Examples of com.fasterxml.jackson.core.io.IOContext

com.fasterxml.jackson.core.io.IOContext
To limit number of configuration and state objects to pass, all contextual objects that need to be passed by the factory to readers and writers are combined under this object. One instance is created for each reader and writer.
NOTE: non-final since 2.4, to allow sub-classing.

    extends com.fasterxml.jackson.core.BaseTest
{
    public void testSimple() throws Exception
    {
        BufferRecycler rec = new BufferRecycler();
        IOContext ctxt = new IOContext(rec, null, false);
        // bit complicated; must use recyclable buffer...
        byte[] first = ctxt.allocReadIOBuffer();
        System.arraycopy("ABCDE".getBytes("UTF-8"), 0, first, 99, 5);
        byte[] second = "FGHIJ".getBytes("UTF-8");


        assertNull(ctxt.getSourceReference());
        assertFalse(ctxt.isResourceManaged());
        ctxt.setEncoding(JsonEncoding.UTF8);
        MergedStream ms = new MergedStream(ctxt, new ByteArrayInputStream(second),
                                           first, 99, 99+5);
        // Ok, first, should have 5 bytes from first buffer:
        assertEquals(5, ms.available());
        // not supported when there's buffered stuff...

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public class TestIOContext
    extends com.fasterxml.jackson.core.BaseTest
{
    public void testAllocations() throws Exception
    {
        IOContext ctxt = new IOContext(new BufferRecycler(), "N/A", true);


        /* I/O Read buffer */


        // First succeeds:
        assertNotNull(ctxt.allocReadIOBuffer());
        // second fails
        try {
            ctxt.allocReadIOBuffer();
        } catch (IllegalStateException e) {
            verifyException(e, "second time");
        }
        // Also: can't succeed with different buffer
        try {
            ctxt.releaseReadIOBuffer(new byte[1]);
        } catch (IllegalArgumentException e) {
            verifyException(e, "not owned");
        }
        // but call with null is a NOP for convenience
        ctxt.releaseReadIOBuffer(null);


        /* I/O Write buffer */


        assertNotNull(ctxt.allocWriteEncodingBuffer());
        try {
            ctxt.allocWriteEncodingBuffer();
        } catch (IllegalStateException e) {
            verifyException(e, "second time");
        }
        try {
            ctxt.releaseWriteEncodingBuffer(new byte[1]);
        } catch (IllegalArgumentException e) {
            verifyException(e, "not owned");
        }
        ctxt.releaseWriteEncodingBuffer(null);


        /* Token (read) buffer */


        assertNotNull(ctxt.allocTokenBuffer());
        try {
            ctxt.allocTokenBuffer();
        } catch (IllegalStateException e) {
            verifyException(e, "second time");
        }
        try {
            ctxt.releaseTokenBuffer(new char[1]);
        } catch (IllegalArgumentException e) {
            verifyException(e, "not owned");
        }
        ctxt.releaseTokenBuffer(null);


        /* Concat (write?) buffer */


        assertNotNull(ctxt.allocConcatBuffer());
        try {
            ctxt.allocConcatBuffer();
        } catch (IllegalStateException e) {
            verifyException(e, "second time");
        }
        try {
            ctxt.releaseConcatBuffer(new char[1]);
        } catch (IllegalArgumentException e) {
            verifyException(e, "not owned");
        }
        ctxt.releaseConcatBuffer(null);


        /* NameCopy (write?) buffer */


        assertNotNull(ctxt.allocNameCopyBuffer(100));
        try {
            ctxt.allocNameCopyBuffer(100);
        } catch (IllegalStateException e) {
            verifyException(e, "second time");
        }
        try {
            ctxt.releaseNameCopyBuffer(new char[1]);
        } catch (IllegalArgumentException e) {
            verifyException(e, "not owned");
        }
        ctxt.releaseNameCopyBuffer(null);
    }

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    @Override
    public SmileParser createJsonParser(byte[] data)
        throws IOException, JsonParseException
    {
        IOContext ctxt = _createContext(data, true);
        return _createJsonParser(data, 0, data.length, ctxt);
    }

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     */
    @Override
    public SmileGenerator createJsonGenerator(OutputStream out) throws IOException
    {
        // false -> we won't manage the stream unless explicitly directed to
        IOContext ctxt = _createContext(out, false);
        return _createJsonGenerator(out, ctxt);
    }

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     */
    @Override
    public YAMLGenerator createJsonGenerator(OutputStream out) throws IOException
    {
        // false -> we won't manage the stream unless explicitly directed to
        IOContext ctxt = _createContext(out, false);
        return _createJsonGenerator(ctxt, _createWriter(out, JsonEncoding.UTF8, ctxt));
    }

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    @Override
    public ToXmlGenerator createGenerator(File f, JsonEncoding enc) throws IOException
    {
        OutputStream out = new FileOutputStream(f);
        // true -> yes, we have to manage the stream since we created it
        IOContext ctxt = _createContext(out, true);
        ctxt.setEncoding(enc);
        return new ToXmlGenerator(ctxt, _generatorFeatures, _xmlGeneratorFeatures,
                _objectCodec, _createXmlWriter(out));
    }

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    public ToXmlGenerator createJsonGenerator(File f, JsonEncoding enc)
        throws IOException
    {
        OutputStream out = new FileOutputStream(f);
        // true -> yes, we have to manage the stream since we created it
        IOContext ctxt = _createContext(out, true);
        ctxt.setEncoding(enc);
        return new ToXmlGenerator(ctxt, _generatorFeatures, _xmlGeneratorFeatures,
                _objectCodec, _createXmlWriter(out));
    }

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    @SuppressWarnings("resource")
    @Override
    public CsvGenerator createGenerator(OutputStream out, JsonEncoding enc) throws IOException
    {
        // false -> we won't manage the stream unless explicitly directed to
        IOContext ctxt = _createContext(out, false);
        // [JACKSON-512]: allow wrapping with _outputDecorator
        if (_outputDecorator != null) {
            out = _outputDecorator.decorate(ctxt, out);
        }
        return _createGenerator(ctxt, _createWriter(out, JsonEncoding.UTF8, ctxt));

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    @SuppressWarnings("resource")
    @Override
    public CsvGenerator createGenerator(Writer out) throws IOException
    {
        IOContext ctxt = _createContext(out, false);
        // [JACKSON-512]: allow wrapping with _outputDecorator
        if (_outputDecorator != null) {
            out = _outputDecorator.decorate(ctxt, out);
        }
        return _createGenerator(out, ctxt);

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    @Override
    public CsvGenerator createGenerator(File f, JsonEncoding enc) throws IOException
    {
        OutputStream out = new FileOutputStream(f);
        // Important: make sure that we always auto-close stream we create:
        IOContext ctxt = _createContext(out, false);
        // [JACKSON-512]: allow wrapping with _outputDecorator
        if (_outputDecorator != null) {
            out = _outputDecorator.decorate(ctxt, out);
        }
        return _createGenerator(ctxt, _createWriter(out, JsonEncoding.UTF8, ctxt));

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Related Classes of com.fasterxml.jackson.core.io.IOContext

com.fasterxml.jackson.core.io.TestIOContext

com.fasterxml.jackson.core.io.TestMergedStream

com.fasterxml.jackson.core.io.TestUTF8Writer

com.fasterxml.jackson.core.json.TestUtf8Generator

com.fasterxml.jackson.core.TestVersions

com.fasterxml.jackson.core.util.TextBuffer

com.fasterxml.jackson.dataformat.avro.AvroFactory

com.fasterxml.jackson.dataformat.csv.CsvFactory

com.fasterxml.jackson.dataformat.smile.SmileFactory

com.fasterxml.jackson.dataformat.xml.XmlFactory

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