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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * accompanied this code).
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package com.sun.tools.javadoc.main;

import com.sun.source.util.TreePath;
import java.lang.reflect.Modifier;

import com.sun.javadoc.*;

import com.sun.tools.javac.code.Flags;
import com.sun.tools.javac.code.Symbol.ClassSymbol;
import com.sun.tools.javac.code.Symbol.VarSymbol;

import static com.sun.tools.javac.code.TypeTag.BOOLEAN;

Represents a field in a java class.
 
This is NOT part of any supported API.
 If you write code that depends on this, you do so at your own risk.
 This code and its internal interfaces are subject to change or
 deletion without notice.
Author:
Robert Field, Neal Gafter (rewrite), Scott Seligman (generics, enums, annotations)
See Also:
MemberDocImpl
Since:
1.2/**
 * Represents a field in a java class.
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 *
 * @see MemberDocImpl
 *
 * @since 1.2
 * @author Robert Field
 * @author Neal Gafter (rewrite)
 * @author Scott Seligman (generics, enums, annotations)
 */
@Deprecated
public class FieldDocImpl extends MemberDocImpl implements FieldDoc {

    protected final VarSymbol sym;

    
Constructor.
/**
     * Constructor.
     */
    public FieldDocImpl(DocEnv env, VarSymbol sym, TreePath treePath) {
        super(env, sym, treePath);
        this.sym = sym;
    }

    
Constructor.
/**
     * Constructor.
     */
    public FieldDocImpl(DocEnv env, VarSymbol sym) {
        this(env, sym, null);
    }

    
Returns the flags in terms of javac's flags
/**
     * Returns the flags in terms of javac's flags
     */
    protected long getFlags() {
        return sym.flags();
    }

    
Identify the containing class
/**
     * Identify the containing class
     */
    protected ClassSymbol getContainingClass() {
        return sym.enclClass();
    }

    
Get type of this field.
/**
     * Get type of this field.
     */
    public com.sun.javadoc.Type type() {
        return TypeMaker.getType(env, sym.type, false);
    }

    
Get the value of a constant field.
Returns:
the value of a constant field. The value is
automatically wrapped in an object if it has a primitive type.
If the field is not constant, returns null./**
     * Get the value of a constant field.
     *
     * @return the value of a constant field. The value is
     * automatically wrapped in an object if it has a primitive type.
     * If the field is not constant, returns null.
     */
    public Object constantValue() {
        Object result = sym.getConstValue();
        if (result != null && sym.type.hasTag(BOOLEAN))
            // javac represents false and true as Integers 0 and 1
            result = Boolean.valueOf(((Integer)result).intValue() != 0);
        return result;
    }

    
Get the value of a constant field.
Returns:
the text of a Java language expression whose value
is the value of the constant. The expression uses no identifiers
other than primitive literals. If the field is
not constant, returns null./**
     * Get the value of a constant field.
     *
     * @return the text of a Java language expression whose value
     * is the value of the constant. The expression uses no identifiers
     * other than primitive literals. If the field is
     * not constant, returns null.
     */
    public String constantValueExpression() {
        return constantValueExpression(constantValue());
    }

    
A static version of the above.
/**
     * A static version of the above.
     */
    static String constantValueExpression(Object cb) {
        if (cb == null) return null;
        if (cb instanceof Character) return sourceForm(((Character)cb).charValue());
        if (cb instanceof Byte) return sourceForm(((Byte)cb).byteValue());
        if (cb instanceof String) return sourceForm((String)cb);
        if (cb instanceof Double) return sourceForm(((Double)cb).doubleValue(), 'd');
        if (cb instanceof Float) return sourceForm(((Float)cb).doubleValue(), 'f');
        if (cb instanceof Long) return cb + "L";
        return cb.toString(); // covers int, short
    }
        // where
        private static String sourceForm(double v, char suffix) {
            if (Double.isNaN(v))
                return "0" + suffix + "/0" + suffix;
            if (v == Double.POSITIVE_INFINITY)
                return "1" + suffix + "/0" + suffix;
            if (v == Double.NEGATIVE_INFINITY)
                return "-1" + suffix + "/0" + suffix;
            return v + (suffix == 'f' || suffix == 'F' ? "" + suffix : "");
        }
        private static String sourceForm(char c) {
            StringBuilder buf = new StringBuilder(8);
            buf.append('\'');
            sourceChar(c, buf);
            buf.append('\'');
            return buf.toString();
        }
        private static String sourceForm(byte c) {
            return "0x" + Integer.toString(c & 0xff, 16);
        }
        private static String sourceForm(String s) {
            StringBuilder buf = new StringBuilder(s.length() + 5);
            buf.append('\"');
            for (int i=0; i<s.length(); i++) {
                char c = s.charAt(i);
                sourceChar(c, buf);
            }
            buf.append('\"');
            return buf.toString();
        }
        private static void sourceChar(char c, StringBuilder buf) {
            switch (c) {
            case '\b': buf.append("\\b"); return;
            case '\t': buf.append("\\t"); return;
            case '\n': buf.append("\\n"); return;
            case '\f': buf.append("\\f"); return;
            case '\r': buf.append("\\r"); return;
            case '\"': buf.append("\\\""); return;
            case '\'': buf.append("\\\'"); return;
            case '\\': buf.append("\\\\"); return;
            default:
                if (isPrintableAscii(c)) {
                    buf.append(c); return;
                }
                unicodeEscape(c, buf);
                return;
            }
        }
        private static void unicodeEscape(char c, StringBuilder buf) {
            final String chars = "0123456789abcdef";
            buf.append("\\u");
            buf.append(chars.charAt(15 & (c>>12)));
            buf.append(chars.charAt(15 & (c>>8)));
            buf.append(chars.charAt(15 & (c>>4)));
            buf.append(chars.charAt(15 & (c>>0)));
        }
        private static boolean isPrintableAscii(char c) {
            return c >= ' ' && c <= '~';
        }

    
Return true if this field is included in the active set.
/**
     * Return true if this field is included in the active set.
     */
    public boolean isIncluded() {
        return containingClass().isIncluded() && env.shouldDocument(sym);
    }

    
Is this Doc item a field (but not an enum constant?
/**
     * Is this Doc item a field (but not an enum constant?
     */
    @Override
    public boolean isField() {
        return !isEnumConstant();
    }

    
Is this Doc item an enum constant?
(For legacy doclets, return false.)
/**
     * Is this Doc item an enum constant?
     * (For legacy doclets, return false.)
     */
    @Override
    public boolean isEnumConstant() {
        return (getFlags() & Flags.ENUM) != 0 &&
               !env.legacyDoclet;
    }

    
Return true if this field is transient
/**
     * Return true if this field is transient
     */
    public boolean isTransient() {
        return Modifier.isTransient(getModifiers());
    }

    
Return true if this field is volatile
/**
     * Return true if this field is volatile
     */
    public boolean isVolatile() {
        return Modifier.isVolatile(getModifiers());
    }

    
Returns true if this field was synthesized by the compiler.
/**
     * Returns true if this field was synthesized by the compiler.
     */
    public boolean isSynthetic() {
        return (getFlags() & Flags.SYNTHETIC) != 0;
    }

    
Return the serialField tags in this FieldDocImpl item.
Returns:
an array of SerialFieldTagImpl containing all
        @serialField tags./**
     * Return the serialField tags in this FieldDocImpl item.
     *
     * @return an array of <tt>SerialFieldTagImpl</tt> containing all
     *         <code>&#64;serialField</code> tags.
     */
    public SerialFieldTag[] serialFieldTags() {
        return comment().serialFieldTags();
    }

    public String name() {
        if (name == null) {
            name = sym.name.toString();
        }
        return name;
    }

    private String name;

    public String qualifiedName() {
        if (qualifiedName == null) {
            qualifiedName = sym.enclClass().getQualifiedName() + "." + name();
        }
        return qualifiedName;
    }

    private String qualifiedName;

    
Return the source position of the entity, or null if
no position is available.
/**
     * Return the source position of the entity, or null if
     * no position is available.
     */
    @Override
    public SourcePosition position() {
        if (sym.enclClass().sourcefile == null) return null;
        return SourcePositionImpl.make(sym.enclClass().sourcefile,
                                       (tree==null) ? 0 : tree.pos,
                                       lineMap);
    }
}