org.trypticon.luceneupgrader.lucene4.internal.lucene.util.IntsRefBuilder Maven / Gradle / Ivy
package org.trypticon.luceneupgrader.lucene4.internal.lucene.util;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/**
* A builder for {@link IntsRef} instances.
* @lucene.internal
*/
public class IntsRefBuilder {
private final IntsRef ref;
/** Sole constructor. */
public IntsRefBuilder() {
ref = new IntsRef();
}
/** Return a reference to the ints of this builder. */
public int[] ints() {
return ref.ints;
}
/** Return the number of ints in this buffer. */
public int length() {
return ref.length;
}
/** Set the length. */
public void setLength(int length) {
this.ref.length = length;
}
/** Empty this builder. */
public void clear() {
setLength(0);
}
/** Return the int at the given offset. */
public int intAt(int offset) {
return ref.ints[offset];
}
/** Set an int. */
public void setIntAt(int offset, int b) {
ref.ints[offset] = b;
}
/** Append the provided int to this buffer. */
public void append(int i) {
grow(ref.length + 1);
ref.ints[ref.length++] = i;
}
/**
* Used to grow the reference array.
*
* In general this should not be used as it does not take the offset into account.
* @lucene.internal */
public void grow(int newLength) {
ref.ints = ArrayUtil.grow(ref.ints, newLength);
}
/**
* Copies the given array into this instance.
*/
public void copyInts(int[] otherInts, int otherOffset, int otherLength) {
grow(otherLength);
System.arraycopy(otherInts, otherOffset, ref.ints, 0, otherLength);
ref.length = otherLength;
}
/**
* Copies the given array into this instance.
*/
public void copyInts(IntsRef ints) {
copyInts(ints.ints, ints.offset, ints.length);
}
/**
* Copy the given UTF-8 bytes into this builder. Works as if the bytes were
* first converted from UTF-8 to UTF-32 and then copied into this builder.
*/
public void copyUTF8Bytes(BytesRef bytes) {
grow(bytes.length);
ref.length = UnicodeUtil.UTF8toUTF32(bytes, ref.ints);
}
/**
* Return a {@link IntsRef} that points to the internal content of this
* builder. Any update to the content of this builder might invalidate
* the provided ref and vice-versa.
*/
public IntsRef get() {
assert ref.offset == 0 : "Modifying the offset of the returned ref is illegal";
return ref;
}
/** Build a new {@link CharsRef} that has the same content as this builder. */
public IntsRef toIntsRef() {
return IntsRef.deepCopyOf(get());
}
@Override
public boolean equals(Object obj) {
throw new UnsupportedOperationException();
}
@Override
public int hashCode() {
throw new UnsupportedOperationException();
}
}