Java ObjectInputStream.read方法代码示例

import java.io.ObjectInputStream; //导入方法依赖的package包/类
private void readObject(ObjectInputStream in) throws IOException
{
    int len = in.readInt();
    byte[] buffer = new byte[len];
    int readSoFar = 0;
    while (readSoFar < len)
    {
        readSoFar += in.read(buffer, readSoFar, len - readSoFar);
    }
    this.contents = new String(buffer, JrpipServiceRegistry.ENCODE_STRING);
}
 

import java.io.ObjectInputStream; //导入方法依赖的package包/类
/**
 * Deserializes an {@link MBeanFeatureInfo} from an {@link ObjectInputStream}.
 * @serialData
 * For compatibility reasons, an object of this class is deserialized as follows.
 * <p>
 * The method {@link ObjectInputStream#defaultReadObject defaultReadObject()}
 * is called first to deserialize the object except the field
 * {@code descriptor}, which is not serialized in the default way. Then the method
 * {@link ObjectInputStream#read read()} is called to read a byte, the field
 * {@code descriptor} is deserialized according to the value of the byte value:
 *    <ul>
 *    <li>1. The method {@link ObjectInputStream#readObject readObject()}
 *       is called twice to obtain the field names (a {@code String[]}) and
 *       the field values (a {@code Object[]}) of the {@code descriptor}.
 *       The two obtained values then are used to construct
 *       an {@link ImmutableDescriptor} instance for the field
 *       {@code descriptor};</li>
 *    <li>0. The value for the field {@code descriptor} is obtained directly
 *       by calling the method {@link ObjectInputStream#readObject readObject()}.
 *       If the obtained value is null, the field {@code descriptor} is set to
 *       {@link ImmutableDescriptor#EMPTY_DESCRIPTOR EMPTY_DESCRIPTOR};</li>
 *    <li>-1. This means that there is no byte to read and that the object is from
 *       an earlier version of the JMX API. The field {@code descriptor} is set
 *       to {@link ImmutableDescriptor#EMPTY_DESCRIPTOR EMPTY_DESCRIPTOR}</li>
 *    <li>Any other value. A {@link StreamCorruptedException} is thrown.</li>
 *    </ul>
 *
 * @since 1.6
 */
private void readObject(ObjectInputStream in)
    throws IOException, ClassNotFoundException {

    in.defaultReadObject();

    switch (in.read()) {
    case 1:
        final String[] names = (String[])in.readObject();

        final Object[] values = (Object[]) in.readObject();
        descriptor = (names.length == 0) ?
            ImmutableDescriptor.EMPTY_DESCRIPTOR :
            new ImmutableDescriptor(names, values);

        break;
    case 0:
        descriptor = (Descriptor)in.readObject();

        if (descriptor == null) {
            descriptor = ImmutableDescriptor.EMPTY_DESCRIPTOR;
        }

        break;
    case -1: // from an earlier version of the JMX API
        descriptor = ImmutableDescriptor.EMPTY_DESCRIPTOR;

        break;
    default:
        throw new StreamCorruptedException("Got unexpected byte.");
    }
}
 

import java.io.ObjectInputStream; //导入方法依赖的package包/类
/**
 * Deserializes an {@link MBeanInfo} from an {@link ObjectInputStream}.
 * @serialData
 * For compatibility reasons, an object of this class is deserialized as follows.
 * <p>
 * The method {@link ObjectInputStream#defaultReadObject defaultReadObject()}
 * is called first to deserialize the object except the field
 * {@code descriptor}, which is not serialized in the default way. Then the method
 * {@link ObjectInputStream#read read()} is called to read a byte, the field
 * {@code descriptor} is deserialized according to the value of the byte value:
 *    <ul>
 *    <li>1. The method {@link ObjectInputStream#readObject readObject()}
 *       is called twice to obtain the field names (a {@code String[]}) and
 *       the field values (a {@code Object[]}) of the {@code descriptor}.
 *       The two obtained values then are used to construct
 *       an {@link ImmutableDescriptor} instance for the field
 *       {@code descriptor};</li>
 *    <li>0. The value for the field {@code descriptor} is obtained directly
 *       by calling the method {@link ObjectInputStream#readObject readObject()}.
 *       If the obtained value is null, the field {@code descriptor} is set to
 *       {@link ImmutableDescriptor#EMPTY_DESCRIPTOR EMPTY_DESCRIPTOR};</li>
 *    <li>-1. This means that there is no byte to read and that the object is from
 *       an earlier version of the JMX API. The field {@code descriptor} is set to
 *       {@link ImmutableDescriptor#EMPTY_DESCRIPTOR EMPTY_DESCRIPTOR}.</li>
 *    <li>Any other value. A {@link StreamCorruptedException} is thrown.</li>
 *    </ul>
 *
 * @since 1.6
 */

private void readObject(ObjectInputStream in)
    throws IOException, ClassNotFoundException {

    in.defaultReadObject();

    switch (in.read()) {
    case 1:
        final String[] names = (String[])in.readObject();

        final Object[] values = (Object[]) in.readObject();
        descriptor = (names.length == 0) ?
            ImmutableDescriptor.EMPTY_DESCRIPTOR :
            new ImmutableDescriptor(names, values);

        break;
    case 0:
        descriptor = (Descriptor)in.readObject();

        if (descriptor == null) {
            descriptor = ImmutableDescriptor.EMPTY_DESCRIPTOR;
        }

        break;
    case -1: // from an earlier version of the JMX API
        descriptor = ImmutableDescriptor.EMPTY_DESCRIPTOR;

        break;
    default:
        throw new StreamCorruptedException("Got unexpected byte.");
    }
}
 

import java.io.ObjectInputStream; //导入方法依赖的package包/类
/**
 * Deserializes an {@link MBeanFeatureInfo} from an {@link ObjectInputStream}.
 * @serialData
 * For compatibility reasons, an object of this class is deserialized as follows.
 * <p>
 * The method {@link ObjectInputStream#defaultReadObject defaultReadObject()}
 * is called first to deserialize the object except the field
 * {@code descriptor}, which is not serialized in the default way. Then the method
 * {@link ObjectInputStream#read read()} is called to read a byte, the field
 * {@code descriptor} is deserialized according to the value of the byte value:
 *    <ul>
 *    <li>1. The method {@link ObjectInputStream#readObject readObject()}
 *       is called twice to obtain the field names (a {@code String[]}) and
 *       the field values (an {@code Object[]}) of the {@code descriptor}.
 *       The two obtained values then are used to construct
 *       an {@link ImmutableDescriptor} instance for the field
 *       {@code descriptor};</li>
 *    <li>0. The value for the field {@code descriptor} is obtained directly
 *       by calling the method {@link ObjectInputStream#readObject readObject()}.
 *       If the obtained value is null, the field {@code descriptor} is set to
 *       {@link ImmutableDescriptor#EMPTY_DESCRIPTOR EMPTY_DESCRIPTOR};</li>
 *    <li>-1. This means that there is no byte to read and that the object is from
 *       an earlier version of the JMX API. The field {@code descriptor} is set
 *       to {@link ImmutableDescriptor#EMPTY_DESCRIPTOR EMPTY_DESCRIPTOR}</li>
 *    <li>Any other value. A {@link StreamCorruptedException} is thrown.</li>
 *    </ul>
 *
 * @since 1.6
 */
private void readObject(ObjectInputStream in)
    throws IOException, ClassNotFoundException {

    in.defaultReadObject();

    switch (in.read()) {
    case 1:
        final String[] names = (String[])in.readObject();

        final Object[] values = (Object[]) in.readObject();
        descriptor = (names.length == 0) ?
            ImmutableDescriptor.EMPTY_DESCRIPTOR :
            new ImmutableDescriptor(names, values);

        break;
    case 0:
        descriptor = (Descriptor)in.readObject();

        if (descriptor == null) {
            descriptor = ImmutableDescriptor.EMPTY_DESCRIPTOR;
        }

        break;
    case -1: // from an earlier version of the JMX API
        descriptor = ImmutableDescriptor.EMPTY_DESCRIPTOR;

        break;
    default:
        throw new StreamCorruptedException("Got unexpected byte.");
    }
}
 

import java.io.ObjectInputStream; //导入方法依赖的package包/类
/**
 * Deserializes an {@link MBeanInfo} from an {@link ObjectInputStream}.
 * @serialData
 * For compatibility reasons, an object of this class is deserialized as follows.
 * <p>
 * The method {@link ObjectInputStream#defaultReadObject defaultReadObject()}
 * is called first to deserialize the object except the field
 * {@code descriptor}, which is not serialized in the default way. Then the method
 * {@link ObjectInputStream#read read()} is called to read a byte, the field
 * {@code descriptor} is deserialized according to the value of the byte value:
 *    <ul>
 *    <li>1. The method {@link ObjectInputStream#readObject readObject()}
 *       is called twice to obtain the field names (a {@code String[]}) and
 *       the field values (an {@code Object[]}) of the {@code descriptor}.
 *       The two obtained values then are used to construct
 *       an {@link ImmutableDescriptor} instance for the field
 *       {@code descriptor};</li>
 *    <li>0. The value for the field {@code descriptor} is obtained directly
 *       by calling the method {@link ObjectInputStream#readObject readObject()}.
 *       If the obtained value is null, the field {@code descriptor} is set to
 *       {@link ImmutableDescriptor#EMPTY_DESCRIPTOR EMPTY_DESCRIPTOR};</li>
 *    <li>-1. This means that there is no byte to read and that the object is from
 *       an earlier version of the JMX API. The field {@code descriptor} is set to
 *       {@link ImmutableDescriptor#EMPTY_DESCRIPTOR EMPTY_DESCRIPTOR}.</li>
 *    <li>Any other value. A {@link StreamCorruptedException} is thrown.</li>
 *    </ul>
 *
 * @since 1.6
 */

private void readObject(ObjectInputStream in)
    throws IOException, ClassNotFoundException {

    in.defaultReadObject();

    switch (in.read()) {
    case 1:
        final String[] names = (String[])in.readObject();

        final Object[] values = (Object[]) in.readObject();
        descriptor = (names.length == 0) ?
            ImmutableDescriptor.EMPTY_DESCRIPTOR :
            new ImmutableDescriptor(names, values);

        break;
    case 0:
        descriptor = (Descriptor)in.readObject();

        if (descriptor == null) {
            descriptor = ImmutableDescriptor.EMPTY_DESCRIPTOR;
        }

        break;
    case -1: // from an earlier version of the JMX API
        descriptor = ImmutableDescriptor.EMPTY_DESCRIPTOR;

        break;
    default:
        throw new StreamCorruptedException("Got unexpected byte.");
    }
}
 

import java.io.ObjectInputStream; //导入方法依赖的package包/类
void readObject(ObjectInputStream in) throws IOException {
    nClasses = in.readInt();

    if (nClasses == 0) {
        return;
    }

    if ((instrMethodClasses == null) || (nClasses > instrMethodClasses.length)) {
        instrMethodClasses = new String[nClasses];
        instrMethodClassLoaderIds = new int[nClasses];
    }

    for (int i = 0; i < nClasses; i++) {
        instrMethodClasses[i] = in.readUTF();
        instrMethodClassLoaderIds[i] = in.readInt();
    }

    nMethods = in.readInt();

    int code = in.read();

    if (code != 0) {
        if ((instrMethodLeaf == null) || (nMethods > instrMethodLeaf.length)) {
            instrMethodLeaf = new boolean[nMethods];
        }

        for (int i = 0; i < nMethods; i++) {
            instrMethodLeaf[i] = in.readBoolean();
        }
    } else {
        instrMethodLeaf = null;
    }

    addInfo = in.readInt();

    if ((replacementClassFileBytes == null) || (nClasses > replacementClassFileBytes.length)) {
        replacementClassFileBytes = new byte[nClasses][];
    }

    for (int i = 0; i < nClasses; i++) {
        int len = in.readInt();

        if (len > 0) {
            replacementClassFileBytes[i] = new byte[len];
            in.readFully(replacementClassFileBytes[i]);
        }
    }
}