| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php |
| * |
| * 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 com.android.ide.eclipse.adt.internal.editors.layout.gle2; |
| |
| import com.android.annotations.NonNull; |
| import com.android.ide.common.api.INode.IAttribute; |
| |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Represents one XML attribute in a {@link SimpleElement}. |
| * <p/> |
| * The attribute is always represented by a namespace URI, a name and a value. |
| * The name cannot be empty. |
| * The namespace URI can be empty for an attribute without a namespace but is never null. |
| * The value can be empty but cannot be null. |
| * <p/> |
| * For a more detailed explanation of the purpose of this class, |
| * please see {@link SimpleXmlTransfer}. |
| */ |
| public class SimpleAttribute implements IAttribute { |
| private final String mName; |
| private final String mValue; |
| private final String mUri; |
| |
| /** |
| * Creates a new {@link SimpleAttribute}. |
| * <p/> |
| * Any null value will be converted to an empty non-null string. |
| * However it is a semantic error to use an empty name -- no assertion is done though. |
| * |
| * @param uri The URI of the attribute. |
| * @param name The XML local name of the attribute. |
| * @param value The value of the attribute. |
| */ |
| public SimpleAttribute(String uri, String name, String value) { |
| mUri = uri == null ? "" : uri; |
| mName = name == null ? "" : name; |
| mValue = value == null ? "" : value; |
| } |
| |
| /** |
| * Returns the namespace URI of the attribute. |
| * Can be empty for an attribute without a namespace but is never null. |
| */ |
| @Override |
| public @NonNull String getUri() { |
| return mUri; |
| } |
| |
| /** Returns the XML local name of the attribute. Cannot be null nor empty. */ |
| @Override |
| public @NonNull String getName() { |
| return mName; |
| } |
| |
| /** Returns the value of the attribute. Cannot be null. Can be empty. */ |
| @Override |
| public @NonNull String getValue() { |
| return mValue; |
| } |
| |
| // reader and writer methods |
| |
| @Override |
| public String toString() { |
| return String.format("@%s:%s=%s\n", //$NON-NLS-1$ |
| mName, |
| mUri, |
| mValue); |
| } |
| |
| private static final Pattern REGEXP = |
| Pattern.compile("[^@]*@([^:]+):([^=]*)=([^\n]*)\n*"); //$NON-NLS-1$ |
| |
| static SimpleAttribute parseString(String value) { |
| Matcher m = REGEXP.matcher(value); |
| if (m.matches()) { |
| return new SimpleAttribute(m.group(2), m.group(1), m.group(3)); |
| } |
| |
| return null; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj instanceof SimpleAttribute) { |
| SimpleAttribute sa = (SimpleAttribute) obj; |
| |
| return mName.equals(sa.mName) && |
| mUri.equals(sa.mUri) && |
| mValue.equals(sa.mValue); |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| long c = mName.hashCode(); |
| // uses the formula defined in java.util.List.hashCode() |
| c = 31*c + mUri.hashCode(); |
| c = 31*c + mValue.hashCode(); |
| if (c > 0x0FFFFFFFFL) { |
| // wrap any overflow |
| c = c ^ (c >> 32); |
| } |
| return (int)(c & 0x0FFFFFFFFL); |
| } |
| } |