Examples with PageCursor org.neo4j.io.pagecache.PageCursor used on opensource projects

Example 36 with PageCursor

use of org.neo4j.io.pagecache.PageCursor in project neo4j by neo4j.

the class CompositePageCursorTest method getIntOffsettedBeforeFirstPageMustRaiseBoundsFlag.

@Test
public void getIntOffsettedBeforeFirstPageMustRaiseBoundsFlag() throws Exception {
    PageCursor pageCursor = CompositePageCursor.compose(first, PAGE_SIZE, second, PAGE_SIZE);
    pageCursor.getInt(-1);
    assertTrue(pageCursor.checkAndClearBoundsFlag());
    assertFalse(pageCursor.checkAndClearBoundsFlag());
}

Example 37 with PageCursor

use of org.neo4j.io.pagecache.PageCursor in project neo4j by neo4j.

the class CompositePageCursorTest method overlappingGetAccess.

@Test
public void overlappingGetAccess() throws Exception {
    PageCursor c = CompositePageCursor.compose(first, PAGE_SIZE, second, PAGE_SIZE);
    c.setOffset(PAGE_SIZE - 2);
    assertThat(c.getInt(), is(0xAEAFB0B1));
    c.setOffset(PAGE_SIZE - 1);
    assertThat(c.getShort(), is((short) 0xAFB0));
    c.setOffset(PAGE_SIZE - 4);
    assertThat(c.getLong(), is(0xACADAEAFB0B1B2B3L));
    c.setOffset(PAGE_SIZE - 2);
    c.getBytes(bytes);
    assertThat(bytes, byteArray(0xAE, 0xAF, 0xB0, 0xB1));
}

Example 38 with PageCursor

use of org.neo4j.io.pagecache.PageCursor in project neo4j by neo4j.

the class CompositePageCursorTest method putShortMustRespectOffsetIntoSecondCursor.

@Test
public void putShortMustRespectOffsetIntoSecondCursor() throws Exception {
    second.setOffset(1);
    PageCursor c = CompositePageCursor.compose(first, 2, second, 4);
    c.putShort((short) 1);
    c.putShort((short) 2);
    assertThat(second.getShort(1), is((short) 2));
    assertThat(c.getShort(), is((short) 0xB3B4));
    assertFalse(c.checkAndClearBoundsFlag());
}

Example 39 with PageCursor

use of org.neo4j.io.pagecache.PageCursor in project neo4j by neo4j.

the class CompositePageCursorTest method rewindCompositeCursor.

@Test
public void rewindCompositeCursor() throws Exception {
    first.setOffset(1);
    second.setOffset(2);
    PageCursor pageCursor = CompositePageCursor.compose(first, PAGE_SIZE, second, PAGE_SIZE);
    pageCursor.getLong();
    pageCursor.getLong();
    pageCursor.getLong();
    pageCursor.rewind();
    assertEquals(0, pageCursor.getOffset());
    assertEquals(1, first.getOffset());
    assertEquals(2, second.getOffset());
}

Example 40 with PageCursor

use of org.neo4j.io.pagecache.PageCursor in project neo4j by neo4j.

the class CompositePageCursorTest method getLongMustHitSecondCursorAfterFlip.

@Test
public void getLongMustHitSecondCursorAfterFlip() throws Exception {
    PageCursor c = CompositePageCursor.compose(first, 8, second, 8);
    assertThat(c.getLong(), is(0xA0A1A2A3A4A5A6A7L));
    assertThat(c.getLong(), is(0xB0B1B2B3B4B5B6B7L));
    assertFalse(c.checkAndClearBoundsFlag());
}