertMapList) {
sBuilder.append(mapName);
sBuilder.append(".put(\"");
sBuilder.append(parameter.getKey());
sBuilder.append("\",");
sBuilder.append(parameter.getParameterValue());
sBuilder.append(");");
}
我一直在尝试将值添加为 <"query_4",34>。但它抛出以下异常。
javassist.CannotCompileException: [source error] put(java.lang.String,int) not found in java.util.Map
at javassist.CtBehavior.insertBefore(CtBehavior.java:774)
at javassist.CtBehavior.insertBefore(CtBehavior.java:734)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.createInsertBefore(InstrumentationClassTransformer.java:179)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.instrumentMethod(InstrumentationClassTransformer.java:145)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.instrumentClass(InstrumentationClassTransformer.java:138)
at org.wso2.das.javaagent.instrumentation.InstrumentationClassTransformer.transform(InstrumentationClassTransformer.java:84)
at sun.instrument.TransformerManager.transform(TransformerManager.java:188)
at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:424)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:188)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClassHoldingLock(ClasspathManager.java:638)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClass(ClasspathManager.java:613)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findClassImpl(ClasspathManager.java:574)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClassImpl(ClasspathManager.java:492)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:465)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:395)
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:464)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at org.h2.Driver.connect(Driver.java:73)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:278)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:701)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:635)
at org.apache.tomcat.jdbc.pool.ConnectionPool.getConnection(ConnectionPool.java:188)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:128)
at org.wso2.carbon.user.core.claim.dao.ClaimDAO.getDialectCount(ClaimDAO.java:158)
at org.wso2.carbon.user.core.common.DefaultRealm.populateProfileAndClaimMaps(DefaultRealm.java:429)
at org.wso2.carbon.user.core.common.DefaultRealm.init(DefaultRealm.java:105)
at org.wso2.carbon.user.core.common.DefaultRealmService.initializeRealm(DefaultRealmService.java:262)
at org.wso2.carbon.user.core.common.DefaultRealmService.<init>(DefaultRealmService.java:99)
at org.wso2.carbon.user.core.common.DefaultRealmService.<init>(DefaultRealmService.java:112)
at org.wso2.carbon.user.core.internal.Activator.startDeploy(Activator.java:68)
at org.wso2.carbon.user.core.internal.BundleCheckActivator.start(BundleCheckActivator.java:61)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.run(BundleContextImpl.java:711)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
Caused by: compile error: put(java.lang.String,int) not found in java.util.Map
at javassist.compiler.TypeChecker.atMethodCallCore(TypeChecker.java:723)
at javassist.compiler.TypeChecker.atCallExpr(TypeChecker.java:688)
at javassist.compiler.JvstTypeChecker.atCallExpr(JvstTypeChecker.java:157)
at javassist.compiler.ast.CallExpr.accept(CallExpr.java:46)
at javassist.compiler.CodeGen.doTypeCheck(CodeGen.java:242)
at javassist.compiler.CodeGen.atStmnt(CodeGen.java:330)
at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)
at javassist.compiler.Javac.compileStmnt(Javac.java:569)
at javassist.CtBehavior.insertBefore(CtBehavior.java:754)
为什么我会收到此异常。据我了解，我们可以将任何类型的值添加到对象类型变量。但是为什么会抛出上面的异常呢？
正如 Jon Skeet 在上面的评论中提到的那样，您似乎需要将 int 框起来才能获得 Integer（这是 Object 的子类型）。您可以通过调用 Integer.valueOf(int) 来做到这一点。所以，我想改变这个：
sBuilder.append("\",");
sBuilder.append(parameter.getParameterValue());
sBuilder.append(");");
对此：
sBuilder.append("\", Integer.valueOf(");
sBuilder.append(parameter.getParameterValue());
sBuilder.append("));");