mds.data.descriptor_s.StringDsc Maven / Gradle / Ivy

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MDSplus interface (via lib or mdsip).
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package mds.data.descriptor_s;

import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import mds.MdsException;
import mds.data.DATA;
import mds.data.DTYPE;
import mds.data.descriptor.Descriptor;
import mds.data.descriptor.Descriptor_S;

public final class StringDsc extends Descriptor_S implements DATA
{
	public static final String addQuotes(final String str)
	{
		if (str.contains("\""))
		{
			if (str.contains("'"))
				return "\"" + str.replaceAll("\"", "\\\\\"") + "\"";
			return "'" + str + "'";
		}
		return "\"" + str + "\"";
	}

	public static final String decompile(final String str)
	{
		return StringDsc.addQuotes(str).replaceAll("\\\\", "\\\\\\\\");
	}

	private static ByteBuffer pad(final int len, final ByteBuffer value, final byte c)
	{
		final ByteBuffer bb = ByteBuffer.allocateDirect(len).order(Descriptor.BYTEORDER);
		final int rem = value.remaining();
		for (int i = len; i-- > rem;)
			bb.put(c);
		bb.put(value.slice()).rewind();
		return bb;
	}

	public static void putString(final ByteBuffer b, final String value)
	{
		b.put(//
				(b.remaining() < value.length() ? value.substring(0, b.remaining()) : value)//
						.getBytes(StandardCharsets.UTF_8));
	}

	public StringDsc(final ByteBuffer b)
	{
		super(b);
	}

	public StringDsc(final int len, final String value)
	{
		super(DTYPE.T, StringDsc.pad(len, StandardCharsets.UTF_8.encode(value), (byte) ' '));
	}

	public StringDsc(final String value)
	{
		super(DTYPE.T, StandardCharsets.UTF_8.encode(value));
	}

	@Override
	public final Missing abs() throws MdsException
	{
		throw DATA.tdierror;
	}

	@Override
	public final Missing add(final Descriptor X, final Descriptor Y) throws MdsException
	{
		throw DATA.tdierror;
	}

	@Override
	public final StringBuilder decompile(final int prec, final StringBuilder pout, final int mode)
	{
		return pout
				.append(((mode & Descriptor.DECO_STR) == 0) ? StringDsc.decompile(this.getAtomic()) : this.getAtomic());
	}

	@Override
	public final Missing divide(final Descriptor X, final Descriptor Y) throws MdsException
	{
		throw DATA.tdierror;
	}

	@Override
	public final String getAtomic()
	{
		final byte[] buf = new byte[this.length()];
		this.getBuffer().get(buf);
		return new String(buf);
	}

	@Override
	public final StringDsc getLocal_(final FLAG local)
	{
		return this;
	}

	@Override
	public final byte getRank()
	{ return -1; }

	public final String getValue()
	{ return this.getAtomic(); }

	@Override
	public final Missing inot() throws MdsException
	{
		throw DATA.tdierror;
	}

	@Override
	public final boolean isLocal()
	{ return true; }

	@Override
	public final Missing multiply(final Descriptor X, final Descriptor Y) throws MdsException
	{
		throw DATA.tdierror;
	}

	@Override
	public final Missing neg() throws MdsException
	{
		throw DATA.tdierror;
	}

	@Override
	public final Missing power(final Descriptor X, final Descriptor Y) throws MdsException
	{
		throw DATA.tdierror;
	}

	public final void setString(final String value)
	{
		final ByteBuffer tbuf = (ByteBuffer) ((ByteBuffer) this.b.duplicate().position(this.pointer())).slice()
				.limit(this.length());
		if (value.length() > this.length())
			tbuf.put(value.substring(0, this.length()).getBytes(StandardCharsets.UTF_8));
		else
			tbuf.put(value.getBytes(StandardCharsets.UTF_8));
		while (tbuf.hasRemaining())
			tbuf.put((byte) 32);// fill with spaces
	}

	@Override
	public final Missing shiftleft(final Descriptor X) throws MdsException
	{
		throw DATA.tdierror;
	}

	@Override
	public final Missing shiftright(final Descriptor X) throws MdsException
	{
		throw DATA.tdierror;
	}

	@Override
	public final Missing subtract(final Descriptor X, final Descriptor Y) throws MdsException
	{
		throw DATA.tdierror;
	}

	@Override
	public final StringDsc text()
	{
		return this;
	}
}