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#280: Changed Value into an interface, extracted functionality into C…
…oreValue.
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99 changes: 99 additions & 0 deletions
99
core/src/main/java/io/parsingdata/metal/expression/value/CoreValue.java
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/* | ||
* Copyright 2013-2016 Netherlands Forensic Institute | ||
* | ||
* Licensed 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. | ||
*/ | ||
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package io.parsingdata.metal.expression.value; | ||
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import static io.parsingdata.metal.Util.bytesToHexString; | ||
import static io.parsingdata.metal.Util.checkNotNull; | ||
import static io.parsingdata.metal.encoding.Encoding.DEFAULT_ENCODING; | ||
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import java.math.BigInteger; | ||
import java.util.BitSet; | ||
import java.util.Objects; | ||
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import io.parsingdata.metal.Util; | ||
import io.parsingdata.metal.data.Slice; | ||
import io.parsingdata.metal.encoding.ByteOrder; | ||
import io.parsingdata.metal.encoding.Encoding; | ||
import io.parsingdata.metal.encoding.Sign; | ||
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public class CoreValue implements Value { | ||
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public static final Value NOT_A_VALUE = new CoreValue(Slice.createFromBytes(new byte[]{}), DEFAULT_ENCODING); | ||
public static final BigInteger TO_STRING_BYTE_COUNT = BigInteger.valueOf(4); | ||
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private final Slice slice; | ||
private final Encoding encoding; | ||
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public CoreValue(final Slice slice, final Encoding encoding) { | ||
this.slice = checkNotNull(slice, "slice"); | ||
this.encoding = checkNotNull(encoding, "encoding"); | ||
} | ||
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@Override | ||
public Slice getSlice() { | ||
return slice; | ||
} | ||
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@Override | ||
public Encoding getEncoding() { | ||
return encoding; | ||
} | ||
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@Override | ||
public byte[] getValue() { | ||
return slice.getData(); | ||
} | ||
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@Override | ||
public BigInteger getLength() { | ||
return slice.length; | ||
} | ||
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@Override | ||
public BigInteger asNumeric() { | ||
return encoding.sign == Sign.SIGNED ? new BigInteger(encoding.byteOrder.apply(getValue())) | ||
: new BigInteger(1, encoding.byteOrder.apply(getValue())); | ||
} | ||
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@Override | ||
public String asString() { | ||
return new String(getValue(), encoding.charset); | ||
} | ||
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@Override | ||
public BitSet asBitSet() { | ||
return BitSet.valueOf(encoding.byteOrder == ByteOrder.BIG_ENDIAN ? ByteOrder.LITTLE_ENDIAN.apply(getValue()) : getValue()); | ||
} | ||
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@Override | ||
public String toString() { | ||
return "0x" + bytesToHexString(slice.getData(TO_STRING_BYTE_COUNT)) + (getLength().compareTo(TO_STRING_BYTE_COUNT) > 0 ? "..." : ""); | ||
} | ||
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@Override | ||
public boolean equals(final Object obj) { | ||
return Util.notNullAndSameClass(this, obj) | ||
&& Objects.equals(slice, ((CoreValue)obj).slice) | ||
&& Objects.equals(encoding, ((CoreValue)obj).encoding); | ||
} | ||
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@Override | ||
public int hashCode() { | ||
return Objects.hash(getClass(), slice, encoding); | ||
} | ||
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} |
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