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Apache BCEL Source Code Files
Apache BCEL Source Code Files are inside the Apache BCEL source package file like bcel-6.6.1-src.zip. Unzip the source package file and go to the "src/main" sub-directory, you will see source code files.
Here is the list of Java source code files of the Apache BCEL 6.6.1 in \Users\fyicenter\bcel-6.6.1\src:
✍: FYIcenter
⏎ org/apache/bcel/classfile/StackMapEntry.java
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 org.apache.bcel.classfile; import java.io.DataInput; import java.io.DataOutputStream; import java.io.IOException; import java.util.Arrays; import org.apache.bcel.Const; /** * This class represents a stack map entry recording the types of local variables and the of stack items at a given * byte code offset. See CLDC specification 5.3.1.2 * * @see StackMap * @see StackMapType */ public final class StackMapEntry implements Node, Cloneable { /** * Empty array. */ private static final StackMapType[] EMPTY_STACK_MAP_TYPE_ARRAY = {}; private int frameType; private int byteCodeOffset; private StackMapType[] typesOfLocals; private StackMapType[] typesOfStackItems; private ConstantPool constantPool; /** * Construct object from input stream. * * @param input Input stream * @throws IOException if an I/O error occurs. */ StackMapEntry(final DataInput input, final ConstantPool constantPool) throws IOException { this(input.readByte() & 0xFF, -1, null, null, constantPool); if (frameType >= Const.SAME_FRAME && frameType <= Const.SAME_FRAME_MAX) { byteCodeOffset = frameType - Const.SAME_FRAME; } else if (frameType >= Const.SAME_LOCALS_1_STACK_ITEM_FRAME && frameType <= Const.SAME_LOCALS_1_STACK_ITEM_FRAME_MAX) { byteCodeOffset = frameType - Const.SAME_LOCALS_1_STACK_ITEM_FRAME; typesOfStackItems = new StackMapType[1]; typesOfStackItems[0] = new StackMapType(input, constantPool); } else if (frameType == Const.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED) { byteCodeOffset = input.readShort(); typesOfStackItems = new StackMapType[1]; typesOfStackItems[0] = new StackMapType(input, constantPool); } else if (frameType >= Const.CHOP_FRAME && frameType <= Const.CHOP_FRAME_MAX) { byteCodeOffset = input.readShort(); } else if (frameType == Const.SAME_FRAME_EXTENDED) { byteCodeOffset = input.readShort(); } else if (frameType >= Const.APPEND_FRAME && frameType <= Const.APPEND_FRAME_MAX) { byteCodeOffset = input.readShort(); final int numberOfLocals = frameType - 251; typesOfLocals = new StackMapType[numberOfLocals]; for (int i = 0; i < numberOfLocals; i++) { typesOfLocals[i] = new StackMapType(input, constantPool); } } else if (frameType == Const.FULL_FRAME) { byteCodeOffset = input.readShort(); final int numberOfLocals = input.readShort(); typesOfLocals = new StackMapType[numberOfLocals]; for (int i = 0; i < numberOfLocals; i++) { typesOfLocals[i] = new StackMapType(input, constantPool); } final int numberOfStackItems = input.readShort(); typesOfStackItems = new StackMapType[numberOfStackItems]; for (int i = 0; i < numberOfStackItems; i++) { typesOfStackItems[i] = new StackMapType(input, constantPool); } } else { /* Can't happen */ throw new ClassFormatException("Invalid frame type found while parsing stack map table: " + frameType); } } /** * DO NOT USE * * @param byteCodeOffset * @param numberOfLocals NOT USED * @param typesOfLocals array of {@link StackMapType}s of locals * @param numberOfStackItems NOT USED * @param typesOfStackItems array ot {@link StackMapType}s of stack items * @param constantPool the constant pool * @deprecated Since 6.0, use {@link #StackMapEntry(int, int, StackMapType[], StackMapType[], ConstantPool)} instead */ @java.lang.Deprecated public StackMapEntry(final int byteCodeOffset, final int numberOfLocals, final StackMapType[] typesOfLocals, final int numberOfStackItems, final StackMapType[] typesOfStackItems, final ConstantPool constantPool) { this.byteCodeOffset = byteCodeOffset; this.typesOfLocals = typesOfLocals != null ? typesOfLocals : EMPTY_STACK_MAP_TYPE_ARRAY; this.typesOfStackItems = typesOfStackItems != null ? typesOfStackItems : EMPTY_STACK_MAP_TYPE_ARRAY; this.constantPool = constantPool; if (numberOfLocals < 0) { throw new IllegalArgumentException("numberOfLocals < 0"); } if (numberOfStackItems < 0) { throw new IllegalArgumentException("numberOfStackItems < 0"); } } /** * Create an instance * * @param tag the frameType to use * @param byteCodeOffset * @param typesOfLocals array of {@link StackMapType}s of locals * @param typesOfStackItems array ot {@link StackMapType}s of stack items * @param constantPool the constant pool */ public StackMapEntry(final int tag, final int byteCodeOffset, final StackMapType[] typesOfLocals, final StackMapType[] typesOfStackItems, final ConstantPool constantPool) { this.frameType = tag; this.byteCodeOffset = byteCodeOffset; this.typesOfLocals = typesOfLocals != null ? typesOfLocals : EMPTY_STACK_MAP_TYPE_ARRAY; this.typesOfStackItems = typesOfStackItems != null ? typesOfStackItems : EMPTY_STACK_MAP_TYPE_ARRAY; this.constantPool = constantPool; } /** * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class. * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects. * * @param v Visitor object */ @Override public void accept(final Visitor v) { v.visitStackMapEntry(this); } /** * @return deep copy of this object */ public StackMapEntry copy() { StackMapEntry e; try { e = (StackMapEntry) clone(); } catch (final CloneNotSupportedException ex) { throw new Error("Clone Not Supported"); } e.typesOfLocals = new StackMapType[typesOfLocals.length]; Arrays.setAll(e.typesOfLocals, i -> typesOfLocals[i].copy()); e.typesOfStackItems = new StackMapType[typesOfStackItems.length]; Arrays.setAll(e.typesOfStackItems, i -> typesOfStackItems[i].copy()); return e; } /** * Dump stack map entry * * @param file Output file stream * @throws IOException if an I/O error occurs. */ public void dump(final DataOutputStream file) throws IOException { file.write(frameType); if (frameType >= Const.SAME_LOCALS_1_STACK_ITEM_FRAME && frameType <= Const.SAME_LOCALS_1_STACK_ITEM_FRAME_MAX) { typesOfStackItems[0].dump(file); } else if (frameType == Const.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED) { file.writeShort(byteCodeOffset); typesOfStackItems[0].dump(file); } else if (frameType >= Const.CHOP_FRAME && frameType <= Const.CHOP_FRAME_MAX) { file.writeShort(byteCodeOffset); } else if (frameType == Const.SAME_FRAME_EXTENDED) { file.writeShort(byteCodeOffset); } else if (frameType >= Const.APPEND_FRAME && frameType <= Const.APPEND_FRAME_MAX) { file.writeShort(byteCodeOffset); for (final StackMapType type : typesOfLocals) { type.dump(file); } } else if (frameType == Const.FULL_FRAME) { file.writeShort(byteCodeOffset); file.writeShort(typesOfLocals.length); for (final StackMapType type : typesOfLocals) { type.dump(file); } file.writeShort(typesOfStackItems.length); for (final StackMapType type : typesOfStackItems) { type.dump(file); } } else if (!(frameType >= Const.SAME_FRAME && frameType <= Const.SAME_FRAME_MAX)) { /* Can't happen */ throw new ClassFormatException("Invalid Stack map table tag: " + frameType); } } public int getByteCodeOffset() { return byteCodeOffset; } /** * @return Constant pool used by this object. */ public ConstantPool getConstantPool() { return constantPool; } public int getFrameType() { return frameType; } /** * Calculate stack map entry size * */ int getMapEntrySize() { if (frameType >= Const.SAME_FRAME && frameType <= Const.SAME_FRAME_MAX) { return 1; } if (frameType >= Const.SAME_LOCALS_1_STACK_ITEM_FRAME && frameType <= Const.SAME_LOCALS_1_STACK_ITEM_FRAME_MAX) { return 1 + (typesOfStackItems[0].hasIndex() ? 3 : 1); } if (frameType == Const.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED) { return 3 + (typesOfStackItems[0].hasIndex() ? 3 : 1); } if (frameType >= Const.CHOP_FRAME && frameType <= Const.CHOP_FRAME_MAX || frameType == Const.SAME_FRAME_EXTENDED) { return 3; } if (frameType >= Const.APPEND_FRAME && frameType <= Const.APPEND_FRAME_MAX) { int len = 3; for (final StackMapType typesOfLocal : typesOfLocals) { len += typesOfLocal.hasIndex() ? 3 : 1; } return len; } if (frameType != Const.FULL_FRAME) { throw new IllegalStateException("Invalid StackMap frameType: " + frameType); } int len = 7; for (final StackMapType typesOfLocal : typesOfLocals) { len += typesOfLocal.hasIndex() ? 3 : 1; } for (final StackMapType typesOfStackItem : typesOfStackItems) { len += typesOfStackItem.hasIndex() ? 3 : 1; } return len; } public int getNumberOfLocals() { return typesOfLocals.length; } public int getNumberOfStackItems() { return typesOfStackItems.length; } public StackMapType[] getTypesOfLocals() { return typesOfLocals; } public StackMapType[] getTypesOfStackItems() { return typesOfStackItems; } private boolean invalidFrameType(final int f) { // @formatter:off return f != Const.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED && !(f >= Const.CHOP_FRAME && f <= Const.CHOP_FRAME_MAX) && f != Const.SAME_FRAME_EXTENDED && !(f >= Const.APPEND_FRAME && f <= Const.APPEND_FRAME_MAX) && f != Const.FULL_FRAME; // @formatter:on } public void setByteCodeOffset(final int newOffset) { if (newOffset < 0 || newOffset > 32767) { throw new IllegalArgumentException("Invalid StackMap offset: " + newOffset); } if (frameType >= Const.SAME_FRAME && frameType <= Const.SAME_FRAME_MAX) { if (newOffset > Const.SAME_FRAME_MAX) { frameType = Const.SAME_FRAME_EXTENDED; } else { frameType = newOffset; } } else if (frameType >= Const.SAME_LOCALS_1_STACK_ITEM_FRAME && frameType <= Const.SAME_LOCALS_1_STACK_ITEM_FRAME_MAX) { if (newOffset > Const.SAME_FRAME_MAX) { frameType = Const.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED; } else { frameType = Const.SAME_LOCALS_1_STACK_ITEM_FRAME + newOffset; } } else if (invalidFrameType(frameType)) { throw new IllegalStateException("Invalid StackMap frameType: " + frameType); } byteCodeOffset = newOffset; } /** * @param constantPool Constant pool to be used for this object. */ public void setConstantPool(final ConstantPool constantPool) { this.constantPool = constantPool; } public void setFrameType(final int ft) { if (ft >= Const.SAME_FRAME && ft <= Const.SAME_FRAME_MAX) { byteCodeOffset = ft - Const.SAME_FRAME; } else if (ft >= Const.SAME_LOCALS_1_STACK_ITEM_FRAME && ft <= Const.SAME_LOCALS_1_STACK_ITEM_FRAME_MAX) { byteCodeOffset = ft - Const.SAME_LOCALS_1_STACK_ITEM_FRAME; } else if (invalidFrameType(ft)) { throw new IllegalArgumentException("Invalid StackMap frameType"); } frameType = ft; } /** * * @deprecated since 6.0 */ @java.lang.Deprecated public void setNumberOfLocals(final int n) { // TODO unused } /** * * @deprecated since 6.0 */ @java.lang.Deprecated public void setNumberOfStackItems(final int n) { // TODO unused } public void setTypesOfLocals(final StackMapType[] types) { typesOfLocals = types != null ? types : EMPTY_STACK_MAP_TYPE_ARRAY; } public void setTypesOfStackItems(final StackMapType[] types) { typesOfStackItems = types != null ? types : EMPTY_STACK_MAP_TYPE_ARRAY; } /** * @return String representation. */ @Override public String toString() { final StringBuilder buf = new StringBuilder(64); buf.append("("); if (frameType >= Const.SAME_FRAME && frameType <= Const.SAME_FRAME_MAX) { buf.append("SAME"); } else if (frameType >= Const.SAME_LOCALS_1_STACK_ITEM_FRAME && frameType <= Const.SAME_LOCALS_1_STACK_ITEM_FRAME_MAX) { buf.append("SAME_LOCALS_1_STACK"); } else if (frameType == Const.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED) { buf.append("SAME_LOCALS_1_STACK_EXTENDED"); } else if (frameType >= Const.CHOP_FRAME && frameType <= Const.CHOP_FRAME_MAX) { buf.append("CHOP ").append(String.valueOf(251 - frameType)); } else if (frameType == Const.SAME_FRAME_EXTENDED) { buf.append("SAME_EXTENDED"); } else if (frameType >= Const.APPEND_FRAME && frameType <= Const.APPEND_FRAME_MAX) { buf.append("APPEND ").append(String.valueOf(frameType - 251)); } else if (frameType == Const.FULL_FRAME) { buf.append("FULL"); } else { buf.append("UNKNOWN (").append(frameType).append(")"); } buf.append(", offset delta=").append(byteCodeOffset); if (typesOfLocals.length > 0) { buf.append(", locals={"); for (int i = 0; i < typesOfLocals.length; i++) { buf.append(typesOfLocals[i]); if (i < typesOfLocals.length - 1) { buf.append(", "); } } buf.append("}"); } if (typesOfStackItems.length > 0) { buf.append(", stack items={"); for (int i = 0; i < typesOfStackItems.length; i++) { buf.append(typesOfStackItems[i]); if (i < typesOfStackItems.length - 1) { buf.append(", "); } } buf.append("}"); } buf.append(")"); return buf.toString(); } /** * Update the distance (as an offset delta) from this StackMap entry to the next. Note that this might cause the * frame type to change. Note also that delta may be negative. * * @param delta offset delta */ public void updateByteCodeOffset(final int delta) { setByteCodeOffset(byteCodeOffset + delta); } }
⏎ org/apache/bcel/classfile/StackMapEntry.java
Or download all of them as a single archive file:
File name: bcel-6.6.1-sources.jar File size: 688374 bytes Release date: 2022-09-18 Download
⇒ Install Apache BCEL 6.5.0 Binary Package
⇐ Download and Install Apache BCEL Source Package
2021-08-21, 63018👍, 0💬
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