init

2024-11-30 19:03:49 +08:00
commit 1e6763c160
3806 changed files with 737676 additions and 0 deletions
--- a/java/org/apache/tomcat/util/bcel/classfile/ElementValue.java
+++ b/java/org/apache/tomcat/util/bcel/classfile/ElementValue.java
@@ -0,0 +1,99 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.apache.tomcat.util.bcel.classfile;
+
+import java.io.DataInput;
+import java.io.IOException;
+
+public abstract class ElementValue
+{
+    private final int type;
+
+    private final ConstantPool cpool;
+
+
+    ElementValue(final int type, final ConstantPool cpool) {
+        this.type = type;
+        this.cpool = cpool;
+    }
+
+    public abstract String stringifyValue();
+
+    public static final byte STRING            = 's';
+    public static final byte ENUM_CONSTANT     = 'e';
+    public static final byte CLASS             = 'c';
+    public static final byte ANNOTATION        = '@';
+    public static final byte ARRAY             = '[';
+    public static final byte PRIMITIVE_INT     = 'I';
+    public static final byte PRIMITIVE_BYTE    = 'B';
+    public static final byte PRIMITIVE_CHAR    = 'C';
+    public static final byte PRIMITIVE_DOUBLE  = 'D';
+    public static final byte PRIMITIVE_FLOAT   = 'F';
+    public static final byte PRIMITIVE_LONG    = 'J';
+    public static final byte PRIMITIVE_SHORT   = 'S';
+    public static final byte PRIMITIVE_BOOLEAN = 'Z';
+
+    public static ElementValue readElementValue(final DataInput input, final ConstantPool cpool) throws IOException
+    {
+        final byte type = input.readByte();
+        switch (type)
+        {
+            case PRIMITIVE_BYTE:
+            case PRIMITIVE_CHAR:
+            case PRIMITIVE_DOUBLE:
+            case PRIMITIVE_FLOAT:
+            case PRIMITIVE_INT:
+            case PRIMITIVE_LONG:
+            case PRIMITIVE_SHORT:
+            case PRIMITIVE_BOOLEAN:
+            case STRING:
+                return new SimpleElementValue(type, input.readUnsignedShort(), cpool);
+
+            case ENUM_CONSTANT:
+                input.readUnsignedShort();    // Unused type_index
+                return new EnumElementValue(ENUM_CONSTANT, input.readUnsignedShort(), cpool);
+
+            case CLASS:
+                return new ClassElementValue(CLASS, input.readUnsignedShort(), cpool);
+
+            case ANNOTATION:
+                // TODO isRuntimeVisible
+                return new AnnotationElementValue(ANNOTATION, new AnnotationEntry(input, cpool), cpool);
+
+            case ARRAY:
+                final int numArrayVals = input.readUnsignedShort();
+                final ElementValue[] evalues = new ElementValue[numArrayVals];
+                for (int j = 0; j < numArrayVals; j++)
+                {
+                    evalues[j] = ElementValue.readElementValue(input, cpool);
+                }
+                return new ArrayElementValue(ARRAY, evalues, cpool);
+
+            default:
+                throw new ClassFormatException(
+                        "Unexpected element value kind in annotation: " + type);
+        }
+    }
+
+    final ConstantPool getConstantPool() {
+        return cpool;
+    }
+
+    final int getType() {
+        return type;
+    }
+}