| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.impl.services.bytecode.GClass |
| 4 | |
| 5 | Copyright 1998, 2004 The Apache Software Foundation or its licensors, as applicable. |
| 6 | |
| 7 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | you may not use this file except in compliance with the License. |
| 9 | You may obtain a copy of the License at |
| 10 | |
| 11 | http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | |
| 13 | Unless required by applicable law or agreed to in writing, software |
| 14 | distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | See the License for the specific language governing permissions and |
| 17 | limitations under the License. |
| 18 | |
| 19 | */ |
| 20 | |
| 21 | package org.apache.derby.impl.services.bytecode; |
| 22 | |
| 23 | import org.apache.derby.iapi.services.compiler.ClassBuilder; |
| 24 | import org.apache.derby.iapi.services.loader.ClassFactory; |
| 25 | import org.apache.derby.iapi.services.loader.GeneratedClass; |
| 26 | import org.apache.derby.iapi.error.StandardException; |
| 27 | import org.apache.derby.iapi.services.sanity.SanityManager; |
| 28 | import org.apache.derby.iapi.services.stream.HeaderPrintWriter; |
| 29 | import org.apache.derby.iapi.services.monitor.Monitor; |
| 30 | |
| 31 | import org.apache.derby.iapi.util.ByteArray; |
| 32 | |
| 33 | import java.io.File; |
| 34 | import java.io.FileOutputStream; |
| 35 | import java.io.IOException; |
| 36 | |
| 37 | /** |
| 38 | * This is a common superclass for the various impls. |
| 39 | * Saving class files is a common thing to do. |
| 40 | * |
| 41 | * @author ames |
| 42 | */ |
| 43 | public abstract class GClass implements ClassBuilder { |
| 44 | |
| 45 | protected ByteArray bytecode; |
| 46 | protected final ClassFactory cf; |
| 47 | protected final String qualifiedName; |
| 48 | |
| 49 | |
| 50 | |
| 51 | public GClass(ClassFactory cf, String qualifiedName) { |
| 52 | this.cf = cf; |
| 53 | this.qualifiedName = qualifiedName; |
| 54 | } |
| 55 | public String getFullName() { |
| 56 | return qualifiedName; |
| 57 | } |
| 58 | public GeneratedClass getGeneratedClass() throws StandardException { |
| 59 | return cf.loadGeneratedClass(qualifiedName, getClassBytecode()); |
| 60 | } |
| 61 | |
| 62 | protected void writeClassFile(String dir, boolean logMessage, Throwable t) |
| 63 | throws StandardException { |
| 64 | |
| 65 | if (SanityManager.DEBUG) { |
| 66 | |
| 67 | if (bytecode == null) getClassBytecode(); // not recursing... |
| 68 | |
| 69 | if (dir == null) dir=""; |
| 70 | |
| 71 | String filename = getName(); // leave off package |
| 72 | |
| 73 | filename = filename + ".class"; |
| 74 | |
| 75 | File classFile = new File(dir,filename); |
| 76 | |
| 77 | // find the error stream |
| 78 | HeaderPrintWriter errorStream = Monitor.getStream(); |
| 79 | |
| 80 | try { |
| 81 | FileOutputStream fis = new FileOutputStream(classFile); |
| 82 | fis.write(bytecode.getArray(), |
| 83 | bytecode.getOffset(), bytecode.getLength()); |
| 84 | fis.flush(); |
| 85 | if (logMessage) { |
| 86 | errorStream.printlnWithHeader("Wrote class "+getFullName()+" to file "+classFile.toString()+". Please provide support with the file and the following exception message: "+t); |
| 87 | } |
| 88 | fis.close(); |
| 89 | } catch (IOException e) { |
| 90 | if (SanityManager.DEBUG) |
| 91 | SanityManager.THROWASSERT("Unable to write .class file"); |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | public final void validateType(String typeName1) |
| 97 | { |
| 98 | if (SanityManager.DEBUG) |
| 99 | { |
| 100 | SanityManager.ASSERT(typeName1 != null); |
| 101 | |
| 102 | String typeName = typeName1.trim(); |
| 103 | |
| 104 | // first remove all array-ness |
| 105 | while (typeName.endsWith("[]")) typeName = typeName.substring(0,typeName.length()-2); |
| 106 | |
| 107 | SanityManager.ASSERT(typeName.length() > 0); |
| 108 | |
| 109 | // then check for primitive types |
| 110 | if ("boolean".equals(typeName)) return; |
| 111 | if ("byte".equals(typeName)) return; |
| 112 | if ("char".equals(typeName)) return; |
| 113 | if ("double".equals(typeName)) return; |
| 114 | if ("float".equals(typeName)) return; |
| 115 | if ("int".equals(typeName)) return; |
| 116 | if ("long".equals(typeName)) return; |
| 117 | if ("short".equals(typeName)) return; |
| 118 | if ("void".equals(typeName)) return; |
| 119 | |
| 120 | // then see if it can be found |
| 121 | // REVISIT: this will fail if ASSERT is on and the |
| 122 | // implementation at hand is missing the target type. |
| 123 | // We do plan to generate classes against |
| 124 | // different implementations from the compiler's implementation |
| 125 | // at some point... |
| 126 | try { |
| 127 | if (cf == null) |
| 128 | Class.forName(typeName); |
| 129 | else |
| 130 | cf.loadApplicationClass(typeName); |
| 131 | } catch (ClassNotFoundException cnfe) { |
| 132 | SanityManager.THROWASSERT("Class "+typeName+" not found"); |
| 133 | } |
| 134 | |
| 135 | // all the checks succeeded, it must be okay. |
| 136 | return; |
| 137 | } |
| 138 | } |
| 139 | } |