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Diffstat (limited to 'src/proguard/classfile/editor/AttributesEditor.java')
| -rw-r--r-- | src/proguard/classfile/editor/AttributesEditor.java | 314 |
1 files changed, 0 insertions, 314 deletions
diff --git a/src/proguard/classfile/editor/AttributesEditor.java b/src/proguard/classfile/editor/AttributesEditor.java deleted file mode 100644 index ce38a6b..0000000 --- a/src/proguard/classfile/editor/AttributesEditor.java +++ /dev/null @@ -1,314 +0,0 @@ -/* - * ProGuard -- shrinking, optimization, obfuscation, and preverification - * of Java bytecode. - * - * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -package proguard.classfile.editor; - -import proguard.classfile.*; -import proguard.classfile.attribute.*; - -/** - * This class can add and delete attributes to and from classes, fields, - * methods, and code attributes. Attributes to be added must be filled out - * beforehand, including their references to the constant pool. Existing - * attributes of the same type are always replaced. - * - * @author Eric Lafortune - */ -public class AttributesEditor -{ - private final ProgramClass targetClass; - private final ProgramMember targetMember; - private final CodeAttribute targetAttribute; - private final boolean replaceAttributes; - - - /** - * Creates a new AttributeAdder that will edit attributes in the given - * target class. - */ - public AttributesEditor(ProgramClass targetClass, - boolean replaceAttributes) - { - this(targetClass, null, null, replaceAttributes); - } - - - /** - * Creates a new AttributeAdder that will edit attributes in the given - * target class member. - */ - public AttributesEditor(ProgramClass targetClass, - ProgramMember targetMember, - boolean replaceAttributes) - { - this(targetClass, targetMember, null, replaceAttributes); - } - - - /** - * Creates a new AttributeAdder that will edit attributes in the given - * target code attribute. - */ - public AttributesEditor(ProgramClass targetClass, - ProgramMember targetMember, - CodeAttribute targetAttribute, - boolean replaceAttributes) - { - this.targetClass = targetClass; - this.targetMember = targetMember; - this.targetAttribute = targetAttribute; - this.replaceAttributes = replaceAttributes; - } - - - /** - * Finds the specified attribute in the target. - */ - public Attribute findAttribute(String attributeName) - { - // What's the target? - return - targetAttribute != null ? - findAttribute(targetAttribute.u2attributesCount, - targetAttribute.attributes, - attributeName) : - targetMember != null ? - findAttribute(targetMember.u2attributesCount, - targetMember.attributes, - attributeName) : - findAttribute(targetClass.u2attributesCount, - targetClass.attributes, - attributeName); - } - - - /** - * Adds the given attribute to the target. - */ - public void addAttribute(Attribute attribute) - { - // What's the target? - if (targetAttribute != null) - { - // Try to replace an existing attribute. - if (!replaceAttributes || - !replaceAttribute(targetAttribute.u2attributesCount, - targetAttribute.attributes, - attribute)) - { - // Otherwise append the attribute. - targetAttribute.attributes = - addAttribute(targetAttribute.u2attributesCount, - targetAttribute.attributes, - attribute); - - targetAttribute.u2attributesCount++; - } - } - else if (targetMember != null) - { - // Try to replace an existing attribute. - if (!replaceAttributes || - !replaceAttribute(targetMember.u2attributesCount, - targetMember.attributes, - attribute)) - { - // Otherwise append the attribute. - targetMember.attributes = - addAttribute(targetMember.u2attributesCount, - targetMember.attributes, - attribute); - - targetMember.u2attributesCount++; - } - } - else - { - // Try to replace an existing attribute. - if (!replaceAttributes || - !replaceAttribute(targetClass.u2attributesCount, - targetClass.attributes, - attribute)) - { - // Otherwise append the attribute. - targetClass.attributes = - addAttribute(targetClass.u2attributesCount, - targetClass.attributes, - attribute); - - targetClass.u2attributesCount++; - } - } - } - - - /** - * Deletes the specified attribute from the target. - */ - public void deleteAttribute(String attributeName) - { - // What's the target? - if (targetAttribute != null) - { - targetAttribute.u2attributesCount = - deleteAttribute(targetAttribute.u2attributesCount, - targetAttribute.attributes, - attributeName); - } - else if (targetMember != null) - { - targetMember.u2attributesCount = - deleteAttribute(targetMember.u2attributesCount, - targetMember.attributes, - attributeName); - } - else - { - targetClass.u2attributesCount = - deleteAttribute(targetClass.u2attributesCount, - targetClass.attributes, - attributeName); - } - } - - - // Small utility methods. - - /** - * Tries to put the given attribute in place of an existing attribute of - * the same name, returning whether it was present. - */ - private boolean replaceAttribute(int attributesCount, - Attribute[] attributes, - Attribute attribute) - { - // Find the attribute with the same name. - int index = findAttributeIndex(attributesCount, - attributes, - attribute.getAttributeName(targetClass)); - if (index < 0) - { - return false; - } - - attributes[index] = attribute; - - return true; - } - - - /** - * Appends the given attribute to the given array of attributes, creating a - * new array if necessary. - */ - private Attribute[] addAttribute(int attributesCount, - Attribute[] attributes, - Attribute attribute) - { - // Is the array too small to contain the additional attribute? - if (attributes.length <= attributesCount) - { - // Create a new array and copy the attributes into it. - Attribute[] newAttributes = new Attribute[attributesCount + 1]; - System.arraycopy(attributes, 0, - newAttributes, 0, - attributesCount); - attributes = newAttributes; - } - - // Append the attribute. - attributes[attributesCount] = attribute; - - return attributes; - } - - - /** - * Deletes the attributes with the given name from the given array of - * attributes, returning the new number of attributes. - */ - private int deleteAttribute(int attributesCount, - Attribute[] attributes, - String attributeName) - { - // Find the attribute. - int index = findAttributeIndex(attributesCount, - attributes, - attributeName); - if (index < 0) - { - return attributesCount; - } - - // Shift the other attributes in the array. - System.arraycopy(attributes, index + 1, - attributes, index, - attributesCount - index - 1); - - // Clear the last entry in the array. - attributes[--attributesCount] = null; - - return attributesCount; - } - - - /** - * Finds the index of the attribute with the given name in the given - * array of attributes. - */ - private int findAttributeIndex(int attributesCount, - Attribute[] attributes, - String attributeName) - { - for (int index = 0; index < attributesCount; index++) - { - Attribute attribute = attributes[index]; - - if (attribute.getAttributeName(targetClass).equals(attributeName)) - { - return index; - } - } - - return -1; - } - - - /** - * Finds the attribute with the given name in the given - * array of attributes. - */ - private Attribute findAttribute(int attributesCount, - Attribute[] attributes, - String attributeName) - { - for (int index = 0; index < attributesCount; index++) - { - Attribute attribute = attributes[index]; - - if (attribute.getAttributeName(targetClass).equals(attributeName)) - { - return attribute; - } - } - - return null; - } -} |