86 lines
2.8 KiB
Java
86 lines
2.8 KiB
Java
/*
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* Copyright (C) 2015 The Dagger Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dagger.internal.codegen.writing;
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import static com.google.common.base.Preconditions.checkNotNull;
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import com.squareup.javapoet.ClassName;
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import com.squareup.javapoet.CodeBlock;
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import dagger.internal.codegen.writing.ComponentImplementation.ShardImplementation;
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/**
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* Represents a {@link com.sun.source.tree.MemberSelectTree} as a {@link CodeBlock}.
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*/
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abstract class MemberSelect {
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/**
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* Returns a {@link MemberSelect} that accesses the field given by {@code fieldName} owned by
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* {@code owningClass}. In this context "local" refers to the fact that the field is owned by the
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* type (or an enclosing type) from which the code block will be used. The returned {@link
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* MemberSelect} will not be valid for accessing the field from a different class (regardless of
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* accessibility).
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*/
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static MemberSelect localField(ShardImplementation owningShard, String fieldName) {
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return new LocalField(owningShard, fieldName);
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}
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private static final class LocalField extends MemberSelect {
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final ShardImplementation owningShard;
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final String fieldName;
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LocalField(ShardImplementation owningShard, String fieldName) {
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super(owningShard.name(), false);
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this.owningShard = owningShard;
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this.fieldName = checkNotNull(fieldName);
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}
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@Override
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CodeBlock getExpressionFor(ClassName usingClass) {
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return owningClass().equals(usingClass)
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? CodeBlock.of("$N", fieldName)
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: CodeBlock.of("$L.$N", owningShard.shardFieldReference(), fieldName);
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}
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}
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private final ClassName owningClass;
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private final boolean staticMember;
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MemberSelect(ClassName owningClass, boolean staticMemeber) {
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this.owningClass = owningClass;
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this.staticMember = staticMemeber;
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}
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/** Returns the class that owns the member being selected. */
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ClassName owningClass() {
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return owningClass;
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}
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/**
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* Returns true if the member being selected is static and does not require an instance of
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* {@link #owningClass()}.
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*/
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boolean staticMember() {
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return staticMember;
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}
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/**
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* Returns a {@link CodeBlock} suitable for accessing the member from the given {@code
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* usingClass}.
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*/
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abstract CodeBlock getExpressionFor(ClassName usingClass);
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}
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