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parse InvokeDynamic constants
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src/de/inetsoftware/classparser/ConstantInvokeDynamic.java
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63
src/de/inetsoftware/classparser/ConstantInvokeDynamic.java
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@ -0,0 +1,63 @@
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/*
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Copyright 2019 Volker Berlin (i-net software)
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package de.inetsoftware.classparser;
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/**
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* @author Volker Berlin
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*/
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public class ConstantInvokeDynamic implements Member {
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private final ConstantNameAndType nameAndType;
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/**
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* Invoke dynamic info in the constant pool.
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* https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.4.10
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*
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* @param bootstrapMethodAttrIndex
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* a valid index into the bootstrap_methods array of the bootstrap method table
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* @param nameAndType
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* the name and type
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*/
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ConstantInvokeDynamic( int bootstrapMethodAttrIndex, ConstantNameAndType nameAndType ) {
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this.nameAndType = nameAndType;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public String getName() {
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return nameAndType.getName();
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public String getClassName() {
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return null;
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}
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/**
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* Get the type of the method. For example "(Ljava.lang.String;)I"
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*/
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@Override
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public String getType() {
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return nameAndType.getType();
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}
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}
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@ -27,8 +27,7 @@ public class ConstantPool {
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private final Object[] constantPool;
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/**
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* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.4
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* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#20080
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* https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.4
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*
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* @param input
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* the stream of the class
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@ -60,6 +59,7 @@ public class ConstantPool {
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break;
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case 7: //CONSTANT_Class
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case 8: //CONSTANT_String
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case 16: // CONSTANT_MethodType
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case 19: // CONSTANT_Module
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case 20: // CONSTANT_Package
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pool[i] = new int[] { type, input.readUnsignedShort() };
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@ -68,8 +68,12 @@ public class ConstantPool {
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case 10: //CONSTANT_Methodref
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case 11: //CONSTANT_InterfaceMethodref
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case 12: //CONSTANT_NameAndType
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case 18: // CONSTANT_InvokeDynamic
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pool[i] = new int[] { type, input.readUnsignedShort(), input.readUnsignedShort() };
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break;
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case 15: // CONSTANT_MethodHandle
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pool[i] = new int[] { type, input.readUnsignedByte(), input.readUnsignedShort() };
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break;
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default:
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throw new IOException( "Unknown constant pool type: " + type );
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}
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@ -85,7 +89,8 @@ public class ConstantPool {
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case 7: //CONSTANT_Class
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pool[i] = new ConstantClass( (String)pool[data[1]] );
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break;
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case 8: //CONSTANT_String
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case 8: // CONSTANT_String
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case 16: // CONSTANT_MethodType
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case 19: // CONSTANT_Module
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case 20: // CONSTANT_Package
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pool[i] = pool[data[1]];
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@ -114,6 +119,12 @@ public class ConstantPool {
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case 12: //CONSTANT_NameAndType
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pool[i] = new ConstantNameAndType( (String)pool[data[1]], (String)pool[data[2]] );
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break;
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case 15: // CONSTANT_MethodHandle
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pool[i] = pool[data[2]];
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break;
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case 18: // CONSTANT_InvokeDynamic
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pool[i] = new ConstantInvokeDynamic( data[1], (ConstantNameAndType)pool[data[2]] );
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break;
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default:
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throw new IOException( "Unknown constant pool type: " + data[0] );
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}
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