Examples with MergedStream com.fasterxml.jackson.core.io.MergedStream used on opensource projects

Example 1 with MergedStream

use of com.fasterxml.jackson.core.io.MergedStream in project jackson-core by FasterXML.

the class TestMergedStream method testSimple.

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...
    assertFalse(ms.markSupported());
    // so this won't work, but shouldn't throw exception
    ms.mark(1);
    assertEquals((byte) 'A', ms.read());
    assertEquals(3, ms.skip(3));
    byte[] buffer = new byte[5];
    /* Ok, now, code is allowed to return anywhere between 1 and 3,
         * but we now it will return 1...
         */
    assertEquals(1, ms.read(buffer, 1, 3));
    assertEquals((byte) 'E', buffer[1]);
    // So let's read bit more
    assertEquals(3, ms.read(buffer, 0, 3));
    assertEquals((byte) 'F', buffer[0]);
    assertEquals((byte) 'G', buffer[1]);
    assertEquals((byte) 'H', buffer[2]);
    assertEquals(2, ms.available());
    // And then skip the reset
    assertEquals(2, ms.skip(200));
    ms.close();
}