diff options
Diffstat (limited to 'src/main/java/com/amazon/carbonado/util/AnnotationDescPrinter.java')
| -rw-r--r-- | src/main/java/com/amazon/carbonado/util/AnnotationDescPrinter.java | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/src/main/java/com/amazon/carbonado/util/AnnotationDescPrinter.java b/src/main/java/com/amazon/carbonado/util/AnnotationDescPrinter.java new file mode 100644 index 0000000..4f80911 --- /dev/null +++ b/src/main/java/com/amazon/carbonado/util/AnnotationDescPrinter.java @@ -0,0 +1,281 @@ +/*
+ * Copyright 2006 Amazon Technologies, Inc. or its affiliates.
+ * Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
+ * of Amazon Technologies, Inc. or its affiliates. All rights reserved.
+ *
+ * Licensed 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 com.amazon.carbonado.util;
+
+import java.lang.annotation.Annotation;
+
+import org.cojen.classfile.TypeDesc;
+
+/**
+ * Prints machine readable, self-describing, annotation descriptors.
+ *
+ * @author Brian S O'Neill
+ * @see AnnotationDescParser
+ */
+public class AnnotationDescPrinter extends AnnotationVisitor<Object, Object> {
+ /**
+ * Returns an annotation descriptor that has no parameters.
+ */
+ public static String makePlainDescriptor(Class<? extends Annotation> annotationType) {
+ return "" + TAG_ANNOTATION + TypeDesc.forClass(annotationType).getDescriptor();
+ }
+
+ /**
+ * Returns an annotation descriptor that has no parameters.
+ */
+ public static String makePlainDescriptor(String annotationType) {
+ return "" + TAG_ANNOTATION + TAG_OBJECT + annotationType.replace('.', '/') + ';';
+ }
+
+ static final char
+ TAG_BOOLEAN = 'Z',
+ TAG_BYTE = 'B',
+ TAG_SHORT = 'S',
+ TAG_CHAR = 'C',
+ TAG_INT = 'I',
+ TAG_LONG = 'J',
+ TAG_FLOAT = 'F',
+ TAG_DOUBLE = 'D',
+ TAG_VOID = 'V',
+ TAG_OBJECT = 'L',
+ TAG_ARRAY = '[',
+ TAG_STRING = 's',
+ TAG_CLASS = 'c',
+ TAG_ENUM = 'e',
+ TAG_ANNOTATION = '@';
+
+ private final StringBuilder mBuilder;
+
+ /**
+ * @param sort when true, sort annotation members by name (case sensitive)
+ * @param b StringBuilder to get printed results
+ */
+ public AnnotationDescPrinter(boolean sort, StringBuilder b) {
+ super(sort);
+ mBuilder = b;
+ }
+
+ /**
+ * Prints the annotation to the builder passed to the constructor.
+ *
+ * @param value Annotation to visit
+ * @return null
+ */
+ public Object visit(Annotation value) {
+ return visit(value, null);
+ }
+
+ public Object visit(String name, int pos, Annotation value, Object param) {
+ if (appendName(name, pos, TAG_ANNOTATION)) {
+ mBuilder.append(TypeDesc.forClass(value.annotationType()).getDescriptor());
+ }
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, int value, Object param) {
+ appendName(name, pos, TAG_INT);
+ mBuilder.append(value);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, long value, Object param) {
+ appendName(name, pos, TAG_LONG);
+ mBuilder.append(value);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, float value, Object param) {
+ appendName(name, pos, TAG_FLOAT);
+ mBuilder.append(Float.toString(value));
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, double value, Object param) {
+ appendName(name, pos, TAG_DOUBLE);
+ mBuilder.append(Double.toString(value));
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, boolean value, Object param) {
+ appendName(name, pos, TAG_BOOLEAN);
+ mBuilder.append(value ? '1' : '0');
+ return null;
+ }
+
+ public Object visit(String name, int pos, byte value, Object param) {
+ appendName(name, pos, TAG_BYTE);
+ mBuilder.append(value);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, short value, Object param) {
+ appendName(name, pos, TAG_SHORT);
+ mBuilder.append(value);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, char value, Object param) {
+ appendName(name, pos, TAG_CHAR);
+ mBuilder.append(value);
+ return null;
+ }
+
+ public Object visit(String name, int pos, String value, Object param) {
+ appendName(name, pos, TAG_STRING);
+ int length = value.length();
+ for (int i=0; i<length; i++) {
+ char c = value.charAt(i);
+ if (c == '\\' || c == ';') {
+ mBuilder.append('\\');
+ }
+ mBuilder.append(c);
+ }
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, Class value, Object param) {
+ appendName(name, pos, TAG_CLASS);
+ if (value == String.class) {
+ mBuilder.append(TAG_STRING);
+ } else if (value == Class.class) {
+ mBuilder.append(TAG_CLASS);
+ } else {
+ mBuilder.append(TypeDesc.forClass(value).getDescriptor());
+ }
+ return null;
+ }
+
+ public Object visit(String name, int pos, Enum value, Object param) {
+ if (appendName(name, pos, TAG_ENUM)) {
+ mBuilder.append(value.getDeclaringClass().getName());
+ mBuilder.append('.');
+ }
+ mBuilder.append(value.name());
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, Annotation[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, int[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, long[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, float[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, double[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, boolean[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, byte[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, short[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, char[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, String[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, Class[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ public Object visit(String name, int pos, Enum[] value, Object param) {
+ appendName(name, pos, TAG_ARRAY);
+ super.visit(name, pos, value, param);
+ mBuilder.append(';');
+ return null;
+ }
+
+ /**
+ * @return true if tag was appended too
+ */
+ private boolean appendName(String name, int pos, char tag) {
+ if (name != null) {
+ mBuilder.append(name);
+ mBuilder.append('=');
+ }
+ if (name != null || pos == 0) {
+ mBuilder.append(tag);
+ return true;
+ }
+ return false;
+ }
+}
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