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Add parser for annotations

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This commit is contained in:
Volker Berlin 2017-03-31 20:40:49 +02:00
parent ec1fc643c2
commit ec93b799b9
2 changed files with 231 additions and 138 deletions
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79
src/de/inetsoftware/classparser/Annotations.java Normal file
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@ -0,0 +1,79 @@
/*
* Copyright 2017 Volker Berlin (i-net software)
*
* 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 de.inetsoftware.classparser;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* @author Volker Berlin
*/
public class Annotations {
private final Map<String,Map<String,Object>> annotations = new HashMap<>();
/**
* Read the annotations structure.
* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.17
* @param input
* @param constantPool
* @throws IOException
*/
public Annotations( DataInputStream input, ConstantPool constantPool ) throws IOException {
int count = input.readUnsignedShort();
for( int i = 0; i < count; i++ ) {
String className = (String)constantPool.get( input.readUnsignedShort() );
className = className.substring( 1, className.length() - 1 ).replace( '/', '.' ); // has the form: "Lcom/package/ClassName;"
Map<String,Object> valuePairs = new HashMap<>();
annotations.put( className, valuePairs );
int valuePairCount = input.readUnsignedShort();
for( int p = 0; p < valuePairCount; p++ ) {
String key = (String)constantPool.get( input.readUnsignedShort() );
int type = input.readUnsignedByte();
Object value;
switch( type ) {
case 'B':
case 'C':
case 'D':
case 'F':
case 'I':
case 'J':
case 'S':
case 'Z':
case 's':
value = constantPool.get( input.readUnsignedShort() );
break;
default:
// TODO other possible values for type: e c @ [
throw new IOException( "Unknown annotation value type pool type: " + type );
}
valuePairs.put( key, value );
}
}
}
/**
* Get the key values of the annotation for the given class.
* @param className the class name of the annotation
* @return a map with the properties of the annotation or null if there is no annotation.
*/
public Map<String, Object> get( String className ) {
return annotations.get( className );
}
}

290
src/de/inetsoftware/classparser/MethodInfo.java
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@ -1,138 +1,152 @@
/*
Copyright 2011 - 2017 Volker Berlin (i-net software)
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 de.inetsoftware.classparser;
import java.io.DataInputStream;
import java.io.IOException;
import de.inetsoftware.classparser.Attributes.AttributeInfo;
/**
* @author Volker Berlin
*/
public class MethodInfo {
private final int accessFlags;
private final String name;
private final String description;
private final Attributes attributes;
private final ConstantPool constantPool;
private Code code;
private Exceptions exceptions;
/**
* Read the method_info structure
* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.6
* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#1513
*
* @param input
* @param constantPool
* @throws IOException
*/
MethodInfo( DataInputStream input, ConstantPool constantPool ) throws IOException {
this.accessFlags = input.readUnsignedShort();
this.name = (String)constantPool.get( input.readUnsignedShort() );
this.description = (String)constantPool.get( input.readUnsignedShort() );
this.constantPool = constantPool;
this.attributes = new Attributes( input, constantPool );
}
/**
* Get the access flags of the method.
* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.6-200-A
* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#1522
*
* @return the flags
*/
public int getAccessFlags() {
return accessFlags;
}
/**
* If the method is a static method.
* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.6-200-A
* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#1522
* @return true, if static
* @see #getAccessFlags()
*/
public boolean isStatic() {
return (accessFlags & 0x0008) > 0;
}
/**
* @return the name
*/
public String getName() {
return name;
}
/**
* @return the attributes
*/
public Attributes getAttributes() {
return attributes;
}
public Code getCode() throws IOException {
if( code != null ){
return code;
}
AttributeInfo data = attributes.get( "Code" );
if( data != null ) {
code = new Code( data.getDataInputStream(), constantPool );
}
return code;
}
/**
* Get the signature of the method without generic types.
*/
public String getDescription() {
return description;
}
/**
* Get the signature of the method with generic types.
*/
public String getSignature() throws IOException {
AttributeInfo info = getAttributes().get( "Signature" );
if( info != null ) {
int idx = info.getDataInputStream().readShort();
return (String)constantPool.get( idx );
} else {
return description;
}
}
public Exceptions getExceptions() throws IOException {
if( exceptions != null ) {
return exceptions;
}
AttributeInfo data = attributes.get( "Exceptions" );
if( data != null ) {
exceptions = new Exceptions( data.getDataInputStream(), constantPool );
}
return exceptions;
}
}
/*
Copyright 2011 - 2017 Volker Berlin (i-net software)
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 de.inetsoftware.classparser;
import java.io.DataInputStream;
import java.io.IOException;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import de.inetsoftware.classparser.Attributes.AttributeInfo;
/**
* @author Volker Berlin
*/
public class MethodInfo {
private final int accessFlags;
private final String name;
private final String description;
private final Attributes attributes;
private final ConstantPool constantPool;
private Code code;
private Exceptions exceptions;
/**
* Read the method_info structure
* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.6
* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#1513
*
* @param input
* @param constantPool
* @throws IOException
*/
MethodInfo( DataInputStream input, ConstantPool constantPool ) throws IOException {
this.accessFlags = input.readUnsignedShort();
this.name = (String)constantPool.get( input.readUnsignedShort() );
this.description = (String)constantPool.get( input.readUnsignedShort() );
this.constantPool = constantPool;
this.attributes = new Attributes( input, constantPool );
}
/**
* Get the access flags of the method.
* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.6-200-A
* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#1522
*
* @return the flags
*/
public int getAccessFlags() {
return accessFlags;
}
/**
* If the method is a static method.
* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.6-200-A
* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#1522
* @return true, if static
* @see #getAccessFlags()
*/
public boolean isStatic() {
return (accessFlags & 0x0008) > 0;
}
/**
* @return the name
*/
public String getName() {
return name;
}
/**
* @return the attributes
*/
public Attributes getAttributes() {
return attributes;
}
public Code getCode() throws IOException {
if( code != null ){
return code;
}
AttributeInfo data = attributes.get( "Code" );
if( data != null ) {
code = new Code( data.getDataInputStream(), constantPool );
}
return code;
}
/**
* Get the signature of the method without generic types.
*/
public String getDescription() {
return description;
}
/**
* Get the signature of the method with generic types.
*/
public String getSignature() throws IOException {
AttributeInfo info = getAttributes().get( "Signature" );
if( info != null ) {
int idx = info.getDataInputStream().readShort();
return (String)constantPool.get( idx );
} else {
return description;
}
}
public Exceptions getExceptions() throws IOException {
if( exceptions != null ) {
return exceptions;
}
AttributeInfo data = attributes.get( "Exceptions" );
if( data != null ) {
exceptions = new Exceptions( data.getDataInputStream(), constantPool );
}
return exceptions;
}
/**
* Get the annotations with @Retention(RetentionPolicy.CLASS)
* @return the annotations if there any exists else null
*/
public Annotations getRuntimeInvisibleAnnotations() throws IOException {
AttributeInfo data = attributes.get( "RuntimeInvisibleAnnotations" );
if( data != null ) {
return new Annotations( data.getDataInputStream(), constantPool );
}
return null;
}
}