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Java example source code file (CharSequenceValueConverter.java)

This example Java source code file (CharSequenceValueConverter.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

asciistring, charsequence, charsequencevalueconverter, instance, override, parseexception, text

The CharSequenceValueConverter.java Java example source code

/*
 * Copyright 2015 The Netty Project
 *
 * The Netty Project 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.
 */
package io.netty.handler.codec;

import io.netty.handler.codec.DefaultHeaders.HeaderDateFormat;
import io.netty.util.AsciiString;
import io.netty.util.internal.PlatformDependent;

import java.text.ParseException;

/**
 * Converts to/from native types, general {@link Object}, and {@link CharSequence}s.
 */
public class CharSequenceValueConverter implements ValueConverter<CharSequence> {
    public static final CharSequenceValueConverter INSTANCE = new CharSequenceValueConverter();

    @Override
    public CharSequence convertObject(Object value) {
        if (value instanceof CharSequence) {
            return (CharSequence) value;
        }
        return value.toString();
    }

    @Override
    public CharSequence convertInt(int value) {
        return String.valueOf(value);
    }

    @Override
    public CharSequence convertLong(long value) {
        return String.valueOf(value);
    }

    @Override
    public CharSequence convertDouble(double value) {
        return String.valueOf(value);
    }

    @Override
    public CharSequence convertChar(char value) {
        return String.valueOf(value);
    }

    @Override
    public CharSequence convertBoolean(boolean value) {
        return String.valueOf(value);
    }

    @Override
    public CharSequence convertFloat(float value) {
        return String.valueOf(value);
    }

    @Override
    public boolean convertToBoolean(CharSequence value) {
        if (value instanceof AsciiString) {
            return ((AsciiString) value).parseBoolean();
        }
        return Boolean.parseBoolean(value.toString());
    }

    @Override
    public CharSequence convertByte(byte value) {
        return String.valueOf(value);
    }

    @Override
    public byte convertToByte(CharSequence value) {
        if (value instanceof AsciiString) {
            return ((AsciiString) value).byteAt(0);
        }
        return Byte.valueOf(value.toString());
    }

    @Override
    public char convertToChar(CharSequence value) {
        return value.charAt(0);
    }

    @Override
    public CharSequence convertShort(short value) {
        return String.valueOf(value);
    }

    @Override
    public short convertToShort(CharSequence value) {
        if (value instanceof AsciiString) {
            return ((AsciiString) value).parseShort();
        }
        return Short.valueOf(value.toString());
    }

    @Override
    public int convertToInt(CharSequence value) {
        if (value instanceof AsciiString) {
            return ((AsciiString) value).parseInt();
        }
        return Integer.parseInt(value.toString());
    }

    @Override
    public long convertToLong(CharSequence value) {
        if (value instanceof AsciiString) {
            return ((AsciiString) value).parseLong();
        }
        return Long.parseLong(value.toString());
    }

    @Override
    public CharSequence convertTimeMillis(long value) {
        return String.valueOf(value);
    }

    @Override
    public long convertToTimeMillis(CharSequence value) {
        try {
            return HeaderDateFormat.get().parse(value.toString());
        } catch (ParseException e) {
            PlatformDependent.throwException(e);
            return 0;
        }
    }

    @Override
    public float convertToFloat(CharSequence value) {
        if (value instanceof AsciiString) {
            return ((AsciiString) value).parseFloat();
        }
        return Float.valueOf(value.toString());
    }

    @Override
    public double convertToDouble(CharSequence value) {
        if (value instanceof AsciiString) {
            return ((AsciiString) value).parseDouble();
        }
        return Double.valueOf(value.toString());
    }
}

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