guru.nidi.codeassert.model.AttributeInfo Maven / Gradle / Ivy
/*
* Copyright © 2015 Stefan Niederhauser ([email protected])
*
* 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 guru.nidi.codeassert.model;
import java.io.DataInputStream;
import java.io.IOException;
final class AttributeInfo {
final String name;
final byte[] value;
private AttributeInfo(String name, byte[] value) {
this.name = name;
this.value = value;
}
static AttributeInfo fromData(DataInputStream in, ConstantPool constantPool) throws IOException {
final String name = constantPool.getUtf8(in.readUnsignedShort());
final int attributeLength = in.readInt();
final byte[] value = new byte[attributeLength];
for (int b = 0; b < attributeLength; b++) {
value[b] = in.readByte();
}
return new AttributeInfo(name, value);
}
boolean isAnnotation() {
return "RuntimeVisibleAnnotations".equals(name) || "RuntimeInvisibleAnnotations".equals(name);
}
boolean isSignature() {
return "Signature".equals(name);
}
boolean isSource() {
return "SourceFile".equals(name);
}
boolean isCode() {
return "Code".equals(name);
}
String sourceFile(ConstantPool constantPool) throws IOException {
final int b0 = value[0] < 0 ? value[0] + 256 : value[0];
final int b1 = value[1] < 0 ? value[1] + 256 : value[1];
final int pe = b0 * 256 + b1;
return constantPool.getUtf8(pe);
}
int u2(int index) {
return (value[index] << 8 & 0xFF00) | (value[index + 1] & 0xFF);
}
}