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ProGuardCORE is a free library to read, analyze, modify, and write Java class files.
There is a newer version: 9.1.6
/*
 * ProGuardCORE -- library to process Java bytecode.
 *
 * Copyright (c) 2002-2020 Guardsquare NV
 *
 * Licensed 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 proguard.io;

import java.io.*;

/**
 * This class delegates its method calls to the corresponding {@link DataOutput} methods, converting
 * its IOExceptions to RuntimeExceptions.
 *
 * The class provides two convenience methods that additionally check whether the written values
 * are unsigned resp. signed short values before writing them.
 *
 * @author Eric Lafortune
 */
public class RuntimeDataOutput {
  private final DataOutput dataOutput;

  public RuntimeDataOutput(DataOutput dataOutput) {
    this.dataOutput = dataOutput;
  }

  // Methods delegating to DataOutput.

  public void write(byte[] b) {
    try {
      dataOutput.write(b);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void write(byte[] b, int off, int len) {
    try {
      dataOutput.write(b, off, len);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void write(int b) {
    try {
      dataOutput.write(b);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void writeBoolean(boolean v) {
    try {
      dataOutput.writeBoolean(v);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void writeByte(int v) {
    try {
      dataOutput.writeByte(v);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void writeBytes(String s) {
    try {
      dataOutput.writeBytes(s);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void writeChar(int v) {
    try {
      dataOutput.writeChar(v);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void writeChars(String s) {
    try {
      dataOutput.writeChars(s);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void writeDouble(double v) {
    try {
      dataOutput.writeDouble(v);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void writeFloat(float v) {
    try {
      dataOutput.writeFloat(v);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void writeInt(int v) {
    try {
      dataOutput.writeInt(v);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void writeLong(long v) {
    try {
      dataOutput.writeLong(v);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  /**
   * Checks if the given value is an unsigned short value before writing it.
   *
   * @throws IllegalArgumentException if the value is not an unsigned short value.
   * @see #writeShort(int)
   */
  public void writeUnsignedShort(int v) {
    if ((v & 0xffff) != v) {
      throw new IllegalArgumentException("Overflow of unsigned short value [" + v + "]");
    }

    writeShort(v);
  }

  /**
   * Checks if the given value is a signed short value before writing it.
   *
   * @throws IllegalArgumentException if the value is not a signed short value.
   * @see #writeShort(int)
   */
  public void writeSignedShort(int v) {
    if ((short) v != v) {
      throw new IllegalArgumentException("Overflow of signed short value [" + v + "]");
    }

    writeShort(v);
  }

  public void writeShort(int v) {
    try {
      dataOutput.writeShort(v);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }

  public void writeUTF(String str) {
    try {
      dataOutput.writeUTF(str);
    } catch (IOException ex) {
      throw new RuntimeException(ex.getMessage());
    }
  }
}