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    • java.io.ObjectStreamField Maven / Gradle / Ivy

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    /*
 * Copyright 2016 Carlos Ballesteros Velasco
 *
 * 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.
 */

package java.io;

import java.lang.reflect.Field;
import java.util.Objects;

public class ObjectStreamField implements Comparable
{
    private final String name;
    private final String signature;
    private final Class type;
    private final boolean unshared;
    private final Field field;
    private int offset = 0;

    public ObjectStreamField(String name, Class type) {
        this(name, type, false);
    }

    public ObjectStreamField(String name, Class type, boolean unshared) {
        Objects.requireNonNull(name);
        this.name = name;
        this.type = type;
        this.unshared = unshared;
        signature = getClassSignature(type).intern();
        field = null;
    }

    ObjectStreamField(String name, String signature, boolean unshared) {
        Objects.requireNonNull(name);
        this.name = name;
        this.signature = signature.intern();
        this.unshared = unshared;
        field = null;

        switch (signature.charAt(0)) {
            case 'Z': type = Boolean.TYPE; break;
            case 'B': type = Byte.TYPE; break;
            case 'C': type = Character.TYPE; break;
            case 'S': type = Short.TYPE; break;
            case 'I': type = Integer.TYPE; break;
            case 'J': type = Long.TYPE; break;
            case 'F': type = Float.TYPE; break;
            case 'D': type = Double.TYPE; break;
            case 'L':
            case '[': type = Object.class; break;
            default: throw new IllegalArgumentException("illegal signature");
        }
    }

    ObjectStreamField(Field field, boolean unshared, boolean showType) {
        this.field = field;
        this.unshared = unshared;
        name = field.getName();
        Class ftype = field.getType();
        type = (showType || ftype.isPrimitive()) ? ftype : Object.class;
        signature = getClassSignature(ftype).intern();
    }

    public String getName() {
        return name;
    }
    public Class getType() {
        return type;
    }
    public char getTypeCode() {
        return signature.charAt(0);
    }
    public String getTypeString() {
        return isPrimitive() ? null : signature;
    }
    public int getOffset() {
        return offset;
    }
    protected void setOffset(int offset) {
        this.offset = offset;
    }
    public boolean isPrimitive() {
        return ((signature.charAt(0) != 'L') && (signature.charAt(0) != '['));
    }
    public boolean isUnshared() {
        return unshared;
    }

    public int compareTo(Object obj) {
        ObjectStreamField other = (ObjectStreamField) obj;
        boolean isPrim = isPrimitive();
        if (isPrim != other.isPrimitive()) return isPrim ? -1 : 1;
        return name.compareTo(other.name);
    }

    public String toString() {
        return signature + ' ' + name;
    }
    Field getField() {
        return field;
    }
    String getSignature() {
        return signature;
    }

    native private static String getClassSignature(Class cl);
}
    
    
    
    

    




    
    
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