org.eclipse.jdt.internal.core.jdom.DOMField Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2000, 2013 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.core.jdom;
import java.util.Enumeration;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.core.jdom.*;
import org.eclipse.jdt.internal.core.util.Messages;
import org.eclipse.jdt.internal.core.util.CharArrayBuffer;
import org.eclipse.jdt.internal.core.util.Util;
/**
* DOMField provides an implementation of IDOMField.
*
* @see IDOMField
* @see DOMNode
* @deprecated The JDOM was made obsolete by the addition in 2.0 of the more
* powerful, fine-grained DOM/AST API found in the
* org.eclipse.jdt.core.dom package.
*/
@SuppressWarnings("rawtypes")
class DOMField extends DOMMember implements IDOMField {
/**
* Contains the type of the field when the type
* has been altered from the contents in the
* document, otherwise null.
*/
protected String fType;
/**
* The original inclusive source range of the
* field's type in the document.
*/
protected int[] fTypeRange;
/**
* The contents of the initializer when the
* initializer has been altered from the
* original state in the document, otherwise
* null.
*/
protected String fInitializer;
/**
* The original inclusive source range of the
* initializer in the document.
*/
protected int[] fInitializerRange;
/**
* Constructs an empty field node.
*/
DOMField() {
// Constructs an empty field node
}
/**
* Creates a new detailed FIELD document fragment on the given range of the document.
*
* @param document - the document containing this node's original contents
* @param sourceRange - a two element array of integers describing the
* entire inclusive source range of this node within its document.
* Contents start on and include the character at the first position.
* Contents end on and include the character at the last position.
* An array of -1's indicates this node's contents do not exist
* in the document.
* @param name - the identifier portion of the name of this field,
* corresponding to VariableDeclaratorId (JLS 8.3).
* @param nameRange - a two element array of integers describing the
* entire inclusive source range of this node's name within its document,
* including any array qualifiers that might follow the name.
* @param commentRange - a two element array describing the comments that precede
* the member declaration. The first matches the start of this node's
* sourceRange, and the second is the new-line or first non-whitespace
* character following the last comment. If no comments are present,
* this array contains two -1's.
* @param flags - an integer representing the modifiers for this member. The
* integer can be analyzed with org.eclipse.jdt.core.Flags
* @param modifierRange - a two element array describing the location of
* modifiers for this member within its source range. The first integer
* is the first character of the first modifier for this member, and
* the second integer is the last whitespace character preceeding the
* next part of this member declaration. If there are no modifiers present
* in this node's source code (that is, package default visibility), this array
* contains two -1's.
* @param typeRange - a two element array describing the location of the
* typeName in the document - the positions of the first and last characters
* of the typeName.
* @param type - the type of the field, in normalized form, as defined in
* Type in Field Declaration (JLS 8.3)
* @param hasInitializer - true if this field declaration includes an initializer,
* otherwise false
* @param initRange - a two element array describing the location of the initializer
* in the declaration. The first integer is the position of the character
* following the equals sign, and the position of the last character is the last
* in the initializer. If this field has no initializer, this array contains
* two -1's.
* @param isVariableDeclarator - true if the field is a seconday variable declarator
* for a previous field declaration.
*/
DOMField(char[] document, int[] sourceRange, String name, int[] nameRange, int[] commentRange, int flags, int[] modifierRange, int[] typeRange, String type, boolean hasInitializer, int[] initRange, boolean isVariableDeclarator) {
super(document, sourceRange, name, nameRange, commentRange, flags, modifierRange);
this.fType= type;
this.fTypeRange= typeRange;
setHasInitializer(hasInitializer);
this.fInitializerRange= initRange;
setIsVariableDeclarator(isVariableDeclarator);
setMask(MASK_DETAILED_SOURCE_INDEXES, true);
}
/**
* Creates a new simple FIELD document fragment on the given range of the document.
*
* @param document - the document containing this node's original contents
* @param sourceRange - a two element array of integers describing the
* entire inclusive source range of this node within its document.
* Contents start on and include the character at the first position.
* Contents end on and include the character at the last position.
* An array of -1's indicates this node's contents do not exist
* in the document.
* @param name - the identifier portion of the name of this field,
* corresponding to VariableDeclaratorId (JLS 8.3).
* @param nameRange - a two element array of integers describing the
* entire inclusive source range of this node's name within its document,
* including any array qualifiers that might follow the name.
* @param flags - an integer representing the modifiers for this member. The
* integer can be analyzed with org.eclipse.jdt.core.Flags
* @param type - the type of the field, in normalized form, as defined in
* Type in Field Declaration (JLS 8.3)
* @param isVariableDeclarator - true if the field is a seconday variable declarator
* for a previous field declaration.
*/
DOMField(char[] document, int[] sourceRange, String name, int[] nameRange, int flags, String type, boolean isVariableDeclarator) {
this(document, sourceRange, name, nameRange, new int[] {-1, -1}, flags, new int[] {-1, -1}, new int[] {-1, -1}, type, false, new int[] {-1, -1}, isVariableDeclarator);
setMask(MASK_DETAILED_SOURCE_INDEXES, false);
}
/**
* Appends this member's body contents to the given CharArrayBuffer.
* Body contents include the member body and any trailing whitespace.
*
* A field does not have a body.
*
* @see DOMMember#appendMemberBodyContents(CharArrayBuffer)
*/
protected void appendMemberBodyContents(CharArrayBuffer buffer) {
// nothing to do
}
/**
* @see DOMMember#appendMemberDeclarationContents(CharArrayBuffer)
*/
protected void appendMemberDeclarationContents(CharArrayBuffer buffer) {
if (isVariableDeclarator()) {
buffer.append(this.fDocument, this.fSourceRange[0], this.fNameRange[0] - this.fSourceRange[0]);
} else {
buffer
.append(getTypeContents())
.append(this.fDocument, this.fTypeRange[1] + 1, this.fNameRange[0] - this.fTypeRange[1] - 1);
}
buffer.append(getNameContents());
if (hasInitializer()) {
if (this.fInitializerRange[0] < 0) {
buffer
.append('=')
.append(this.fInitializer)
.append(this.fDocument, this.fNameRange[1] + 1, this.fSourceRange[1] - this.fNameRange[1]);
} else {
buffer
.append(this.fDocument, this.fNameRange[1] + 1, this.fInitializerRange[0] - this.fNameRange[1] - 1)
.append(getInitializer())
.append(this.fDocument, this.fInitializerRange[1] + 1, this.fSourceRange[1] - this.fInitializerRange[1]);
}
} else {
if (this.fInitializerRange[0] < 0) {
buffer.append(this.fDocument, this.fNameRange[1] + 1, this.fSourceRange[1] - this.fNameRange[1]);
} else {
buffer.append(this.fDocument, this.fInitializerRange[1] + 1, this.fSourceRange[1] - this.fInitializerRange[1]);
}
}
}
/**
* Appends this member's header contents to the given CharArrayBuffer.
* Header contents include any preceding comments and modifiers.
*
*
If this field is a secondary variable declarator, there is no header.
*
* @see DOMMember#appendMemberHeaderFragment(CharArrayBuffer)
*/
protected void appendMemberHeaderFragment(CharArrayBuffer buffer) {
if (isVariableDeclarator()) {
return;
} else {
super.appendMemberHeaderFragment(buffer);
}
}
/**
* @see DOMMember#appendSimpleContents(CharArrayBuffer)
*/
protected void appendSimpleContents(CharArrayBuffer buffer) {
// append eveything before my name
buffer.append(this.fDocument, this.fSourceRange[0], this.fNameRange[0] - this.fSourceRange[0]);
// append my name
buffer.append(this.fName);
// append everything after my name
buffer.append(this.fDocument, this.fNameRange[1] + 1, this.fSourceRange[1] - this.fNameRange[1]);
}
/**
* Generates detailed source indexes for this node if possible.
*
* @exception DOMException if unable to generate detailed source indexes
* for this node
*/
protected void becomeDetailed() throws DOMException {
if (!isDetailed()) {
if (isVariableDeclarator() || hasMultipleVariableDeclarators()) {
DOMNode first = getFirstFieldDeclaration();
DOMNode last = getLastFieldDeclaration();
DOMNode node= first;
String source= first.getContents();
while (node != last) {
node= node.fNextNode;
source+=node.getContents();
}
DOMBuilder builder = new DOMBuilder();
IDOMField[] details= builder.createFields(source.toCharArray());
if (details.length == 0) {
throw new DOMException(Messages.dom_cannotDetail);
} else {
node= this;
for (int i= 0; i < details.length; i++) {
node.shareContents((DOMNode)details[i]);
node= node.fNextNode;
}
}
} else {
super.becomeDetailed();
}
}
}
/**
* @see IDOMNode#clone()
*/
public Object clone() {
if (isVariableDeclarator() || hasMultipleVariableDeclarators()) {
return getFactory().createField(new String(getSingleVariableDeclaratorContents()));
} else {
return super.clone();
}
}
/**
* Expands all variable declarators in this field declaration into
* stand-alone field declarations.
*/
protected void expand() {
if (isVariableDeclarator() || hasMultipleVariableDeclarators()) {
Enumeration siblings= new SiblingEnumeration(getFirstFieldDeclaration());
DOMField field= (DOMField)siblings.nextElement();
DOMNode next= field.fNextNode;
while (siblings.hasMoreElements() && (next instanceof DOMField) && (((DOMField)next).isVariableDeclarator())) {
field.localizeContents();
if (field.fParent != null) {
field.fParent.fragment();
}
field= (DOMField)siblings.nextElement();
next= field.fNextNode;
}
field.localizeContents();
}
}
/**
* @see DOMNode#getDetailedNode()
*/
protected DOMNode getDetailedNode() {
if (isVariableDeclarator() || hasMultipleVariableDeclarators()) {
return (DOMNode)getFactory().createField(new String(getSingleVariableDeclaratorContents()));
} else {
return (DOMNode)getFactory().createField(getContents());
}
}
/**
* Returns the first field document fragment that defines
* the type for this variable declarator.
*/
protected DOMField getFirstFieldDeclaration() {
if (isVariableDeclarator()) {
return ((DOMField)this.fPreviousNode).getFirstFieldDeclaration();
} else {
return this;
}
}
/**
* @see IDOMField#getInitializer()
*/
public String getInitializer() {
becomeDetailed();
if (hasInitializer()) {
if (this.fInitializer != null) {
return this.fInitializer;
} else {
return new String(this.fDocument, this.fInitializerRange[0], this.fInitializerRange[1] + 1 - this.fInitializerRange[0]);
}
} else {
return null;
}
}
/**
* @see IDOMNode#getJavaElement
*/
public IJavaElement getJavaElement(IJavaElement parent) throws IllegalArgumentException {
if (parent.getElementType() == IJavaElement.TYPE) {
return ((IType)parent).getField(getName());
} else {
throw new IllegalArgumentException(Messages.element_illegalParent);
}
}
/**
* Returns the last field document fragment in this muli-declarator statement.
*/
protected DOMField getLastFieldDeclaration() {
DOMField field = this;
while (field.isVariableDeclarator() || field.hasMultipleVariableDeclarators()) {
if (field.fNextNode instanceof DOMField && ((DOMField)field.fNextNode).isVariableDeclarator()) {
field= (DOMField)field.fNextNode;
} else {
break;
}
}
return field;
}
/**
* @see DOMMember#getMemberDeclarationStartPosition()
*/
protected int getMemberDeclarationStartPosition() {
return this.fTypeRange[0];
}
/**
* @see IDOMNode#getNodeType()
*/
public int getNodeType() {
return IDOMNode.FIELD;
}
/**
* Returns a String representing this field declaration as a field
* declaration with one variable declarator.
*/
protected char[] getSingleVariableDeclaratorContents() {
CharArrayBuffer buffer= new CharArrayBuffer();
DOMField first= getFirstFieldDeclaration();
if (first.isDetailed()) {
first.appendMemberHeaderFragment(buffer);
buffer.append(getType());
if (isVariableDeclarator()) {
buffer.append(' ');
} else {
buffer.append(this.fDocument, this.fTypeRange[1] + 1, this.fNameRange[0] - this.fTypeRange[1] - 1);
}
} else {
buffer.append(first.fDocument, first.fSourceRange[0], first.fNameRange[0] - first.fSourceRange[0]);
}
buffer.append(getName());
if (hasInitializer()) {
if (this.fInitializerRange[0] < 0) {
buffer
.append('=')
.append(this.fInitializer)
.append(';')
.append(Util.getLineSeparator(buffer.toString(), null));
} else {
buffer
.append(this.fDocument, this.fNameRange[1] + 1, this.fInitializerRange[0] - this.fNameRange[1] - 1)
.append(getInitializer())
.append(';')
.append(Util.getLineSeparator(buffer.toString(), null));
}
} else {
buffer.append(';').append(Util.getLineSeparator(buffer.toString(), null));
}
return buffer.getContents();
}
/**
* @see IDOMField#getType()
*/
public String getType() {
return this.fType;
}
/**
* Returns the souce code to be used for this
* field's type.
*/
protected char[] getTypeContents() {
if (isTypeAltered()) {
return this.fType.toCharArray();
} else {
return CharOperation.subarray(this.fDocument, this.fTypeRange[0], this.fTypeRange[1] + 1);
}
}
/**
* Returns true if this field has an initializer expression,
* otherwise false.
*/
protected boolean hasInitializer() {
return getMask(MASK_FIELD_HAS_INITIALIZER);
}
/**
* Returns true is this field declarations has more than one
* variable declarator, otherwise false;
*/
protected boolean hasMultipleVariableDeclarators() {
return this.fNextNode != null && (this.fNextNode instanceof DOMField) &&
((DOMField)this.fNextNode).isVariableDeclarator();
}
/**
* Inserts the given un-parented node as a sibling of this node, immediately before
* this node. Once inserted, the sibling is only dependent on this document fragment.
*
*
When a sibling is inserted before a variable declarator, it must first
* be expanded.
*
* @see IDOMNode#insertSibling(IDOMNode)
*/
public void insertSibling(IDOMNode sibling) throws IllegalArgumentException, DOMException {
if (isVariableDeclarator()) {
expand();
}
super.insertSibling(sibling);
}
/**
* Returns true if this field's type has been altered
* from the original document contents.
*/
protected boolean isTypeAltered() {
return getMask(MASK_FIELD_TYPE_ALTERED);
}
/**
* Returns true if this field is declared as a secondary variable
* declarator for a previous field declaration.
*/
protected boolean isVariableDeclarator() {
return getMask(MASK_FIELD_IS_VARIABLE_DECLARATOR);
}
/**
* @see DOMNode
*/
protected DOMNode newDOMNode() {
return new DOMField();
}
/**
* Normalizes this DOMNode's end position.
*/
void normalizeEndPosition(ILineStartFinder finder, DOMNode next) {
if (next == null) {
// this node's end position includes all of the characters up
// to the end of the enclosing node
DOMNode parent = (DOMNode) getParent();
if (parent == null || parent instanceof DOMCompilationUnit) {
setSourceRangeEnd(this.fDocument.length - 1);
} else {
// parent is a type
int temp = ((DOMType)parent).getCloseBodyPosition() - 1;
setSourceRangeEnd(temp);
this.fInsertionPosition = Math.max(finder.getLineStart(temp + 1), getEndPosition());
}
} else {
// this node's end position is just before the start of the next node
// unless the next node is a field that is declared along with this one
int temp = next.getStartPosition() - 1;
this.fInsertionPosition = Math.max(finder.getLineStart(temp + 1), getEndPosition());
next.normalizeStartPosition(getEndPosition(), finder);
if (next instanceof DOMField) {
DOMField field = (DOMField) next;
if (field.isVariableDeclarator() && this.fTypeRange[0] == field.fTypeRange[0])
return;
}
setSourceRangeEnd(next.getStartPosition() - 1);
}
}
/**
* Normalizes this DOMNode's start position.
*/
void normalizeStartPosition(int endPosition, ILineStartFinder finder) {
if (isVariableDeclarator()) {
// start position is end of last element
setStartPosition(this.fPreviousNode.getEndPosition() + 1);
} else {
super.normalizeStartPosition(endPosition, finder);
}
}
/**
* Offsets all the source indexes in this node by the given amount.
*/
protected void offset(int offset) {
super.offset(offset);
offsetRange(this.fInitializerRange, offset);
offsetRange(this.fTypeRange, offset);
}
/**
* Separates this node from its parent and siblings, maintaining any ties that
* this node has to the underlying document fragment.
*
*
When a field with multiple declarators is removed, its declaration
* must first be expanded.
*
* @see IDOMNode#remove()
*/
public void remove() {
expand();
super.remove();
}
/**
* @see IDOMMember#setComment(String)
*/
public void setComment(String comment) {
expand();
super.setComment(comment);
}
/**
* @see IDOMMember#setFlags(int)
*/
public void setFlags(int flags) {
expand();
super.setFlags(flags);
}
/**
* Sets the state of this field declaration as having
* an initializer expression.
*/
protected void setHasInitializer(boolean hasInitializer) {
setMask(MASK_FIELD_HAS_INITIALIZER, hasInitializer);
}
/**
* @see IDOMField#setInitializer(String)
*/
public void setInitializer(String initializer) {
becomeDetailed();
fragment();
setHasInitializer(initializer != null);
this.fInitializer= initializer;
}
/**
* Sets the initializer range.
*/
void setInitializerRange(int start, int end) {
this.fInitializerRange[0] = start;
this.fInitializerRange[1] = end;
}
/**
* Sets the state of this field declaration as being a
* secondary variable declarator for a previous field
* declaration.
*/
protected void setIsVariableDeclarator(boolean isVariableDeclarator) {
setMask(MASK_FIELD_IS_VARIABLE_DECLARATOR, isVariableDeclarator);
}
/**
* @see IDOMField#setName(String)
*/
public void setName(String name) throws IllegalArgumentException {
if (name == null) {
throw new IllegalArgumentException(Messages.element_nullName);
} else {
super.setName(name);
setTypeAltered(true);
}
}
/**
* @see IDOMField#setType(String)
*/
public void setType(String typeName) throws IllegalArgumentException {
if (typeName == null) {
throw new IllegalArgumentException(Messages.element_nullType);
}
becomeDetailed();
expand();
fragment();
setTypeAltered(true);
setNameAltered(true);
this.fType= typeName;
}
/**
* Sets the state of this field declaration as having
* the field type altered from the original document.
*/
protected void setTypeAltered(boolean typeAltered) {
setMask(MASK_FIELD_TYPE_ALTERED, typeAltered);
}
/**
* @see DOMNode#shareContents(DOMNode)
*/
protected void shareContents(DOMNode node) {
super.shareContents(node);
DOMField field= (DOMField)node;
this.fInitializer= field.fInitializer;
this.fInitializerRange= rangeCopy(field.fInitializerRange);
this.fType= field.fType;
this.fTypeRange= rangeCopy(field.fTypeRange);
}
/**
* @see IDOMNode#toString()
*/
public String toString() {
return "FIELD: " + getName(); //$NON-NLS-1$
}
}