Examples of org.apache.harmony.pack200.Segment$SegmentConstantPool

org.apache.harmony.pack200.SegmentConstantPool
A Pack200 archive consists of one (or more) segments. Each segment is standalone, in the sense that every segment has the magic number header; thus, every segment is also a valid archive. However, it is possible to combine (non-GZipped) archives into a single large archive by concatenation alone. Thus all the hard work in unpacking an archive falls to understanding a segment. This class implements the Pack200 specification by an entry point ( {@link #parse(InputStream)}) which in turn delegates to a variety of other parse methods. Each parse method corresponds (roughly) to the name of the bands in the Pack200 specification. The first component of a segment is the header; this contains (amongst other things) the expected counts of constant pool entries, which in turn defines how many values need to be read from the stream. Because values are variable width (see {@link Codec}), it is not possible to calculate the start of the next segment, although one of the header values does hint at the size of the segment if non-zero, which can be used for buffering purposes. Note that this does not perform any buffering of the input stream; each value will be read on a byte-by-byte basis. It does not perform GZip decompression automatically; both of these are expected to be done by the caller if the stream has the magic header for GZip streams ( {@link GZIPInputStream#GZIP_MAGIC}). In any case, if GZip decompression is being performed the input stream will be buffered at a higher level, and thus this can read on a byte-oriented basis. @author Alex Blewitt @version $Revision: $

    protected int getPoolID() {
        return SegmentConstantPool.CP_STRING;
    }
    
    protected void setNestedEntries(ByteCode byteCode, OperandManager operandManager, int offset) throws Pack200Exception {
        SegmentConstantPool globalPool = operandManager.globalConstantPool();
        ClassFileEntry[] nested = null;
        nested = new ClassFileEntry[] {
                new CPString((String)globalPool.getValue(getPoolID(), offset))
                };
        byteCode.setNested(nested);
        if(widened) {
            byteCode.setNestedPositions(new int[][]{{0, 2}});
        } else {

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    protected abstract int getPoolID();
    protected abstract int getOffset(OperandManager operandManager);
    
    protected void setNestedEntries(ByteCode byteCode, OperandManager operandManager, int offset) throws Pack200Exception {
        SegmentConstantPool globalPool = operandManager.globalConstantPool();
        ClassFileEntry[] nested = null;
        nested = new ClassFileEntry[] {
                    globalPool.getConstantPoolEntry(getPoolID(), offset)
            };
        byteCode.setNested(nested);
        byteCode.setNestedPositions(new int[][] {{0,2}});
    }

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    protected int getOffset(OperandManager operandManager) {
        return operandManager.nextInitRef();
    }


    protected void setNestedEntries(ByteCode byteCode, OperandManager operandManager, int offset) throws Pack200Exception {
        SegmentConstantPool globalPool = operandManager.globalConstantPool();
        ClassFileEntry[] nested = null;
        nested = new ClassFileEntry[] {
                globalPool.getInitMethodPoolEntry(SegmentConstantPool.CP_METHOD, offset, context(operandManager))
        };
        byteCode.setNested(nested);
        byteCode.setNestedPositions(new int[][] {{0, 2}});
    }

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    protected int getPoolID() {
        return SegmentConstantPool.CP_STRING;
    }


    protected void setNestedEntries(ByteCode byteCode, OperandManager operandManager, int offset) throws Pack200Exception {
        SegmentConstantPool globalPool = operandManager.globalConstantPool();
        ClassFileEntry[] nested = null;
        nested = new ClassFileEntry[] {
                new CPString((String)globalPool.getValue(getPoolID(), offset))
                };
        byteCode.setNested(nested);
        if(widened) {
            byteCode.setNestedPositions(new int[][]{{0, 2}});
        } else {

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    protected abstract int getPoolID();
    protected abstract int getOffset(OperandManager operandManager);


    protected void setNestedEntries(ByteCode byteCode, OperandManager operandManager, int offset) throws Pack200Exception {
        SegmentConstantPool globalPool = operandManager.globalConstantPool();
        ClassFileEntry[] nested = null;
        nested = new ClassFileEntry[] {
                    globalPool.getConstantPoolEntry(getPoolID(), offset)
            };
        byteCode.setNested(nested);
        byteCode.setNestedPositions(new int[][] {{0,2}});
    }

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    protected int getOffset(OperandManager operandManager) {
        return operandManager.nextInitRef();
    }


    protected void setNestedEntries(ByteCode byteCode, OperandManager operandManager, int offset) throws Pack200Exception {
        SegmentConstantPool globalPool = operandManager.globalConstantPool();
        ClassFileEntry[] nested = null;
        nested = new ClassFileEntry[] {
                globalPool.getInitMethodPoolEntry(SegmentConstantPool.CP_METHOD, offset, context(operandManager))
        };
        byteCode.setNested(nested);
        byteCode.setNestedPositions(new int[][] {{0, 2}});
    }

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          { },
          { },
          { },
          { "Eins", "Zwei", "Drei", "Vier", "Funf", "Sechs", "Sieben", "Acht", "Neun" }, // Signature
      };
      return new SegmentConstantPool(null) {
        public Object getValue(int cp, long index) {
          if (index == -1)
            return null;
          return data[cp][(int)index];
        }

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        String result = operandManager.getNewClass();
        return result;
    }


    protected void setNestedEntries(ByteCode byteCode, OperandManager operandManager, int offset) throws Pack200Exception {
        SegmentConstantPool globalPool = operandManager.globalConstantPool();
        ClassFileEntry[] nested = null;
        nested = new ClassFileEntry[] {
                globalPool.getInitMethodPoolEntry(SegmentConstantPool.CP_METHOD, offset, context(operandManager))
        };
        byteCode.setNested(nested);
        byteCode.setNestedPositions(new int[][] {{0, 2}});
    }

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            OperandManager operandManager, int codeLength) {
        ClassFileEntry[] nested = null;
        int offset = getOffset(operandManager);
        if(offset == 0) {
            // Use current class
            SegmentConstantPool globalPool = operandManager.globalConstantPool();
            nested = new ClassFileEntry[] {
                        globalPool.getClassPoolEntry(operandManager.getCurrentClass())
            };
            byteCode.setNested(nested);
            byteCode.setNestedPositions(new int[][] {{0,2}});
        } else {
            // Look up the class in the classpool

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    protected abstract int getOffset(OperandManager operandManager);
    protected abstract int getPoolID();
    protected abstract String context(OperandManager operandManager);


    protected void setNestedEntries(ByteCode byteCode, OperandManager operandManager, int offset) throws Pack200Exception {
        SegmentConstantPool globalPool = operandManager.globalConstantPool();
        ClassFileEntry[] nested = null;
        nested = new ClassFileEntry[] {
                globalPool.getClassSpecificPoolEntry(getPoolID(), offset, context(operandManager))
                };
        byteCode.setNested(nested);
        byteCode.setNestedPositions(new int[][] {{0, 2}});
    }

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