com.yworks.yguard.obf.classfile.ModuleProvides Maven / Gradle / Ivy

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package com.yworks.yguard.obf.classfile;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

/**
 * Representation of a module provides struct in the module attribute section.
 * @author Thomas Behr
 */
public class ModuleProvides {
  /** Reference to {@link ClassCpInfo} */
  final int u2providesIndex;
  /** References to {@link ClassCpInfo} */
  final int[] u2providesWithIndex;

  private ModuleProvides( final int index, final int[] withIndex ) {
    this.u2providesIndex = index;
    this.u2providesWithIndex = withIndex;
  }

  static ModuleProvides read( final DataInput din ) throws IOException {
    final int index = din.readUnsignedShort();
    final int withCount = din.readUnsignedShort();
    final int[] withIndex = new int[withCount];
    for (int j = 0; j < withCount; ++j) {
      withIndex[j] = din.readUnsignedShort();
    }

    return new ModuleProvides(index, withIndex);
  }

  void write( final DataOutput dout ) throws IOException {
    dout.writeShort(u2providesIndex);
    final int u2providesWithCount = u2providesWithIndex.length;
    dout.writeShort(u2providesWithCount);
    for (int i = 0; i < u2providesWithCount; ++i) {
      dout.writeShort(u2providesWithIndex[i]);
    }
  }
}